水下冲击波载荷作用下气背固支圆板动态毁伤实验  

Failure mode of clamped air-back circular panel subjected to underwater shock loading

作　　者：任鹏[1] 田阿利[1] 张伟[2] 黄威[2] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212000 [2]哈尔滨工业大学高速撞击研究中心,黑龙江哈尔滨150080

出　　处：《爆炸与冲击》2016年第5期617-624,共8页Explosion and Shock Waves

基　　金：国家自然科学基金项目(51509115);江苏省船舶先进设计制造技术重点实验室开放课题项目(CJ1502)

摘　　要：为了研究水下近爆载荷作用下舰艇水下结构的动态变形及失效毁伤模式,利用水下爆炸冲击波等效加载装置结合高速摄影技术,对两种厚度的气背固支5A06铝合金圆板进行了水下冲击波加载实验。得到了气背固支圆板塑性大变形、中心拉伸撕裂和边界剪切破坏3种典型失效模式的动态响应历程。比较分析了冲击波强度、冲击因子、损伤参数和响应参数4种毁伤判据对该类靶板毁伤模式的判别能力。实验结果表明:考虑了结构因素的损伤参数和响应参数能够更为全面的判别结构的失效毁伤情况。In this paper,the dynamic deformation and failure mode of 5A06 aluminum alloy clamped air-backed circular panels with two different thicknesses subjected to underwater shock loading were investigated using the non-explosive underwater shock loading device in combination with high-speed photography.The dynamic response history of the target panels was observed with more information about their failure modes obtained,and three modes of deformation and failure were identified,i.e.Mode I（large plastic deformation）,Mode II（tensile tearing）and Mode III（shear-off failure）.According to the experimental results,the performance of four kinds of failure criteria（i.e.shock wave pressure,impulsive factor,damage parameter,and response parameter）on predicting the failure modes of the target panels was compared and analyzed.The experimental results showed that the damage and failure of underwater structures can be more comprehensively judged by taking account of the damage parameter and the response parameter of the target.

关 键 词：固体力学 水下冲击波 气背圆板 动态毁伤 失效准则 

分 类 号：O347.3[理学—固体力学]