A comparative study between micro- and macro-mechanical constitutive models developed for complex loading scenarios

作者：Jeong Youngung^*; Barlat Frederic; Tome Carlos N; Wen Wei

来源：International Journal of Plasticity, 2017, 93: 212-228.

DOI：10.1016/j.ijplas.2016.07.015

• Bauschinger effect
• Dislocations
• Yield condition
• Constitutive behavior
• Anisotropic material

Constitutive models developed for simulating plastic response upon strain path changes are combined: 1) a macro-mechanical model based on anisotropic yield function, associated flow rule and distortional hardening using Homogeneous Anisotropic Hardening (HAH) approach; 2) a micro-mechanical model using self-consistent crystal plasticity in conjunction with crystallographic dislocation-density based hardening. The micro mechanical model is employed to probe the yield surface in order to gain the insight required to construct empirical rules appropriate for the macro-mechanical model. Simulation results of the micro-mechanical model under various loading conditions involving strain path changes and different crystallographic textures are presented. The trends captured in the yield surface evolution predicted by the micro-mechanical model were used to validate and improve the empirical rules used in the HAH model.

• 出版日期2017-6