In this work, we propose a modified phase-field model for simulating the evolution of mixed mode fractures and compressive driven fractures in porous artificial rocks. For the purpose of validation, the behaviour of artificial rock samples, with either a single or double saw cuts, under uniaxial plane strain compression has been numerically simulated. The simulated results are compared to experimental data, both qualitatively and quantitatively. It is shown that the proposed model is able to capture the commonly observed propagation pattern of wing cracks emergence followed by secondary cracks driven by compressive stresses. Additionally, the typical types of complex crack patterns observed in experimental tests are successfully reproduced, as well as the critical loads.

在这项工作中，我们提出了一种改进的相场模型，用于模拟多孔人造岩石中混合模式裂缝和压缩驱动裂缝的演化。为了验证的目的，已经对单轴平面应变压缩下人造岩石样品的行为进行了数值模拟，无论是单锯还是双锯。将模拟结果与实验数据进行定性和定量比较。结果表明，所提出的模型能够捕获通常观察到的翼裂纹出现的传播模式，然后是由压缩应力驱动的二次裂纹。此外，在实验测试中观察到的典型类型的复杂裂纹模式被成功再现，以及临界载荷。