水下爆炸作用下金属材料动态失效判据  

Dynamic Invalidation Criterion of Metallic Material during Underwater Exploison

作　　者：张伦平[1] 严波[1] 潘建强[1] 刘建湖[1] 周章涛[1] 郝轶[1] 

机构地区：[1]中国船舶科学研究中心,江苏无锡214082

出　　处：《噪声与振动控制》2012年第6期54-57,共4页Noise and Vibration Control

摘　　要：对某金属材料制成的圆筒形试件进行水下近距爆炸试验,得到水下近距爆炸条件下材料的动态断裂应变,结合能量方法,给出水下近距爆炸时材料的动态屈服强度,并和静态拉伸试验及霍普金森拉杆试验(SHTB)结果对比,比较屈服强度、极限拉伸应变和能量吸收率等参数,并探讨SHTB试验所得失效判据在水下爆炸条件下的适用性。对比材料失效判据常规研究方法和水下爆炸实际效果,对于船体及其模型的结构抗爆设计和评估具有参考价值。Underwater explosion experiments were conducted for cylinder models made of metallic materials. Based on the experimental data and energy method, the dynamic fracture strain and dynamic yield stress during near underwater explosion were obtained. By comparing the data of the underwater explosion experiments with that of the statics experiments and the SHTB experiments, the difference of yield stress, maximum tensile strain, energy absorbing density, etc. were analyzed. Finally, the applicability of the invalidation criterion from SHTB experiments for underwater explosion was discussed. Failure criterion of the metallic material resulted from the conventional method was compared with the result of actual underwater explosion test. This work is helpful for anti-explosion design and evaluation of ship/model structures.

关 键 词：冲击 水下爆炸 动态失效 材料性能 应变率 

分 类 号：O381[理学—流体力学] O347.1[理学—力学]