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Cracking behaviours of rock‐like materials containing three preexisting flaws after high‐temperature treatments
Fatigue & Fracture of Engineering Materials & Structures ( IF 3.7 ) Pub Date : 2020-11-08 , DOI: 10.1111/ffe.13382
Xiaoping Zhou 1 , Liang Fu 1 , Hao Cheng 2 , Filippo Berto 3
Affiliation  

The mechanical properties and cracking behaviours of rock‐like materials containing three preexisting flaws after high‐temperature treatments are studied. The temperature variations of 25°C, 70°C and 140°C are chosen to explore the influence of temperature, and the ligament angle variations of 75°, 90° and 105° are chosen to explore the effect of preexisting flaws. The crack initiation and coalescence modes and specimen failure after high‐temperature treatments are recorded by a high‐speed dynamic analysis system. Seven modes of crack initiation and ten types of crack coalescence are recorded in the rock‐like specimens. With an increase in temperature and ligament angle, the mechanical properties such as peak strength, peak strain and crack initiation stress change regularly. Furthermore, the experimental results demonstrate that the temperature has a significant impact on the complete stress–strain curves and cracking behaviours of flawed rock‐like materials.

中文翻译:

高温处理后含有三个已有缺陷的类岩石材料的开裂行为

研究了高温处理后含有三个已存在缺陷的岩石状材料的力学性能和开裂行为。选择25°C,70°C和140°C的温度变化来探讨温度的影响,选择75°,90°和105°的韧带角度变化来探讨预先存在的缺陷的影响。高速动态分析系统记录了高温处理后的裂纹萌生和合并模式以及试样破坏。在岩石样中记录了七种裂纹萌生模式和十种裂纹聚结类型。随着温度和韧带角的增加,诸如峰值强度,峰值应变和裂纹萌生应力的机械性能定期改变。此外,
更新日期:2020-11-08
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