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On-line Access: 2023-01-20
Received: 2022-05-02
Revision Accepted: 2022-08-01
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Citations: Bibtex RefMan EndNote GB/T7714
Tian WANG, Jian WANG, Sheng JIANG, Jiahe ZHANG. Numerical investigations of the failure mechanism evolution of rock-like disc specimens containing unfilled or filled flaws[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2200238 @article{title="Numerical investigations of the failure mechanism evolution of rock-like disc specimens containing unfilled or filled flaws", %0 Journal Article TY - JOUR
含填充及未填充裂缝的类岩圆盘试样破坏机制演化的数值研究机构:1河海大学,水利水电学院,中国南京,210098;2悉尼大学,土木工程学院,澳大利亚悉尼,NSW2006 目的:岩石的力学响应和最终破坏模式与破坏机制的演化有关。本文旨在通过光滑粒子流体力学(SPH)方法模拟材料混合破坏行为,探讨含填充及未填充裂缝的类岩圆盘试件加载后的破坏机制演变。 创新点:1.在SPH框架中引入混合破坏模型模拟类岩圆盘试样的破坏行为;2.通过SPH数值模拟方法分析圆盘试样的破坏机制演化过程,研究裂纹聚结和裂缝填充的破坏行为。 方法:1.在SPH框架下,分别采用张拉损伤模型和Drucker-Prager模型计算材料的张拉破坏和剪切破坏;模拟一系列巴西圆盘试样的破坏行为并与试验结果对比,验证所提SPH方法是否可用于模拟岩石的破坏机制演化。2.通过统计分析,研究不同裂缝倾角和材料属性联合作用对试样宏观破坏形态及力学响应的影响。 结论:1.对于含未填充裂缝的圆盘试样,岩桥区裂纹的聚结机制受裂缝倾角和材料性能的组合影响。2.对于含填充裂缝的圆盘试件,当圆盘和填充材料的抗拉强度与粘聚力的比值接近时,试样的张拉损伤的增长速度更快,使得整个试件表现更多的脆性特征。3.随着充填物分布不均匀程度的增加,试样张拉损伤的增长速率降低,且圆盘试样展现出更多的延性特征;当预制裂缝倾角接近45°时,填充物的影响更大。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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