材料科学
差示扫描量热法
脆性
热重分析
复合材料
红色砂岩
刚度
机制(生物学)
压力(语言学)
联轴节(管道)
变形(气象学)
热的
地质学
化学
热力学
物理
古生物学
哲学
语言学
有机化学
认识论
作者
Mengxiang Wang,Jiangteng Li,Han Tan,Ju Wang,Zhanming Shi,Kaihui Li
标识
DOI:10.1016/j.ijfatigue.2022.107405
摘要
In this paper, the fatigue characteristics of red sandstone after heat treatment were analyzed from the aspects of stress-strain curve, deformation, energy and damage. Furthermore, the thermal damage mechanism was discussed by X-ray diffraction and thermogravimetric-differential scanning calorimetry synchronous analysis tests. The results showed that 400 °C was the threshold temperature. Below this temperature, the brittleness, failure stress and stiffness of the specimen were enhanced. Otherwise, they were weakened. Mineral decomposition, dehydration and crystal expansion occurred during the heat treatment process. The thermal damage mechanism of red sandstone can be clarified by a competitive mechanism of strengthening and weakening effects.
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