摘要
本文利用解析几何、单元体应力分析及力的平衡原理对三向应力状态图解法的一个结论进行了完善的证明。
In all traditional Text of Machanics of Materials, it always omils the detail proof or derivation for the complicate stress analysis. The authors of the paper work out a new development, ie, the application of Analytical Geometry, Infinitimal Element Stress Analysis and the principle of force equilibrium etc, to carry out a more perfect proof.
关键词
主应力
主平面
应力圆
材料力学
Principle-stress, Principle-plane, Derection—cos
