Evaluation of heat exchange at the front of comminution and compaction of the fractured material with the material adjacent to it in the modelof spherical cavity expansion

Abstract

An approximate model of heat exchange in the material near the front of comminution and compaction of the fractured material formed during the penetration of a long high-velocity projectile into a brittle material is presented. The model is based on the model of expansion of the spherical cavity and the relations determining the temperature jump at the front associated with a pressure jump. The model makes it possible to clarify the behavior of the target material and take into account the change of its properties with temperature during penetration, increasing the predictive ability of penetration models of Alekseevsky―Tate type. The formulation of the problem, its numerical implementation and calculation scheme are given.