An Improved Heat Equation to Model Ductile-to-Brittle Failure Mode Transition at High Strain Rates Using Fully Coupled Thermal-Structural Finite Element Analysis

摘要: In this paper a universal heat equation for fully coupled thermal structural finite element analysis of deformable solids capable predicting ductile-to-brittle failure mode transition at high strain rates is presented. the problem mathematical formulation appropriate measures describing onset and growth ductile total damage generation rate per unit volume to model dissipation-induced heating have been employed, which were extended with equation. The was implemented into code utilizing an improved weak form updated Lagrangian formulation, NoIHKH material cyclic plasticity metals applicable in wide range Jaumann Green-Naghdi co-rotational Cauchy’s stress objective integration. verification showed excellent agreement modelled experiment low rates. Plastic bending cantilever has studied higher A few selected results are presented briefly discussed.