减载材料对弹载器件抗高过载能力影响研究  

Effect of load relieving material on projectile based equipments against high overload

作　　者：李俊[1,2] 宁全利[1,3] 朱建生[3] 刘闯[3] 

机构地区：[1]解放军陆军军官学院炮兵弹药技术实验室,安徽合肥230031 [2]解放军陆军军官学院二系,安徽合肥230031 [3]解放军陆军军官学院五系,安徽合肥230031

出　　处：《兵器材料科学与工程》2013年第3期7-10,共4页Ordnance Material Science and Engineering

基　　金：国家自然科学基金项目(11172331)

摘　　要：采用基于Total Lagrangian方法的三维黏弹性大变形增量本构关系,运用有限元方法对高过载环境下弹载器件在发射过程中的等效应力进行数值模拟计算。分析减载材料力学特性及减载材料厚度对作用在弹载器件上等效应力的影响。结果表明:选择减载材料应选择泊松比较高的材料及其弹性模量能够使作用在弹载器件上的最大等效应力较低的材料;选择减载材料厚度应考虑既能满足作用在弹载器件上的最大等效应力较低、又能满足任务设备结构设计要求。Three dimensional visco elastic large deformation incremental constitutive equation was derived based on Total Lagrangian method,and the equivalent stress distribution during launching was simulated by finite element method under high load condition for projectile based equipment. The influences of mechanical performances and thickness of load relieving materials on equivalent stress were analyzed. The results show that the materials with higher Poisson’s ratio and with lower maximum equivalent stress should be preferred in choosing materials;lower maximum equivalent stress should be considered in choosing thickness of materials,and the thickness should also meet structure designing specifications of projectile based equipments.

关 键 词：减载材料 弹载器件 高过载 等效应力 

分 类 号：V435.21[航空宇航科学与技术—航空宇航推进理论与工程]