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多裂隙类岩石材料压缩时的断裂与损伤演化

Fracture and Damage Evolution of Multiple-Fractured Rock-like Material Subjected to Compression.

作者信息

Liu Taoying, Cui Mengyuan, Li Qing, Yang Shan, Yu Zhanfu, Sheng Yeshan, Cao Ping, Zhou Keping

机构信息

School of Resources & Safety Engineering, Central South University, Changsha 410083, China.

China Railway Construction Group Corporation Limited, Beijing 100040, China.

出版信息

Materials (Basel). 2022 Jun 18;15(12):4326. doi: 10.3390/ma15124326.

DOI:10.3390/ma15124326
PMID:35744384
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9229191/
Abstract

Multiple compression tests on rock-like samples of pre-existing cracks with different geometries were conducted to investigate the strength properties and crack propagation behavior considering multi-crack interactions. The progressive failure process of the specimens was segmented into four categories and seven coalescence modes were identified due to different crack propagation mechanisms. Ultimately, a mechanical model of the multi-crack rock mass was proposed to investigate the gradual fracture and damage evolution traits of the multi-crack rock on the basis of exploring the law of the compression-shear wing crack initiation and propagation. A comparison between theory and experimental results indicated that the peak strength of the specimens with multiple fractures decreased initially and subsequently increased with the increase in the fissure inclination angles; the peak strength of specimens decreased with the increase in the density of fissure distribution.

摘要

对具有不同几何形状的既有裂隙类岩石样本进行了多次压缩试验，以研究考虑多裂隙相互作用时的强度特性和裂隙扩展行为。由于不同的裂隙扩展机制，将试样的渐进破坏过程分为四类，并识别出七种贯通模式。最终，基于探索压剪翼裂纹起裂和扩展规律，提出了多裂隙岩体的力学模型，以研究多裂隙岩石的渐进断裂和损伤演化特征。理论与试验结果对比表明，多裂隙试样的峰值强度最初降低，随后随裂隙倾角的增加而增加；试样的峰值强度随裂隙分布密度的增加而降低。

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Numerical Studies on the Failure Process of Heterogeneous Brittle Rocks or Rock-Like Materials under Uniaxial Compression.非均质脆性岩石或类岩石材料单轴压缩破坏过程的数值研究
Materials (Basel). 2017 Apr 1;10(4):378. doi: 10.3390/ma10040378.