The experimental results show that the failure of specimens will be either hydraulic fracturing or shearing plastic flow, it depends on the initial principal stress ratio.
研究结果表明，在不同起始主应力比条件下，试件可以表现为水力劈裂破坏，也可以为剪切塑流破坏。
2
It is revealed that the shearing Reynolds' stress in the fluid is the driving force of the fluid flow.