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对于韧性性能好的材料所制成的结构,在求解时可采用理想弹塑性变形“模型”(图1),在塑性力学中,有一类简单问题,只利用平衡方程和屈服条件便可求出受外载作用物休的应力分量。这类问题称为静定问题。属于这类问题的有:轴对称的厚壁筒、厚壁球、旋转圓盘、旋转圆轴以及圆轴的弹塑性扭转等。由于这类问题的弹性解也比较简单,因而可以得到它的弹塑性解。在求解弹塑性问题的过程
For structures made of materials with good ductility, a “model” of ideal elastic-plastic deformation can be used in the solution (Figure 1). In plastic mechanics, there is a simple problem that can only be solved by using equilibrium equations and yield conditions The stress component that is affected by the external load. This type of problem is called statics. Belong to such problems are: axisymmetric thick-walled tube, thick-walled ball, rotating disc, rotating round shaft and the elastic axis of the torsion and so on. Due to the elastic solution of such problems is relatively simple, so it can get its elastoplastic solution. The process of solving elastoplastic problems