COMPARISON OF SLIDING CRACK MODELS FOR ROCK-LIKE MATERIALS
COMPARISON OF SLIDING CRACK MODELS FOR ROCK-LIKE MATERIALS
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发表时间：
2007
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通讯作者：
Yang Chunhe
中科院分区：
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作者：
Yang Chunhe
滑动裂纹模型在岩石类材料的损伤断裂分析中得到了广泛的应用。系统地考虑了主裂纹方向、翼裂纹方向、围压和无因次翼裂纹长度的影响，比较了6种典型的I型应力强度因子计算模型。此外，对于翼裂纹沿主压应力方向排列的情况，进行了有限元分析。将有限元计算结果与6种理论模型的结果进行了比较，发现其中3种模型都能得到理想的结果，其中1种模型只能在单轴载荷下使用。而其他两种模型的计算结果与有限元计算结果有较大差异，这些结论对进一步研究岩石类材料的损伤和断裂问题具有一定的参考价值。
The sliding crack model has been widely applied in the damage and fracture analysis of the rock-like materials.Considering systematically the influence of the main crack direction,winged crack direction,confining pressure and the dimensionless winged crack length,six typical calculating models for I-model stress intensity factors are compared.What′s more,for the case where the winged cracks are aligned in the direction of the principal compressive stress,a finite element analysis is carried out.Comparing the results of finite element method and those of six theoretical models,it is concluded that three models among are able to get perfect results,and one model is useable only under uniaxial loading,while the results of the other two models are obviously different from FEM results.These conclusions would be useful for the further study of damage and fracture of the rock-like materials.