Fracture mechanical model is developed by utilizing subcritical crack growth, leading to an equation that has a closed solution for joint cohesion as a function of time.
利用分支裂隙扩展建立断裂力学模型，可导出节理内聚力的一种具有封闭解的时间方程。
Finally the closed solution about the amplitude is obtained from the principle of the minimum potential energy.
最后用势能原理确定该幅值而得到封闭解。
Finally the closed solution about the amplitude is obtained from the principle of the minimum potential energy.
最后用势能原理确定该幅值而得到封闭解。
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