Starting from analyzing the theory of plane stress field, the paper introduced mechanical mode for simple fold and composite structural mode and analyzed the theory of structural fracture.
本文从平面应力场理论分析入手，介绍了简单褶皱的力学模式、复合构造模式，并进行了构造裂缝的理论分析。
The results indicate that the application of the HRR theory is positive only in the plane stress case.
结果表明，仅仅在平面应力的条件下HRR理论的应用是肯定的。
The contact zone width of crane wheel with track is analyzed by plane stress elastic theory.
采用平面应力弹性理论，对吊车车轮与轨道的接触区尺寸进行理论分析。
The numeric calculation of the tide-effective shear stress on the seismic fault plane is a key to the application in the load-unload response ratio theory.
发震断层面上潮汐有效剪切应力增量的数值计算是应用响应比理论的一个关键性基础问题。
Elastic wedge model is used for analysis of excavation of homogeneous slope. On the basis of elastic plane-strain theory and the line folds to add theory, stress field of the excavation is got.
本文采用了弹性理论中的楔形体理论，对均质边坡开挖过程进行了分析，在平面应变问题的基础上结合线性叠加原理得到开挖坡体的应力场。
Elastic wedge model is used for analysis of excavation of homogeneous slope. On the basis of elastic plane-strain theory and the line folds to add theory, stress field of the excavation is got.
本文采用了弹性理论中的楔形体理论，对均质边坡开挖过程进行了分析，在平面应变问题的基础上结合线性叠加原理得到开挖坡体的应力场。
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