Based on the theory of elastic-plastic deformation, according to the finite element method, this paper presents a nonlinear analysis of the distribution of the soil pressure of the ditch conduit.

表明对大型沟埋式管道的上压力，采用弹塑性理论的非线性分析是比较符合实际的，其结果可供设计参考。

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The paper has studied straightening stress and residual deformation of circular shaft by using elastic - plastic theory, deueloped calculation formula of straightening loud in given deflection error.

从弹塑性理论出发以圆截面轴为例对校正应力与残余变形进行了分析研究，提出了在给定弯曲误差下的校正载荷的计算公式。

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According to the deformation of elastic-plastic theory, the finite element analysis model of metal diaphragm for tank of propulsion system in satellite was established in this paper.

根据弹塑性有限变形理论，用有限元法建立了卫星推进系统贮箱金属膜片变形的有限元分析模型。

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