Plastic Instability Simulation of Steel in Tension

摘要

Ultimate plastic instability behavior of steel in tension is simulated by using a 3D elasto-plastic bifurcation analysis. In this study, after strictly detecting a bifurcation point and conducting a branch-switching procedure, localized deformations just before shear fracture of members with various width-thickness ratios are analyzed with the J2 flow hardening theory. Excellent correlation is demonstrated between the computational and the experimental results.