|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Computational Design and Simulation of Materials (CDSM 2018): Meso/Macroscale Simulations
||A Consistent Mesoscale Elastoplastic Phase-field Framework
||Tianle Cheng, Youhai Wen, Jeffrey A. Hawk
|On-Site Speaker (Planned)
By taking traceless inelastic strain as a phase field variable and minimizing the total elastic energy through constrained variational method, we show that the kinetics derived from the time-dependent Ginzburg-Landau (TDGL) type equation can be in line with classical plasticity flow rules. Also, the elastic field surrounding a shear crack is fully determined by equivalent deviatoric eigenstrain in the crack at equilibrium. Our model is further validated by a series of analytical solutions with respect to an expanding spherical inclusion in elastoplastic matrix and the J-integral with respect to a mode I crack. [cf. Cheng T.-L., et al, Int. J. Plas. 2017, https://doi.org/10.1016/j.ijplas.2017.05.006] In addition, a dual-phase system with different isotropic hardening subject to loading-unloading cycles is simulated and the results show that although each individual phase has isotropic hardening, macroscopically the material system responds with Bauschinger type effects.
||Planned: Supplemental Proceedings volume