ÿþ<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> <meta name=ProgId content=FrontPage.Editor.Document> <meta name=Generator content="Microsoft FrontPage 12.0"> <meta name=Originator content="Microsoft Word 9"> <link rel=Edit-Time-Data href="http://www.engin.brown.edu/courses/en31/index_files/editdata.mso"> <title>EN31 Mechanics of Solids and Structures</title> <!--[if gte mso 9]><xml> <o:DocumentProperties> <o:Author>ramasubr</o:Author> <o:Template>Normal</o:Template> <o:LastAuthor>ramasubr</o:LastAuthor> <o:Revision>7</o:Revision> <o:TotalTime>7</o:TotalTime> <o:Created>2003-10-30T00:08:00Z</o:Created> <o:LastSaved>2003-11-24T23:00:00Z</o:LastSaved> <o:Pages>1</o:Pages> <o:Words>321</o:Words> <o:Characters>1830</o:Characters> <o:Company>Brown University</o:Company> <o:Lines>15</o:Lines> <o:Paragraphs>3</o:Paragraphs> <o:CharactersWithSpaces>2247</o:CharactersWithSpaces> <o:Version>9.6926</o:Version> </o:DocumentProperties> </xml><![endif]--> <style> <!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman"; margin-left:0in; margin-right:0in; margin-top:0in} a:link, span.MsoHyperlink {color:blue; text-decoration:underline; text-underline:single;} a:visited, span.MsoHyperlinkFollowed {color:purple; text-decoration:underline; text-underline:single;} p {margin-right:0in; mso-margin-top-alt:auto; mso-margin-bottom-alt:auto; margin-left:0in; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in; mso-header-margin:.5in; mso-footer-margin:.5in; mso-paper-source:0;} div.Section1 {page:Section1;} body{font-family:arial,sans-serif}body{background:#fff;margin:0}.fs{border-left:9px solid}.sd .fs{border-left-color:#c3d9ff}.msg{} td{font-family:arial,sans-serif}.cbl{background-image:url('http://mail.google.com/mail/images/card_left_new.gif');background-position: left 50%;background-repeat:repeat-y}.mb{font-size:80%;padding:6 8 10 14;width:100%} .style1 { text-align: center; } .style2 { font-family: "Times New Roman", Times, serif; } .style3 { color: #0000FF; text-decoration: underline; } .style7 { font-size: x-small; } .style8 { font-family: Arial; color: #FF0000; } .style9 { font-family: Symbol; } .style11 { font-family: "Times New Roman", Times, serif; font-size: small; } .style12 { font-family: Symbol; font-size: small; } .style13 { font-size: small; } .style14 { font-family: Arial; } .style16 { font-family: Calibri; font-size: small; } .style17 { font-family: "Times New Roman", Times, serif; font-size: medium; } .style18 { font-family: Symbol; font-size: medium; } .style19 { font-family: Calibri; font-size: medium; } .style20 { font-family: Calibri; } .style21 { font-family: Arial, Helvetica, sans-serif; font-size: x-small; } .style23 { font-family: Arial, Helvetica, sans-serif; } --> </style> <!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> <meta name=Template content="\\EN-FILSRVR\APPS1\OFF97\MSOFFICE\Office\html.dot"> </head> <body lang=EN-US link=#0000FF vlink=#800080 style='tab-interval:.5in'> <div class=Section1> <p align=center style='text-align:center'><font size="6" face="Viner Hand ITC"> EN31: Mechanics of Solids and Structures</font></p> <h2 align=center style='text-align:center'> <img border="0" src="GoldenGateBridge.jpg" width="337" height="303"></h2> <div align=center> <table border=1 cellspacing=1 cellpadding=0 width=785 style='width:588.6pt; mso-cellspacing:.7pt;mso-padding-alt:0in 0in 0in 0in'> <tr style='height:15.7pt'> <td style='width:98%; padding:.75pt .75pt .75pt .75pt; height:15.7pt' colspan="2" class="style1"> <img id="_x0000_i1049" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><span class="style2"><a href="en31_2011general/generalinfo.htm"><strong>General Information</strong></a></span> </td> </tr> <!--<tr style='height:15.7pt'> <td width="48%" style='width:48.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img id="_x0000_i1045" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><a href="hw_2009.htm">Homework Assignments 2009</a> <a href="hw_sols_2009.htm">(Solutions) </a> </p> </td> <td width="50%" style='width:50.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img border=0 id="_x0000_i1029" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> <a href="hw_2008.htm">Sample </a></span> <a href="hw_2008.htm">Homework Assignments 2008</a>&nbsp;</p> </td> </tr> <tr style='height:15.7pt'> <td width="48%" style='width:48.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p style='tab-stops:list .5in'><img border=0 src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span>Exams<span style="mso-spacerun: yes"> </span><b><span style='color:red'>&nbsp;</span></b></p> </td> <td width="50%" style='width:50.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img border=0 id="_x0000_i1046" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><a href="hw_sols_2008.htm">Sample Homework Solutions 2008</a> </p> </td> </tr> <tr style='height:15.7pt'> <td width="48%" style='width:48.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img border=0 id="_x0000_i1030" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><a href="labinfo-06.htm">Laboratory Information</a>:<a href="Lab1/Lab1-guidelines.pdf"> Lab1</a> <a href="lab2mod.pdf">Lab2</a> <a href="ErrorAnalysis.pdf">Error Analysis</a>&nbsp;</p> </td> <td width="50%" style='width:50.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img border=0 id="_x0000_i1047" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><a href="2006/Exams/MidtermExam2006.pdf">Sample Midterm Exam</a> <a href="2006/Exams/midterm%20soln.pdf">(Solutions)</a></p> </td> </tr> <tr style='height:15.7pt'> <td width="48%" style='width:48.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img border=0 id="_x0000_i1032" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><a href="design_2008/DesignPage.htm">Design Project </a> </p> </td> <td width="50%" style='width:50.82%;padding:.75pt .75pt .75pt .75pt; height:15.7pt'> <p><img border=0 id="_x0000_i1039" src=rbullet.gif width="14" height="14"><span style="mso-spacerun: yes"> </span><a href="2006/Exams/FinalExam2006.pdf">Sample Final Exam</a> <a href="2006/Exams/FinalExamSolutions.pdf">(Solutions)</a></p>--> </td> </tr> </table> </div> <p align="center"><b><font size="6">Announcements</font></b></p> <p align="center"><b><img width=573 height=6 id="_x0000_i1048" src=line1.gif></b></p> <ul> <!-- <li class="style7"><font size="2">17/12/2009: <span class="style8"><strong>New! Messages. </strong></span> </font> <span class="style14">Final Exam is open book/notes and will be held in </span> <span class="style11"><strong>MacMillan Hall 117</strong></span><span class="style14">, NOT our regular classroom. This information is on the university web. Below is the detailed info:<br> (1) For the general class, <br> Mechanics of Solids/Structures - ENGN0310 <br> Exam Group: 02<br> Exam Date 12\19\2009 <br> Exam Time </span> <span class="style11"><strong>02:00 pm -05:00 pm </strong></span> <span class="style14"><br> Building Room Number: </span> <span class="style11"><strong>MacMillan Hall 117</strong></span><span class="style14"> <br> (2) For students registered with DSS: <br> The exam will be held in the room # </span> <span class="style11"><strong> 153 Barus &amp; Holley</strong></span><span class="style14">. Concerned students are requested to bring the necessary document and arrive at </span> <span class="style11"><strong>12:30 pm</strong></span><span class="style14"> (for 50% additional&nbsp;&nbsp;&nbsp; time) or </span> <span class="style11"><strong>11:00 am </strong></span> <span class="style14">(for 100% additional time). The exam will </span> <span class="style11"><strong>end at 5:00 pm</strong></span><span class="style14">.</span></li> <li class="style7"><font size="2">16/12/2009: <span class="style8"><strong>New! Messages. </strong></span> Exam location for </font><strong><span class="style11">students registered with DSS</span></strong><font size="2">: Room # 153, Barus &amp; Holley</font> <br> <font size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Date: 12/19/2009</font> <br> <font size="2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Time: 11am-5pm (100% additional time) or 12:30pm-5:00pm (for 50% additional time)</font> </li> <li class="style7">09/12/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #1<font size="2">1 Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">09/12/2009: There will be <span class="style11"><strong>NO more lectures/recitations</strong></span> before the final exam. We will still have office hours next week. You are welcome to come to talk to me or the TAs about the class material.</li> <li class="style7">08/12/2009: There is another typo in Problem 11.132: &quot;<span class="style9"><em><strong>d</strong></em></span><sub><span class="style14"><em><strong>c</strong></em></span></sub><em><strong>=PL</strong></em><sup><span class="style8"><em><strong>2</strong></em></span></sup><em><strong>(1+1.5E<span class="style8">r</span></strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>/(GL</strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>))/(3EI)</strong></em>&quot; should be &quot;<span class="style9"><em><strong>d</strong></em></span><sub><span class="style14"><em><strong>c</strong></em></span></sub><em><strong>=PL</strong></em><sup><span class="style8"><em><strong>3</strong></em></span></sup><em><strong>(1+1.5E</strong><span class="style8"><strong>a</strong></span><sup><span class="style14"><strong>2</strong></span></sup><strong>/(GL</strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>))/(3EI)</strong></em>&quot;. The <a href="HW_Sol_2009/HW112009.pdf"><strong>modified PDF for HW#11</strong></a> has been posted.</li> <li class="style7">07/12/2009: There is a typo in Problem 11.132: &quot;<span class="style9"><em><strong>d</strong></em></span><sub><span class="style14"><em><strong>c</strong></em></span></sub><em><strong>=PL</strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>(1+1.5E<span class="style8">r</span></strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>/(GL</strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>))/(3EI)</strong></em>&quot; should be &quot;<span class="style9"><em><strong>d</strong></em></span><sub><span class="style14"><em><strong>c</strong></em></span></sub><em><strong>=PL</strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>(1+1.5E</strong><span class="style8"><strong>a</strong></span><sup><span class="style14"><strong>2</strong></span></sup><strong>/(GL</strong></em><sup><span class="style14"><em><strong>2</strong></em></span></sup><em><strong>))/(3EI)</strong></em>&quot;.</li> <li class="style7">07/12/2009: <span class="style11">Please note that the design project demo will be on <strong>Friday</strong>, <strong>Dec 11</strong>. We will begin at <strong>8am</strong> and try to finish by <strong>1pm or earlier</strong>. Every team is expected to hand in a written report (with design and analysis), deliver a presentation (basic concept, design, testing, performance) along with the device demo on the spot. Division of labor among the team members is highly recommended. </span></li> <li class="style7">02/12/2009: <a href="hw_2009.htm"><strong> Homework #</strong><span class="style3"><strong>11</strong></span></a><font size="2"> is now posted.</font></li> <li class="style7">02/12/2009: <span class="style11">Please note some changes to the description of design project on the website. The file was made a few years ago. The changes are:<br> 1. We will not be using room 097 as stated in the PDF. Please use the EN31 space in the Prinz Lab (see Brian Corkum).<br> 2. We will not require an HTML website this year. However, the website feature has always been treated as part of the design innovation/presentation and will gain your team extra point(s). You may also present your project in a PPT/PDF etc. The design competition will consist of a presentation part and a demo part to be shared among the team members</span><span class="style8">.</span></li> <li class="style7">01/12/2009: <span class="style11">The following hints might be helpful:<br> (1) It will be important to build in some flexibility so you could fine tune the system at the last stage. For example, suppose you have a cantilever in your system, you can allow the holder of the laser pointer to be able to slide over some range to achieve the best result.<br> (2) Some groups have adopted fancy dashpot designs. I know our intuition would tell us that we need to damp out the motion as much as possible. However, the theory indicates it is better to minimize the viscosity of the system, rather than increase it. <br> (3) Since the final evaluation would impose penalty points on weight, it would be most beneficial to focus your attention on apply the knowledge we learned in the class on how to reduce the STIFFNESS of your structure to achieve the desired result.</span></li> <li class="style7">01/12/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #10<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">20/11/2009: <a href="hw_2009.htm"><strong> Homework #</strong><span class="style3"><strong>10</strong></span></a><font size="2"> is now posted. Note that HW#10 due on </font><span class="style11"><strong> Monday, Nov. 30</strong></span><font size="2">.</font></li> <li class="style7">20/11/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #9<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">19/11/2009: <font size="2">Due date of </font> <span class="style11"><strong>Lab 2</strong></span><font size="2"> report is postponed to </font><span class="style11"><strong>Wednesday</strong></span><font size="2">, </font><span class="style11"><strong>Nov. 25</strong></span><font size="2">.</font></li> <li class="style7">13/11/2009: <a href="hw_2009.htm"><strong> Homework #</strong><span class="style3"><strong>9</strong></span></a><font size="2"> is now posted.</font></li> <li class="style7">13/11/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #8<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">13/11/2009: <span class="style14"> <a href="design_2009/design_2009.pdf"><strong> Design </strong> <b>Description</b></a> is now posted.</span></li> <li class="style7">13/11/2009: <span class="style14"><strong> <a href="design_2009/DesignProj-13Nov09.ppt">Design Project Lecture</a></strong> is now posted.</span></li> <li class="style7">12/11/2009: PDF file of<strong> </strong> Homework #8<font size="2"> posted early has a typo: in Problem 7.60, &quot; </font> <span class="style11"><strong>tensile stress is equal to or less than 60MPa</strong></span><font size="2"> &quot; should be &quot; </font><span class="style11"><strong>in-plane shearing stress is equal to or less than 150</strong></span><span class="style2"><strong><span class="style13">MPa</span></strong></span><font size="2"> &quot;. The corrected <a href="HW_Sol_2009/HW82009.pdf"><strong>PDF file of Homework #</strong><span class="style3">8</span></a> is now posted.</font></li> <li class="style7">07/11/2009: <span class="style14">We will start planning on the</span><span class="style11"><strong> final design project</strong></span><span class="style14"> for the course. There will be a </span> <span class="style11"><strong>kick-off lecture</strong></span><span class="style14"> on </span> <span class="style11"><strong>Friday Nov. 13</strong></span><span class="style14">. It is important that everyone attend this lecture. Prof. Gao will discuss the organization, objective and project evaluations and answer any questions.</span></li> <li class="style7">07/11/2009: <span class="style14">(1) If you have not done so, please </span><span class="style11"><strong>sign up for Lab 2</strong></span><span class="style14"> (sign-up sheet posted on the door of BH 610. The time slots have been arranged from </span><span class="style11"><strong>Tuesday (Nov. 10)</strong></span><span class="style14"> to </span><span class="style11"><strong>Friday (Nov. 13)</strong></span><span class="style14">; (2) The report for Lab 2 will be due on </span><span class="style11"> <strong>Friday, Nov. 20</strong></span><span class="style14">.</span></li> <li class="style7">06/11/2009: <a href="hw_2009.htm"><strong>Homework #</strong><span class="style3"><strong>8</strong></span></a><font size="2"> is now posted.</font></li> <li class="style7">06/11/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #7<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">30/10/2009: <a href="hw_2009.htm"><strong>Homework #</strong><span class="style3"><strong>7</strong></span></a><font size="2"> is now posted.</font></li> <li class="style7">28/10/2009: <span class="style14"> <strong><span class="style8"><a href="hw_sols_2009.htm">Midterm<font size="2"> Solution</font></a></span></strong> is now posted.</span></li> <li class="style7">25/10/2009: <span class="style14"> Midterm is </span><span class="style11"> <strong>open-book</strong></span><span class="style14"><font size="2" face="Arial"> and <span class="style11"><strong>open-note</strong></span>. Allow to use calculators, class-notes and homework solutions. The exam will cover <span class="style11"><strong>everything up to HW#6</strong></span>.</font></span></li> <li class="style7">23/10/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #6<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">21/10/2009:<font size="2"><strong> </strong></font> <span class="style23">There seem to be a lot of questions about the error analysis in your lab 1 report due to some inconsistencies in the handouts (some from previous years). We have decided to adopt the following uniform rule:</span><font size="2"> </font><span class="style23">unless more precise information is known (from the instruments used in the lab or TAs) about a particular error in the measurement, we shall assume all parameters are known within 1% uncertainty.</span></li> <li class="style7">21/10/2009:<font size="2"><strong> </strong> <span class="style21">A </span> <span class="style11"><strong>midterm review lecture</strong></span><span class="style21"> will be held on </span> <span class="style11"> <strong>Monday, October 26</strong></span><span class="style21">. Prof. Gao will review some concepts and typical midterm problems from previous years.</span><span class="style11"><strong><b> </b></strong></span></font></li> <li class="style7">21/10/2009:<font size="2"><strong> </strong></font> <span class="style21">Lab 1 report due date is extended to </span> <span class="style11"><strong>next Monday</strong></span><font size="2"><span class="style11"><strong> (October, 26)</strong></span><span class="style21">.</span></font></li> <li class="style7">21/10/2009:<font size="2"><strong> </strong> </font><span style="COLOR: windowtext" class="style23">Here are two additional issues regarding the lab:</span><font size="2"><span class="style23"><br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) </span> <span style="COLOR: windowtext"><span class="style21">The load sensitivity given in the handout is off by a factor of 10 compared to what was actually used this year. Please check that </span><span class="style11"> <strong>the maximum load</strong></span><span class="style21"> applied on the sample is around </span><span class="style11"> <strong>4 kN</strong></span><span class="style21">, which would correspond to a load sensitivity ratio of 1 kN/volt, instead of 10 kN/volt.<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) Some of you have reported that the ratio of the two strains in the torsion test is not -1. While the cause for this error has not been identified, &nbsp;please just use Equation (7) in your report to evaluate the shear modulus, noting that Equation (6) may not be satisfied by your data.</span><span class="style11"><br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></font><span style="COLOR: windowtext"><span class="style23"> Equation (6): </span><font size="2"> <span class="style18"><em><strong>e</strong></em></span><sub><span class="style11"><strong>45</strong></span><span class="style16"><strong>"</strong></span></sub></font><span class="style17"><strong>=-</strong></span><font size="2"><span class="style11"><span class="style18"><em><strong>e</strong></em></span><sub><strong>135</strong></sub></span><sub><span class="style19"><strong>"</strong></span></sub><span class="style17"><strong>=</strong></span><span class="style18"><strong>g</strong></span><span class="style17"><strong>/2</strong><br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></font> <span class="style23">Equation (7): </span><font size="2"><span class="style17"> <span class="style11"> <span class="style18"><em><strong>g=e</strong></em></span></span><sub><span class="style11"><strong>45</strong><span class="style20"><strong>"</strong></span></span></sub><span class="style11">-<span class="style18"><em><strong>e</strong></em></span><sub><span class="style2"><strong>135</strong></span><span class="style16">"</span></sub></span></span></font></span></li> <li class="style7"><font size="2">21/10/2009:<strong> </strong> <span class="style21">Due to the misunderstanding of experimental equipment setting, the channels of the strain gages for the tension test should be corrected:<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) The channel for the </span> <span class="style11"> <strong>extensional</strong></span><span class="style21"> strain gage should be<strong> </strong></span><strong> <span class="style11">#105</span></strong><span class="style21">;<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) The channel for the </span> <strong> <span class="style11">lateral</span><span class="style21"> </span> </strong> <span class="style21">strain gage should be </span> <span class="style11"> <strong>#106</strong>.</span></font></li> <li class="style7">16/10/2009: <a href="hw_2009.htm"><strong>Homework #</strong><span class="style3">6</span></a><font size="2"> is now posted</font></li> <li class="style7">16/10/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #5<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">14/10/2009: <span class="style14">Every student need to submit an <strong>individual</strong> lab report.</span></li> <li class="style7">09/10/2009: <a href="hw_2009.htm"><strong>Homework #</strong><span class="style3"><strong>5</strong></span></a><font size="2"> is now posted.</font></li> <li class="style7">09/10/2009: <strong> <span class="style8"> <a href="hw_sols_2009.htm"> Homework #4<font size="2"> Solution</font></a></span></strong><span class="style14"> is now posted.</span></li> <li class="style7">05/10/2009: <span class="style14">TA (Glareh Azadi) office on Mondays is updated as &quot; </span> <span class="style11"><strong>102 B&amp;H Basement (Prince Lab)</strong></span><span class="style14"> &quot;.</span></li> <li class="style7">03/10/2009: PDF file of<strong> </strong> Homework #4<font size="2"> posted early has a typo: in Problem 2.87, &quot; </font><strong> <span class="style11">G=120MPa</span></strong><font size="2"> &quot; should be &quot; </font><span class="style11"><strong>G=12</strong></span><span class="style2"><strong><span class="style13">MPa</span></strong></span><font size="2"> &quot;. The corrected <a href="HW_Sol_2009/HW42009.pdf"><strong>PDF file of Homework #</strong><span class="style3">4</span></a> is now posted.</font></li> <li class="style7">02/10/2009: <a href="hw_2009.htm"><strong>Homework #</strong><span class="style3"><strong>4</strong></span></a><font size="2"> is now posted.</font></li> <li class="style7">02/10/2009: <a href="hw_sols_2009.htm"><strong>Homework #3<font size="2"> Solution</font></strong></a><font size="2"> is now posted.</font></li> <li class="style7">02/10/2009: Information for Midterm: in class, open book/note on Wednesday, October 28. You can bring the textbook and any material distributed to the class, e.g. lecture slides/notes, homework solutions.</li> <li class="style7">02/10/2009: <font size="2">Lab 1 sign-up sheet posted on the door of BH 610. Lab 1 due on October 23 (on the bin outside BH 610).</font></li> <li class="style7">30/09/2009: <font size="2"> Some typos are corrected here: (1) In last line of Section 2 of handout for Lab 1, &quot;</font><span class="style11"><strong> the slop of </strong><em> <strong>T</strong></em><strong> versus</strong></span><font size="2"> </font><span class="style11"><strong>(</strong></span><font size="2"><span class="style9"><strong>p</strong></span></font><span class="style11"><strong><em>r</em><sup>3</strong></sup></span><strong><span class="style11">/2)</span></strong><span class="style11"><em><strong>r</strong></em></span><font size="2"> &quot; should be &quot;<span class="style11"><strong> (</strong></span><span class="style9"><strong>p</strong></span><span class="style11"><strong><em>r</em><sup>3</sup></strong></span><strong><span class="style11">/2)</span></strong><span class="style12"><strong><em>g </em></strong></span>&quot;;<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (2) In Problem 2.50 of textbook, &quot;</font><strong><span class="style12"> a</span><span class="style11"><sub>s</sub>=11.7Ê%10<sup>-6</sup>/"</span></strong><span class="style11"><strong>F</strong></span><font size="2"> &quot; should be &quot;<strong><span class="style12"> a</span><span class="style11"><sub>s</sub>=11.7Ê%10<sup>-6</sup>/"</span></strong><span class="style11"><strong>C </strong></span>&quot;.</font></li> <li class="style7">30/09/2009: <a href="labinfo-06.htm"><strong>L<span class="style3">ab1 Information</span></strong></a><font size="2"> is now posted.</font></li> <li class="style7">25/09/2009: <strong><a href="hw_2009.htm">Homework #3</a></strong><font size="2"> is now posted.</font></li> <li class="style7">25/09/2009: <a href="hw_sols_2009.htm"><strong>Homework #2</strong><strong><font size="2"> Solution</font></strong></a><font size="2"> is now posted.</font></li> <li class="style7">24/09/2009: <a href="HW_Sol_2009/HW22009.pdf"><strong>PDF file of Homework #2</strong></a> is now uploaded for convenience.</li> <li class="style7">18/09/2009: <a href="hw_sols_2009.htm"><strong>Homework #1</strong><font size="2"><strong> Solution</strong></font></a><font size="2"> is now posted.</font></li> <li><span class="style7">18/09/2009: </span><a href="hw_2009.htm"> <span class="style7"><strong>Homework #2</strong></span></a><font size="2"><span class="style7"> is now posted.</span></font></li> <li><span class="style7">11/09/2009: </span><a href="en31-06/general%20info.htm"><strong><span class="style7">T</span><span class="style3"><span class="style7">A office hours</span></span></strong></a><font size="2"><span class="style7"> is now announced.</span></font></li> <li><span class="style7">11/09/2009: </span><a href="hw_2009.htm"> <strong><span class="style7">Homework #1</span></strong></a><font size="2"><span class="style7"> is now posted.</span></font></li> --> <!-- <li><span class="style7">12/15/2010: <font size="+2"><font color="#FF0000"> The room of final exam is BH168, and the time is from 2pm to 5:30pm (12/15/2010) </font></font></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/10/2010: Graded Design Project Reports and HW#10 have been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/08/2010: Rassin will review the course and give some examples relative to the final exam in the sections on Thursday</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: There is a typo in the Design Project handout. Equation 14 should be wn< w/sqrt(2)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: Solutions of Practice Problems are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: Solutions of HW#10 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: Please prepare a brief presentation (ppt if you prefer) to explain how you arrived at the final design</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: Design Project Demonstration will start at 8:30am on Wednesday 12/08/2010 (<a href="Final Design Test Schedule.pdf">Design Demonstration Schedule</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: Final Exam Information (<a href="finalexam.pdf">Final Exam Information</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/06/2010: Peak to peak amplitude will be measured in all directions and shouldn't exceed 1 inch under all frequencies</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/02/2010: The Laser Pointer is at the top of the tool cart in the Prince Lab. Work on the project should be carried out on three tables close to the driller in the Prince Lab</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/02/2010: Each design team is only required to produce a written report. You DONOT need to produce a HTML report</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/01/2010: Preliminary design reports have been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/01/2010: Graded Lab Report#2 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/01/2010: Graded Homework#9 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/01/2010: Solutions of HW#9 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/01/2010: Class Notes (<a href="11_energy_methods_3.pdf">Energy Method_3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/30/2010: For Design Project: you can construct your design anytime in the Prince lab, but no later than 5pm everyday</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/29/2010: NO class on Friday (12/03/2010). Prof. Shenoy will discuss the format of the final exam on Monday (12/06/2010)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/29/2010: Class Notes (<a href="11_energy_methods_2.pdf">Energy Method_2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/26/2010: Class Notes (<a href="11_energy_methods_1.pdf">Energy Method_1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/19/2010: Practice problems for the final exam (DONOT turn them in):10.22, 11.24,11.89,11.91,11.110(<a href="PracticeSols.pdf">Practice Problem Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/19/2010: Homework#10 (<b>Due on Friday 12/03/10 at 1pm</b>) (<a href="Homework10.pdf">Homework#10</a>)(<a href="HW10Sols.pdf">Homework#10 Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/18/2010: Sample for Design Project (<a href="2009 Design Project.pdf">2009 Design Project</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/18/2010: Graded Homework#8 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/18/2010: Solutions of HW#8 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/17/2010: Two Spots Open in Chelse's Design Group, please contact Chelsea Macco(chelsea_macco@brown.edu)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/16/2010: Information for finding Design Group members (<a href="ENGN31 Student Names.pdf">All Student Names</a>) (<a href="design-group.pdf">Current Design Groups</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/16/2010: Class Notes (<a href="10_columns.pdf">Columns</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/12/2010: Homework#9 (<b>Due on Friday 11/19/10 at 1pm</b>) (<a href="Homework9.pdf">Homework#9</a>)(<a href="HW9Sols.pdf">Homework#9 Solutions)</a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/12/2010: Class Notes (<a href="9_1_beam_deflection_2.pdf">Beam Deflection_2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/11/2010: Important Dates:</span><font size="2"> <span class="style7">.</span></font></li> <li><span class="style7">Wednesday, November 17: Submit names of group members (via email Akbar_Bagri@Brown.edu) and team name on paper before 4pm. Maximum of 6 students per group</span><font size="2"> <span class="style7">.</span></font></li> <li><span class="style7">Wednesday, November 24: Submit preliminary design with drawings</span><font size="2"> <span class="style7">.</span></font></li> <li><span class="style7">Wednesday, December 8: Final demonstration/contest (Prince Lab), final design reports and drawings due</span><font size="2"> <span class="style7">.</span></font></li> <li><span class="style7">11/11/2010: Design Project Informations (<a href="design_2010.pdf">Design_2010</a>) (<a href="DesignProj-11Nov10.pdf">DesignProject PPT</a>) (<a href="tools and supplies.pdf">Tools and Supplies</a>)(<a href="Design Project-Sample.pdf">2009 Sample</a>)</span><font size="2"> <span class="style7">.</span></font></li> <li><span class="style7">11/10/2010: Graded Homework#7 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/10/2010: Solutions of HW#7 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/09/2010: (<a href="Forth Order Method-2.pdf">Forth Order Method 2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/08/2010: Class Notes (<a href="9_1_beam_deflection_1.pdf">Beam Deflection_1</a>) (<a href="Forth_Order_Method.pdf">Forth Order Method</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/05/2010: Homework#8 (<b>Due on Friday 11/12/10 at 1pm</b>) (<a href="Homework8.pdf">Homework#8</a>)(<a href="HW8Sols.pdf">Homework#8 Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/05/2010: Class Notes (<a href="9_1_beam_deflection.pdf">Beam Deflection</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/04/2010: Graded Homework#6 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/04/2010: Solutions of HW#6 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/03/2010: Class Notes (<a href="7_2_stress_transformations_2.pdf">Stress Transformations</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/01/2010: Lab#2 is held on the same location as Lab#1.The individual Lab#2 report is due on Monday 11/15/10 at 1pm</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/01/2010: Lab#2 Instructions (<a href="lab2mod.pdf">Lab#2 Instructions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/30/2010: Graded Lab#1 Reports have been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/29/2010: Homework#7 (<b>Due on Friday 11/05/10 at 1pm</b>) (<a href="Homework7.pdf">Homework#7</a>)(<a href="HW7Sols.pdf">HW#7 Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/27/2010: Midterm Solutions (<a href="MidtermSols.pdf">MidtermSols</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/26/2010: Choose your Lab#2 time slot and SIGN your name at the sign-up sheet (posted next to the HW drop box) before 1pm on Friday 10/29/10. There are 12 time slots and maximum 7 students per time slot (<a href="lab 2 signup.pdf">Lab#2 Schedule</a>) </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/26/2010: Midterm Score Histogram</span><font size="2"><span class="style7">.</span></font></li> <h2 align=center style='text-align:center'> <img src="MidtermHistogram.jpg" width="337" height="303"></h2> <li><span class="style7">10/22/2010: Homework#6 (<b>Due on Friday 10/29/10 at 1pm</b>) (<a href="Homework6.pdf">Homework#6</a>) (<a href="HW6Sols.pdf">HW#6 Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/20/2010: New Solution for Problem 2.114 in the HW#4 (<a href="2-114.pdf">P2-114</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/18/2010: Midterm Information (<a href="mid-term_information.pdf">Midterm Information</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/18/2010: Class Notes (<a href="beams_3.pdf">Beams-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/15/2010: Solutions of HW#5 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/13/2010: Solutions of HW#4 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/13/2010: MidTerm will start at 8:30am on Friday 10/22/10. It covers Chapters 1 ñ 4 (what was covered until 10/06/10 and in homework sets 1 ñ 5)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/12/2010: For calculating error analysis, unless more precise information is known (from the instruments actually used in the lab) about a particular error in the measurement, we shall assume all parameters are known within 1% uncertainty</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/11/2010: One Typo in the Lab#1 Instruction-2 is revised</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/08/2010: Homework#5 (<b>Due on Friday 10/15/10 at 1pm</b>) (<a href="Homework5.pdf">Homework#5</a>) (<a href="HW5Sols.pdf">HW#5 Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/08/2010: Class Notes (<a href="5_beams.pdf">Beams</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/06/2010: Solutions of HW#3 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/06/2010: Graded Homework#3 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/06/2010: Class Notes (<a href="4_2_pure_bending_3.pdf">Pure Bending-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/05/2010: Individual Lab#1 Reports are due on Monday 10/18/10 at 1p</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/04/2010: If you still DONOT sign your name at the lab#1 sign-up sheet, please contact Lab Instructor Hsiao-Mei Wu (hsiao-mei_wu@brown.edu)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/04/2010: Lab#1 Report Information (<a href="EN31_Lab1_Instruction.pdf">Lab#1 Instruction</a>) (<a href="En31 Laboratory 1.pdf">Lab#1Instruction-2</a>)(Revised one Typo 10/11/2010)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/04/2010: Class Notes (<a href="4_2_pure_bending_2.pdf">Pure Bending-2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/01/2010: Homework#4 (<b>Due on Friday 10/08/10 at 1pm</b>) (<a href="Homework4.pdf">Homework#4</a>)(<a href="Hw4Sols-new1.pdf">HW#4 Solutions)</a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/01/2010: Class Notes (<a href="4_1_pure_bending.pdf">Pure Bending</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/01/2010: SIGN your name at the Lab#1 sign-up sheet (posted next to the HW drop box) ASAP</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/01/2010: Lab#1 Report Guidelines (<a href="Lab1-guidelines.pdf">Lab#1 Guidelines</a>) (<a href="ErrorAnalysis.pdf">ErrorAnalysis</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/30/2010: Lab#1 Information: Meeting with the Lab Instructor Hsiao-mei Wu in front of RM210 in the Prince Lab (not the BH210) at your signed lab-time. You need to submit a LAB REPORT after Lab#1</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/30/2010: Solutions of HW#2 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/30/2010: Graded Homework#2 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/29/2010: Class Notes (<a href="3_1_torsion_2.pdf">Torsion-2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/28/2010: Choose your Lab#1 time slot and SIGN your name at the sign-up sheet (posted next to the HW drop box) before 1pm on Friday 10/01/10. There are 12 time slots and maximum 7 students per time slot (<a href="lab 1 signup.pdf">Lab#1 Schedule</a>) </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/26/2010: Homework#3 (Due on Friday 10/01/10 at 1pm) (<a href="Homework3.pdf">Homework#3</a>)(<a href="HW3Sols.pdf">HW#3 Solutions</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/24/2010: Class Notes (<a href="3_1_torsion.pdf">Torsion</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/23/2010: Wednesday Class Notes (<a href="Notes(sep_22).pdf">Elastoplastic</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/22/2010: Solutions of HW#1 are posted</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/22/2010: Graded Homework#1 has been put in a box labeled EN31----Pick-Up (on the top of white cabinet) outside Prof. Shenoy's office (BH604)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/20/2010: Class Notes (<a href="2_axial_loading-4.pdf">Axial_loading-4</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/17/2010: Class Notes (<a href="2_axial_loading-3.pdf">Axial_loading-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/15/2010: Homework#2 (Due on Friday 09/24/10 at 1pm) (<a href="Homework2.pdf">Homework#2</a>) (<a href="HW2Sols.pdf">HW#2 Solutions)</a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/15/2010: Class Notes (<a href="2_axial_loading-2.pdf">Axial_loading-2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/14/2010: Homework#1 will be due on Friday 09/17/10 at 1PM</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/13/2010: Class Notes (<a href="2_axial_loading-1.pdf">Axial_loading-1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/10/2010: Class Notes (<a href="1_introduction-3.pdf">Introduction-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/16/2011: Class Notes (<a href="1_introduction-4.pdf">Introduction-4</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/08/2010: Homework#1 (Due on Friday 09/23/11 at 1pm) (<a href="Homework1.pdf">Homework#1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/08/2010: Homework#1 (Due on Friday 09/23/11 at 1pm) (<a href="Homework1.pdf">Homework#1</a>) (<a href="HW1Sols.pdf">HW#1 Solutions)</a> </span><font size="2"><span class="style7">.</span></font></li> --> <li><span class="style7">12/20/2011: <span style='color:red'> Students can collect their final exams from Peggy in 6th floor of B&H. Peggy will be in her office today (Thursday) until 3 pm and then they close early for the long holiday (<a href="Final_histogram.jpg">Final_histogram</a>) </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/10/2011: <span style='color:red'> Students with permission for extra time to take the exam should report to BH 141 at 11 AM on saturday </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/10/2011: <span style='color:red'> There will be a section this wednesday. It s in B&H 166 on Wed, Dec 14, 1-2 PM </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/09/2011: Information on the final exam: <span style='color:red'> All the TAs will hold office hours at the usual time this week to help students prepare for the exam (<a href="information_finalexam_2011.pdf">Information on the final exam) </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/09/2011: Class Notes (<a href="10_columns.pdf">Columns</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/07/2011: Homework#10 <span style='color:red'> Note: This homework is not due but will be covered on the exam(<a href="Homework10.pdf">Homework#10</a>) (<a href="HW10_Sol.pdf">HW#10 Solutions</a>) </a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">12/02/2011: Homework#9 (Due on Friday 12/09/11 at 1pm) (<a href="Homework9.pdf">Homework#9</a>) (<a href="HW9_Sol.pdf">HW#9 Solutions</a>) </a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/30/2011: Class Notes (<a href="11_energy_methods_2011_2.pdf">Energy methods2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/21/2011: Homework#8 (Due on Friday 12/02/11 at 1pm) <span style='color:red'> Note: Problems 9.68, 9.81, 9.88, 9.91 must be solved using method of superposition. In solution to Prob. 9.24 there is a typo where 18 should read 24 and the final result is 3 kisp instead of 4 kisp(<a href="Homework8.pdf">Homework#8</a>) (<a href="HW8_Sol.pdf">HW#8 Solutions</a>) </a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/21/2011: Class Notes (<a href="11_energy_methods_2011_1.pdf">Energy methods1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/21/2011: <span style='color:red'> Students should sign a statement saying "By affixing our signatures, we affirm that we have all contributed equally to writing of this laboratory report"</span> </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/21/2011: <span style='color:red'> Students can collect their exams from Peggy in 6th floor of B&H (<a href="Midterm2_histogram.jpg">Midterm2_histogram</a>) (<a href="Midterm2_Sol.pdf">Midterm2 Solution</a>) </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/16/2011: Class Notes (<a href="9_beam_deflection_2.pdf">Beam_deflection4</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/14/2011: Class Notes (<a href="Forth_Order_Method-2.pdf">Beam_deflection3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/14/2011: <span style='color:red'> There is no final design project this semester</span> </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/08/2011: Homework#7 (Due on Friday 11/18/11 at 1pm) (<a href="Homework7.pdf">Homework#7</a>) (<a href="HW7_Sol.pdf">HW#7 Solutions</a>) </a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/08/2011: Class Notes (<a href="Forth_Order_Method-1.pdf">Beam_deflection2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/08/2011: Information on the midterm#2 exam: <span style='color:red'> Students who want extra time for Misterm2 exam should arrive B&H 751 at 8:30 AM</span> (<a href="informationontheexam.pdf">Information on the midterm#2) </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">11/06/2011: Class Notes (<a href="9_beam_deflection_1.pdf">Beam_deflection1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/31/2011: Lab#2 <span style='color:red'> Students who did not do the lab2 can get in touch with Professor Shenoy</span> </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/31/2011: Lab#2 <span style='color:red'> Students could meet Michael in Prince lab</span> (<a href="lab2mod.pdf">EN31_Lab#2 handout) </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/31/2011: Class Notes (<a href="5_beams.pdf">Beams</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/28/2011: Homework#6 (Due on Friday 11/04/11 at 1pm) (<a href="Homework6.pdf">Homework#6</a>) (<a href="HW6_Sol.pdf">HW#6 Solutions</a>)</a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/28/2011: Class Notes (<a href="4_purebending2.pdf">Pure_Bending2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/26/2011: Class Notes (<a href="4_purebending1.pdf">Pure_Bending1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/24/2011: Class Notes (<a href="7_pressurevessels.pdf">Pressure_vessels</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/24/2011: Students can collect their exams from Peggy in 6th floor of B&H (<a href="Midterm1_histogram.jpg">Midterm1_histogram</a>) (<a href="Midterm1-Key.pdf">Midterm1_Solution</a>) </a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/24/2011: <span style='color:red'> Please sign up for lab 2 (groups of 6-7) -- sign up sheet is near the homework drop off box </span></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/21/2011: Homework#5 (Due on Friday 10/28/11 at 1pm) (<a href="Homework5.pdf">Homework#5</a>) (<a href="HW5_Sol.pdf">HW#5 Solutions</a>) </a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/17/2011: Class Notes (<a href="7_stress_transformation-1.pdf">Stress_Transformation-1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/16/2011: <span style='color:red'> Important information on the lab#1 report: For calculating error analysis, unless more precise information is known (from the instruments actually used in the lab), about a particular error in the measurement, we shall assume all parameters are known within 1% uncertainty. </span> </a> </span><font size="2"><span class="style7"></span></font></li> <li><span class="style7">10/12/2011: Homework#4 (Due on Friday 10/21/11 at 1pm) <span style='color:red'> Note: There are typos in solution of Problem 3.36 parts (a) and (b) where it must be pi/2 instead of pi/4 in equations for J_BC and J_CD </span> (<a href="Homework4.pdf">Homework#4</a>) (<a href="HW4_Sol.pdf">HW#4 Solutions) </a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/12/2011: Class Notes (<a href="Torsion_4.pdf">Torsion-4</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/12/2011: <span style='color:red'> Midterm 1: Important information on the midterm exam </span> (<a href="midterm1.pdf">Midterm#1</a>)</a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/07/2011: Class Notes (<a href="Torsion_3.pdf">Torsion-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/05/2011: Class Notes (<a href="Torsion_2.pdf">Torsion-2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">10/03/2011: Class Notes (<a href="Torsion_1.pdf">Torsion-1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/30/2011: Class Notes (<a href="axial-5.pdf">Axial-5</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/29/2011: Homework#3 (Due on Friday 10/07/11 at 1pm) (<a href="Homework3.pdf">Homework#3</a>) (<a href="HW3_Sol.pdf">HW#3 Solutions)</a></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/28/2011: Class Notes (<a href="Axial_4.pdf">Axial-4</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/28/2011: Lab#1 <span style='color:red'>(students only need to submit one lab report per group. The lab will be given in the first floor of Prince Lab. Students could meet me in front of the RM 210 (first floor). Please use the updated files posted here)</span> (<a href="EN31_Lab1.pdf">EN31_Lab#1</a>) (<a href="EN31_Lab1_Instruction.pdf">Instruction of EN31_Lab#1)</a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/26/2011: Class Notes (<a href="2_axial_3_2011.pdf">Axial-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/26/2011: <span style='color:red'> Sign up for lab -­ sign up sheets posted outside BH 604 (near the hw drop off box) -­ groups of upto 6 </span></span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/23/2011: Class Notes (<a href="2_axial_2_2011.pdf">Axial-2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/23/2011: Homework#2 (Due on Friday 09/30/11 at 1pm) (<a href="Homework2.pdf">Homework#2</a>) (<a href="Homework2_sol.pdf">HW#2 Solutions)</a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/21/2011: Class Notes (<a href="2_axial_2011.pdf">Axial-1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/19/2011: Class Notes (<a href="1_introduction-5.pdf">Introduction-5</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/08/2011: Homework#1 (Due on Friday 09/23/11 at 1pm) (<a href="Homework1.pdf">Homework#1</a>) (<a href="Homework1_sol.pdf">HW#1 Solutions)</a> </span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/16/2011: Class Notes (<a href="1_introduction-4.pdf">Introduction-4</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/14/2011: Class Notes (<a href="1_introduction-3.pdf">Introduction-3</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/12/2011: Class Notes (<a href="1_introduction-2.pdf">Introduction-2</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/09/2011: Class Notes (<a href="1_introduction-1.pdf">Introduction-1</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/07/2011: NO sections and office hours this week</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/07/2011: Class Notes (<a href="introduction.pdf">Introduction</a>)</span><font size="2"><span class="style7">.</span></font></li> <li><span class="style7">09/01/2011: Welcome to class</span><font size="2"><span class="style7">.</span></font></li> </ul> <p>&nbsp;</p> <p>&nbsp;</p> <p><img border=0 id="_x0000_i1034" src=mailbox.gif width="29" height="34"><b>Mail any comments or suggestions to <a href="mailto:Akbar_Bagri@brown.edu">the webmaster</a>.</b> </p> </div> </body> </html>