综合断裂理论在三维介质中的应用

Application of the Synthetic Fracture Criteria to Three-Dimensional Medium

本文将综合断裂理论应用到研究三维介质复合应力条件下裂缝开裂扩展问题,得到了一个一般性结果。用该结果对Ⅰ—Ⅱ、Ⅰ—Ⅲ、Ⅱ—Ⅲ复合型进行了计算和讨论,现同有的实验结果以及普遍使用的最大周向拉应力理论(〔σ_(?)〕_(max)理论)、最大能量释放率理论(〔G〕_(max)理论)和最小应变能密度因子理论(〔S〕_(min)理论)进行了比较。

In this paper the synthetic fracture criteria has been applied to threedimensional medium. The conditions of the application of the synthetic fracture criteria to the crace extension under combined stress in three-dimensional have been given by the analysis and comparison of the theoretical solutious and the experimental results. The test results under mixed mode Ⅰ-Ⅱ, Ⅰ-Ⅲ and Ⅱ-Ⅲ fracture are compared with the theoretical curves predicted by four difterent fracture criteria.