多层抗爆结构冲击响应无网格MPM法分析  

RESPONSE OF MULTI-LAYERED STRUCTURE DUE TO IMPACT LOAD USING MATERIAL POINT METHOD

作　　者：王宇新[1] 陈震[2] 张洪武[1] 孙明[1] 

机构地区：[1]大连理工大学工业装备与结构分析国家重点实验室,辽宁大连116024 [2]美国密苏里大学土木与环境工程系,哥伦比亚652112200

出　　处：《工程力学》2007年第12期186-192,共7页Engineering Mechanics

基　　金：国家自然科学基金资助项目(10402006)

摘　　要：在两层钢板中间夹衬泡沫铝等多孔材料构成多层复合结构被应用于抗爆、抗冲击的结构设计中,能够有效地降低冲击载荷对结构的破坏作用。为了研究多层复合结构的抗爆机理和变形破坏过程,使用材料非线性本构模型和无网格物质点法对在高速冲击载荷作用下各层材料的弹塑性大变形进行数值模拟。MPM法利用了欧拉法和拉格朗日法两者的优点,不仅与网格无关,也避免了有限元法中网格畸变,而且在对涉及多物质分界面的问题计算时,因MPM法的耦合条件自动满足,不需要考虑材料界面的变形和破坏,为计算多层抗爆结构的冲击响应建立了一个有效的无网格法数值模拟平台。The multi-layered structure with porous materials is often applied in the blast/impact-resistant structures. The compound structure that porous aluminum is added to the middle of two steel plates can absorbs impact energy and relieves deformation of materials. To explore theory on the analysis of blast/impact-resistant structures, the material point method and nonlinear constitutive model are adopted to simulate large deformation and fracture of materials under impact load. MPM takes advantage of both Eurlerian and Lagrangian methods, and the material points is independent of mesh. Therefore, remeshing of FEM can be avoided, and coupling condition is automatically satisfied on interface of multiple materials. In this paper, a robust MPM simulation tool is developed and used to solve the response of compound blast/impact-resistant structure under explosion and impact load.

关 键 词：冲击动力学 无网格法 抗爆结构 大变形 多孔材料 

分 类 号：O347.3[理学—固体力学]