Nonlocal Microdamage Constitutive Model for High Energy Impacts

摘要: During highly dynamic and ballistic loading processes, large inelastic deformation associated with high strain rates leads, for a broad class of heterogeneous materials, to degradation failure by localized damage fracture. However, as soon material dominates process, the increasingly displays softening finite element predictions response are considerably affected mesh size. This gives rise non-physical description behavior mesh-dependent limit velocities that may mislead design ballistic-resistant materials. study is concerned development numerical implementation novel coupled thermo-hypoelasto-viscoplastic thermoviscodamage constitutive model within laws thermodynamics in which an intrinsic length scale parameter incorporated through nonlocal gradient-dependent approach. It shown simulating plugging penetration high-strength steel targets blunt projectiles plays role localization limiter allowing one obtain meaningful values velocity independent density. Therefore, proposed leads improvement modeling simulation impact related problems.