编制的软件有友好的界面并可用于主应力空间中各种工程材料屈服面和破坏面的模型及计算机辅助教学。
The present users-friendly software can be widely used in establishing the yield and failure surfaces for various engineering materials and the computer aided instruction (CAI).
在此基础上，分析了双轴拉-压极限强度随冻融循环次数的变化规律，并在主应力空间和八面体应力空间建立了同时考虑冻融循环次数和拉压比的破坏准则。
On this basis, the failure criterion of concrete simultaneously considering the freeze-thaw cycle and tension-compression ratio in principle stress space and octahedral space is established.
计算结果表明：中间主应力对构造结构面之间的空间组合规律具有重要影响。
The numerical results showed that the intermediate principal stress weightily affected the spatial combination regularities of different kinds of structure planes.
在应力偏张量主值三角函数解的基础上，推导了应力空间内主应力和主方向的通用解析解公式。
Based on the stress partial tensor's trigonometric function answer, the main stress and main direction are established in parsed currency formula, and some special answers and examples are discussed.
随着中间主应力和最小主应力的增加，空间弱面破坏角度范围具有变小的趋势。
And the spatial failure region becomes smaller with the increased values of the middle and minimum principal stresses.
随着中间主应力和最小主应力的增加，空间弱面破坏角度范围具有变小的趋势。
And the spatial failure region becomes smaller with the increased values of the middle and minimum principal stresses.
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