Yield or martensitic phase transformation conditions and dissipation functions for isotropic, pressure-insensitive alloys exhibiting SD effect

摘要: A class of nonsingular yield conditions depending on three parameters is analyzed for isotropic materials exhibiting strength differential effect and pressure insensitivity. The condition can then be expressed in terms the second third stress deviator invariants. convexity requirement considered constraints imposed material are discussed detail. dual dissipation function derived analytical form. applied analysis high alloys (such as Inconnel 718) or shape memory NiTi, NiAl, CuZnGa, CuAlNi) order to specify onset yield, martensitic austenitic transformation. easily generalized account mixed hardening back anisotropy. Some experimental data provided verify proposed conditions.