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Weibull linear parallel bond model (WLPBM) for simulating micro-mechanical characteristics of heterogeneous rocks

机译:用于模拟非均质岩石微力学特征的威布尔线性平行键模型(WLPBM)

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摘要

A Weibull liner parallel bond model (WLPBM) implemented into the two-dimensional particle flow code (PFC2D) is proposed to simulate the mechanical properties of heterogeneous rocks. A continuous parameter calibration strategy associated with the Hoek-Brown strength criterion is performed to determine a series of micro-contact parameters matched with the macro responses observed in laboratory experiments (e.g., uniaxial compression test, direct tension test, and the biaxial compression test). The stress-strain responses, strength characteristics as well as the failure modes under the uniaxial and biaxial compression test are modeled and discussed detailly. The simulation results indicate that the proposed WLPBM provides a promising approach for efficiently studying nonlinear mechanical behaviors, strength characteristics and the corresponding failure modes.
机译:提出了一种在二维颗粒流代码(PFC2D)中实现的威布尔线性平行粘结模型(WLPBM),以模拟非均质岩石的力学性能。执行与Hoek-Brown强度准则相关的连续参数校准策略,以确定一系列与实验室实验(例如,单轴压缩测试,直接拉伸测试和双轴压缩测试)中观察到的宏观响应相匹配的微接触参数。 。对单轴和双轴压缩试验下的应力-应变响应,强度特性以及破坏模式进行了建模和详细讨论。仿真结果表明,所提出的WLPBM为有效研究非线性力学行为,强度特性及相应的失效模式提供了有希望的方法。

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