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1.屈曲引论在外力作用下物体失稳发生屈曲的过程,实质上是外力在物体中所建立的势垒发生崩溃而重建新的势垒达到新的平衡的过程。物体失稳发生屈曲的瞬间不消耗能量,仅发生能量转换。即原来贮于体积形变的能量转换为物体形状改变所贮的能量。如不考虑物体最终的体积形变,则外力最初压缩物体所做的功相当于外力改变物体形状所做的功。使薄壳发生屈曲的外功可定义如下:
1. Buckling Introduction The process of buckling of an object under instability caused by external forces is essentially the process of external forces breaking down the potential barrier established in an object and rebuilding a new potential barrier to reach a new equilibrium. Buckling moment instability does not consume energy, only the energy conversion occurs. That is, the energy originally stored in the volume is transformed into the energy stored in the shape of the object. If we do not consider the ultimate volume deformation of an object, the work that the external force initially compresses will be equivalent to the work done by the external force to change the shape of the object. The external work that buckles the shell can be defined as follows: