A Numerical Study on effect of Strain Rate and Temperature in the Taylor Rod Impact Problem
Study of impact problems has important applications in the branch of engineering. In impact problems, the primary design objective is to ensure that the engineering structures do not fail catastrophically when subjected to short duration impact loads. Due to impact, high magnitude of stress waves travel inside the continuum. Material experiences large plastic strain and high temperature rise on the impacting face. A three-dimensional, large deformation, thermo-elasto-plastic, dynamic, contact, finite element formulation is developed to study the effect of strain rate and temperature on the deformation and stress fields in the Taylor rod impact problem. It is found that the equivalent plastic strain gets over-predicted to a significant extent if the effect of the strain rate is not included in the formulation.