A considerable amount of theoretical and experimental research on strength theory of materials under complex stress state was done in the 20th Century.
在20世纪，关于材料在复杂应力状态下的强度理论进行了大量的理论研究和实验研究工作。
Based on the size effect of structure fracture and the strength theory of fabric bundles, the macro statistical scaling effect of materials is achieved.
从结构破坏的尺寸效应入手，利用纤维束强度理论，得到了材料的宏观统计力学效应。
Based on the micro mechanical feature of materials and the strength theory of fibrous bunchiness, the macro statistical size effect of materials was gained.
从材料的微观力学性质入手，用纤维束强度理论，得到了材料的宏观统计力学效应。
Researching from micro mechanical feature of materials and using the strength theory of fabric bundles, we gain the statistical scaling effect of material in normal scale.
从材料的微观力学性质入手，利用纤维束强度理论，得到材料的宏观统计力学效应。
The strength analysis and calculation have been achieved by use of the linear elastic theory, elastic theory of 3 dimension orthotropic materials and relevant strength criterion.
采用弹性力学理论及正交各向异性材料三维弹性理论，利用相应的强度准则对复合层合管进行强度分析计算。
This paper sets up a strength theory of predicting failure of materials using double factor assumption "."
本文使用‘双因素假设’建立了一个预测材料破坏的强度理论。
This paper sets up a strength theory of predicting failure of materials using double factor assumption "."
本文使用‘双因素假设’建立了一个预测材料破坏的强度理论。
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