弹性直杆动态屈曲与后屈曲的实验研究  

EXPERIMENTAL STUDY ON THE IMPACT BUCKLING AND POST BUCKLING OF ELASTIC BARS

作　　者：汤立群[1,2] 朱兆祥[1,2] 

机构地区：[1]华南理工大学 [2]中科院力学所LNM

出　　处：《爆炸与冲击》1998年第2期97-102,共6页Explosion and Shock Waves

基　　金：国家自然科学基金

摘　　要：对传统的霍普金森压杆装置（ＳＨＰＢ）进行改进，用于研究弹性直杆的动态屈曲与后屈曲，并且分析了影响实验精度的因素。实验结果表明，在轴向应力波作用下弹性直杆的动态屈曲临界载荷明显高于静态的，并且在屈曲发生后，在直杆中有弯曲波产生，其波速大约为弹性剪切波的波速。A traditional Split Hopkinson Press Bars (SHPB) device is adjusted and applied to study the impact buckling and postbuckling of elastic bars.The factors affecting the experimental results are analysed in this paper.The experimental results show that the critical buckling load of elastic bars under axial imapct is higher than that in static,a bending wave is observed after buckling takes place,the bending wave propagates along the bar with a velocity of shear stree wave.

关 键 词：屈曲 后屈曲 应力波 直杆 弹性杆 SHPB 

分 类 号：O347.4[理学—固体力学]