From experimental observations it is known that there is a temperature jump at the boundary between the cracked and crushed material during penetration into ceramic and brittle materials. High-energy collision is sometimes accompanied by the light emission, one of the causes of which may be an increase in temperature. The report presents a model predicting the temperature jump at the comminuting and compaction front during penetration of the projectile into ceramic materials. The model is based on the analysis of the stress-strain state of the material during the expansion of a spherical cavity in brittle materials. The main source of the temperature jump is a jump of pressure and shear stresses at the boundary between the region of comminuting (Mescal zone) and cracking region of the material. The model allows estimating the energy loss on heating depending on the parameters of the material within the framework of analytical model.
展开▼
