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在分析压应力作用下裂纹扩展模型的基础上,指出了目前几种常用的岩石中平面分支裂纹尖端应力强度因子的近似解析式所存在的问题,并给出了应力强度因子的较为简便且合理的近似表达式.
Based on the analysis of the crack growth model under compressive stress, the problems existing in the approximate analytic formulas of the stress intensity factor at the plane branch crack in several commonly used rock are pointed out. The stress intensity factor is given as simple and reasonable The approximate expression.