New implementation of a non-associated flow rule in rate- independent plasticity

摘要: One of the new research fields in plasticity is related to choosing a proper non-associated flow rule (NAFR), instead associated one (AFR), predict experimental results more accurately. The idea current derived from combining von Mises and Tresca criteria places yield plastic potential surfaces rate-independent plasticity. This implemented using backward Euler method non-linear finite element simulation. are compared with data for an internally pressurized thick-walled cylinder it demonstrates that, proposed NAFR plasticity, could be predicted Finally, can said that confirms previous works on rate-dependent (viscoplasticity) steady state conditions.