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受轴向冲击有限长弹性直杆中应力波引起的分叉问题
引用本文:马宏伟,韩强.受轴向冲击有限长弹性直杆中应力波引起的分叉问题[J].爆炸与冲击,1995,15(4):300-306.
作者姓名:马宏伟  韩强
作者单位:太原工业大学应用力学研究所,北京大学
摘    要:研究了有限长理想直杆受阶跃载荷作用的弹性动力屈曲问题。将直杆的屈问题归结为由轴向应力波传播而导致的杆的分叉问题,并考虑了应力波反射的影响。给出了分叉发生的临界条件并对具体实例进行了计算。最后对阶跃载荷及脉冲载荷对杆的动力屈曲的影响进行了讨论。

关 键 词:有限长  应力波  分叉  弹性杆  冲击载荷

BIFURCATION PROBLEM CAUSED BY PROPAGATION OF STRESS IN FINITE LENGTH BAR SUBJECTED TO AXIAL IMPACT
Ma Hongwei,Han Qiang,Zhang Shanyuan,Yang Guitong.BIFURCATION PROBLEM CAUSED BY PROPAGATION OF STRESS IN FINITE LENGTH BAR SUBJECTED TO AXIAL IMPACT[J].Explosion and Shock Waves,1995,15(4):300-306.
Authors:Ma Hongwei  Han Qiang  Zhang Shanyuan  Yang Guitong
Abstract:In this paper,the elastic dynamic buckling problem of a finite length perfect barsubjected to axial step load is studied. The buckling problem of the bar is converted to a bifurca-tion problem caused by propagation of axial stress wave,and the reflective effect of stress wave isconsidered. Thecritical conditions of bifurcation is given and the example of computation is givenalso. At the end,the effects of step load and impulse load on the dynamic buckling of the bar aredisscussed.
Keywords:finite length elastic bar  stress wave  bifurcation
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