Modeling grain boundaries in polycrystals using cohesive elements: Qualitative and quantitative analysis

摘要: Abstract We propose and demonstrate several tests to estimate the performance of cohesive elements in ABAQUS for modeling grain boundaries complex spatial structures such as polycrystalline aggregates. The is checked by comparing computed stresses with theoretically predicted values a homogeneous material under uniaxial tensile loading. Statistical analyses are performed different loading conditions two elasto-plastic models grains: isotropic elasticity hardening plasticity anisotropic crystal plasticity. Tests conducted on an analytical finite element model generated from Voronoi tessellation well realistic stainless steel wire. results highlight issues related computation normal shear stresses. most severe issue found within plastic response where particularly oriented significantly underestimated. Other be topological constraints space result increased scatter