摘要
本文研究了在平头圆柱体的冲击下，薄球形壳的动力大变形．通过等度量变换，给出了球壳的变形模态．在Ｐｅｒｚｙｎａ和Ｓｙｍｏｎｄｓ的粘塑性本构模型基础上，设材料服从Ｍｉｓｅｓ屈服条件，并假定弯矩和膜力不耦合．根据刚粘塑性强化材料的变分原理，给出球壳的运动方程．数值结果与实验进行了比较，二者吻合较好．
This paper studies the dynamic behavior of large deformation of spherical shells impacted by a flatnosed missile. By using isometric transformations, the deformation modes are given. On the basis of Perzyna-Symonds viscoplastic constitutive equations, the motion equations of the shells are resulted by rigid-viscoplastic variational principlet(8). A comparison made between the numerical results and experimental ones indicates that the two groups of results are in conformity with each other.
出处
《固体力学学报》
CAS
CSCD
北大核心
1994年第2期111-120,共10页
Chinese Journal of Solid Mechanics
基金
山西省自然科学基金
关键词
冲击
变形
圆球壳
薄壳
结构力学
spherical shell, impact, isometric transformation, rigid-viscoplasticity
