Torki Mohammad E, Benzerga A Amine
Department of Aerospace Engineering, Texas A&M University, College Station, TX, 77843, United States.
TEES Center for intelligent Multifunctional Materials and Structures (CiMMS), College Station, TX, 77843, United States.
MethodsX. 2018 Oct 24;5:1431-1439. doi: 10.1016/j.mex.2018.10.018. eCollection 2018.
Micromechanics-based constitutive relations for post-localization analysis are obtained, to be used in a multi-surface representation of porous metal plasticity. Each yield surface involves a number of internal parameters. Hence, the constitutive relations must be closed with evolution equations for the internal parameters. The latter are essential to describing the gradual loss of load-bearing capacity under shear-dominated loading. We also briefly discuss potential void closure due to void rotation and elongation in shear and show additional details regarding the simulations reported in a recent paper (A mechanism of failure in shear bands (2018) Extreme Mechanics Letters, , pp. 67-71.) The method can be more broadly used in a range of ductile failure problems involving combined tension and shear loadings.
获得了基于微观力学的本构关系用于局部化后分析，以用于多孔金属塑性的多表面表示。每个屈服面都包含多个内部参数。因此，本构关系必须通过内部参数的演化方程来封闭。后者对于描述在剪切主导加载下承载能力的逐渐丧失至关重要。我们还简要讨论了由于剪切中空洞旋转和伸长导致的潜在空洞闭合，并展示了近期一篇论文（《剪切带中的破坏机制》（2018年），《极端力学快报》，第67 - 71页）中报道的模拟的更多细节。该方法可更广泛地应用于一系列涉及拉伸和剪切组合加载的延性破坏问题。
