爆炸柱壳动态断裂准则的研究(英文)  

Dynamic Fracture Criteria of Explosive Cylindrical Shells

作　　者：施惠基[1] 高重阳[2] 

机构地区：[1]清华大学工程力学系,北京100084 [2]浙江大学力学系,杭州310027

出　　处：《宁波大学学报（理工版）》2003年第4期336-341,共6页Journal of Ningbo University：Natural Science and Engineering Edition

摘　　要：本文以一种典型的FAE装置为实际研究对象,通过对其薄柱壳在内部爆炸栽荷下的动态膨胀断裂过程进行数值模拟.推导出一种实用的动态断裂准则;且在推导中引入了一个损伤演化方程.准则表明最终的结构破裂取决于与临界损伤变量密切相关的断裂应变.经算例验证,该准则的理论解和数值结果吻合较好.An FAE (Fuel-Air-Explosives) device was used as the actual model in this paper. The dynamic expanding and fracture processes of the thin cylindrical shell under internal explosive loading were simulated numerically to help us develop a new dynamic fracture criterion. A damage evolution equation was introduced in the determination of the dynamic fracture criteria. It is concluded that the final collapse of the structure is decided by the rupture strain that is deduced from the critical damage variable. Hie numerical results and theoretical solutions have been compared and they coincide with each other.

关 键 词：动态断裂准则 有限元模拟 薄柱壳 爆炸载荷 临界损伤变量 断裂应变 

分 类 号：O346.1[理学—固体力学] O38[理学—力学]