轴向冲击下理想塑性直杆动态屈曲的过应力简化分析模型  

A Simplified Over-Stress Analytical Model of the Dynamic Buckling of a Perfectly Plastic Column under Axial Impact

作　　者：揭敏[1] 

机构地区：[1]华中理工大学力学系

出　　处：《应用数学和力学》1995年第6期569-572,共4页Applied Mathematics and Mechanics

基　　金：华中理工大学青年科学基金

摘　　要：本文在理想塑性直杆的动态屈曲分析中引入应变率效应，得到相应的动力学微分方程，求出了屈曲半波长，临界载荷和屈曲时间的表达式。讨论了应变率效应对杆的塑性动态屈曲的影响。并与文［４］的理论和试验结果作了比较。This paper introduces the strain-rate effects in the analysis of dynamic buckling of a perfectly plastic column . The corresponding differential equation of dynamics is deduced.The expressions of half-wave,length of buckling mode,oritical load and time of buckling are obtained.Discussicn on the strain-rate effect on the plastic dynamic buckling of a column is presented.The results of this paper are compared with those of the theory and experiment in [4].

关 键 词：应变率效应 理想塑性 杆 动态屈曲 载荷 屈曲 

分 类 号：O344.1[理学—固体力学]