在y轴正向施加几何位移后为什么在轴向压力作用下位移反而向下
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pldisp,2 楼主的解答是正确的，按照材料力学的压杆稳定理论出现了位移是因为你的力达到了临界载荷，按一端固定一端自由的临界压力为 Fcr=pi*pi*E*I/(4L*L) 其中pi=3.1415926...
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