Use of shock tube to determine the dynamic fracture behavior of engineering materials
Addis Kidane (University of South Carolina), Silas Mallon ()
Eringen Medal Symposium in honor of G. Ravichandran
Wed 10:45 - 12:15
Salomon 001
An experimental method has been developed to investigate the dynamic crack initiation and propagation in engineering materials. The experimental method involves shock tube apparatus and 3D digital image correlation (DIC). The shock tube apparatus allows applying a far field dynamic load in controllable manner. The technique is repeatable and more importantly varying the loading rate is easy. Series of experiments are conducted at different loading rate and specimen geometry. The full field displacement and strain fields near the crack tip are obtained using DIC. The measured data is then used with asymptotic crack tip displacement fields to quantify the relevant fracture parameters. The role of various parameters including the transient effect and specimen geometry is investigated.