内聚爆炸载荷下热塑性中厚球壳的变形和层裂

Imploding load induced deformation and spallation of thermal-plastic spherical shell of medium thickness

考虑温度和损伤对材料参数的影响,计入温度和损伤对材料塑性变形发展的耦合作用,以本构关系的内变量理论为基础得到了热塑性本构关系的普适显式表达式以及增量形式的热塑性本构方程,结合在实际中有重要意义的内聚爆炸载荷作用下的球壳层裂问题,建立了含损伤热塑性球壳破裂问题的完备方程组,使用有限差分方法,完成了对问题的数值模拟,并对结果进行了分析。

By accounting for the effects of temperature and damage on material parameters and the coupled effects of temperature and damage on the plastic deformation, a general explicit form and a specific incremental form of a thermal-plastic constitutive relation have been obtained based on the internal variable theory. For the problem of imploding load induced spallation in spherical shell, a set of equations have been developed and numerically solved with finite difference method.