刚粘塑性强化球形薄壳在撞击体作用下的大变形动力分析  

DYNAMIC ANALYSIS OF LARGE DEFORMATION FOR RIGID-VISCOPLASTIC HARDENING SPHERICAL SHELLS BEING IMPACTED BY A MISSILE

作　　者：宁建国[1] 杨桂通[1] 

机构地区：[1]北京大学,太原工业大学

出　　处：《固体力学学报》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

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.

关 键 词：冲击 变形 圆球壳 薄壳 结构力学 

分 类 号：O342[理学—固体力学]