Maximum plastic workprinciple is an important theorem for analyzing plastic deformation which is a foundation to calculate deformation force with energy method.
最大塑性功原理又称第二塑性变分原理，在致密体塑性变形分析中是运用能量法进行变形力能计算的基础。
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Based on general principle of the 2nd low of thermodynamics, methods for verifying the "principle of MaximumWork" are summarized and same essential problems in this area are discussed.