茂木清夫教授,从1960年开始致力于岩石的三轴压缩实验的研究.经过近十年的努力,对Von Karman型普通三轴压缩仪进行了重要的改进,并研制成功了世界上第一台岩石真三轴仪.它能够在均匀的真三轴应力状态下研究岩石的力学特性.从1971年开始,陆续发表了许多有关岩石在真三轴应力状态下的变形和破坏方面的专著,特别是关于中间主应力效 Prof. Momoki Tsugaru, who has been working on rock triaxial compression experiments since 1960. After nearly ten years of hard work, he has made important improvements to the Von Karman type triaxial compressor, and successfully developed the world’s first True triaxial rock instrument. It can study the mechanical properties of rock under uniform true triaxial stress state. Since 1971, it has published many monographs on the deformation and damage of rocks in true triaxial stress states. Is about intermediate principal stress effects