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首页> 外文期刊>Mechanics research communications >A microcrack damage model for brittle rocks under uniaxial compression
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A microcrack damage model for brittle rocks under uniaxial compression

机译:单轴压缩下脆性岩石的微裂纹损伤模型

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摘要

A microcrack damage model for brittle rocks under uniaxial compression is presented. Based on a supposed random distribution of microcracks, the model incorporates microcrack fracture mechanics, rock damage mechanics, a homogenization method, and the effective elastic modulus of solid materials containing microcracks. Microcracks in rock propagate when the external load reaches a certain level and the mechanical properties of the rock then change. The rate of microcrack propagation increases with the external load until rock macrofailure occurs. Results for Xiangjiaba sandstone and Nuozhadu granite confirm that the damage model can simulate the stress-strain of brittle rocks under uniaxial compression.
机译:提出了脆性岩石单轴压缩下的微裂纹损伤模型。基于假定的微裂纹随机分布,该模型包含了微裂纹的断裂力学,岩石破坏力学,均质化方法以及包含微裂纹的固体材料的有效弹性模量。当外部载荷达到一定水平时,岩石中的微裂纹会传播,然后岩石的机械性能会发生变化。微裂纹的传播速率随着外部载荷的增加而增加,直到发生岩石宏观破坏为止。项家坝砂岩和糯扎渡花岗岩的结果证实了损伤模型可以模拟脆性岩石在单轴压缩下的应力应变。

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