intermediate main stress effect 中间主应力效应
The statistical analysis shows that the intermediate main stress can generally make the maximum main stress increase 30%.
统计分析表明：中间主应力一般可使最大主应力的强度极限增大30%。
The true triaxial pressure experiment for red sand rock is conducted for the purpose of investigation into the strength theory of rock and the effect of intermediate main stress.
为探讨岩石的强度理论和中间主应力效应，进行了红砂岩真三轴压力试验。
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