Plastic deformation pressure is the pressure caused by changing the status of rock from elasticity into plasticity.

塑性形变压力是岩石由弹性状态转变为塑性状态所产生的压力。

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The soft rock is a complex rock mechanics medium, which has salience plastic deformation in special environment.

软岩是一种特定环境下的具有显著塑性变形的复杂岩石力学介质。

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Moreover, the irreversible plastic deformation of rock increased, and at the same time, the fracture deformation of rock gradually increased, which was produced by cyclic load.

岩石的不可逆塑性变形随动应变增加而增大，同时由循环荷载引起的损伤变形也逐渐增加。

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