落锤冲击下伪弹性TiNi合金固支梁的响应特性研究  

Response of a TiNi end-clamped beam under dropping hammer shock

作　　者：吴会民[1] 汪玉[1,2] 唐志平[1] 

机构地区：[1]中国科学技术大学近代力学系,合肥230027 [2]海军装备研究院,北京100073

出　　处：《振动与冲击》2009年第3期40-45,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(10672158)

摘　　要：主要通过实验并辅以数值计算,对伪弹性TiNi合金固支梁的落锤冲击响应进行了研究,目的是研究相变对结构动态响应的影响。结果表明固支梁在大质量块的低速冲击作用下,由早期的弹性弯曲波动响应,发展到整体结构响应。相变和相变铰的形成,改变了梁的行为,特别是相变的可逆性使梁在卸载后恢复原状,呈现出与传统理想弹塑性梁不同的响应特性。The response of a TiNi alloy end-clamped beam under dropping hammer impact was investigated by employing experimental and numerical methods.The purpose of the study is to explore effect of phase transformation on dynamic behavior of structures.The results showed that under dropping hammer impact the response of the end-clamped beam was elastic flexural wave propagation in the beam during early period and then led to the global structural response.The structural response of the TiNi alloy end-clamped beam was different from that of an ideal elastic-plastic beam due to phase transformation was and phase transformation hinge forming.The recoverable character of the phase transformation made the beam recovers its original shape after unloading.

关 键 词：落锤 TINI合金 固支梁 冲击响应 

分 类 号：O344[理学—固体力学]