Volume 2, 2009DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
|Page(s)||1657 - 1661|
|Published online||15 September 2009|
On determination of spall strength under dynamic tensile loadingP. Xiao-Yang, L. Ping and H. Hong-Liang
National key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, CAEP, 621900 Mianyang, China
Published online: 15 September 2009
Numerical investigation of spallation has been conducted on three types of steel (HR-2, 2169 and 45) with a damage function model. Model parameters were calibrated by numerical simulation with experimental data. We have determined the spall strength with three kinds of methods, i.e., 1) determined from the acoustical approximation; 2) the theoretical computation from trinomial equation of state; 3) by the numerical simulation of the maximum tensile stress on the spall plane. Results suggest that the spall strength determined by the numerical simulation is reasonable, whereas the traditional acoustic calculation of the spall strength needs to take account of the stress relaxation due to the damage on the spall zone.
© EDP Sciences 2009