Compared with material mechanics method, the process is concise and suitable for computer calculating.
与材料力学方法相比，简化了推导过程，得到了便于微机计算的结论。
Mechanics characteristic for deep-drawing process of panel parts is analysed by upper-bound method.
用上限法分析了覆盖件在拉深过程中的力学特征。
The drawing process of thick wall is a problem of geometry non-linear and material non-linear, so it is very difficult to be solved by the method of elasticity and plastics mechanics.
而厚壁封头冲压成形过程属于几何非线性和材料非线性的问题，很难用弹塑性力学理论的解析法进行研究。
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