Inhomogeneous deformation in bulk metallic glasses: FEM analysis
作者： JC Li , XW Chen , FL Huang , None
DOI: 10.1016/J.MSEA.2014.10.013
关键词:
摘要: Abstract A modified coupled thermo-mechanical 3D constitutive model for bulk metallic glasses (BMGs), which integrates all the effects of free volume, temperature and hydrostatic stress on deformation failure material, is introduced implemented into LS-DYNA commercial software. With considering inhomogeneity microstructure BMGs, FEM geometrical randomly distributed shear-band zones in material established. Then simulations different scenarios, including quasi-static tension, compression, bending as well instrumented anvil-on-rod impact, are conducted, corresponding mechanisms BMGs analyzed. The inhomogeneous especially shear banding behaviors, nucleation propagation bands, banding-induced failure, discussed detail. Related analysis shows that exhibit a significant at room temperature, mechanical behaviors affected by stress. combined with models contain could represent characteristics relatively well.
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