边缘裂缝圆盘砂岩试体III型断裂韧度量测之研究

发布时间：2018-05-29 06:28

  本文选题：砂岩 + 反平面剪力　； 参考：《岩土力学》2016年S1期

【摘要】：针对含边缘裂缝之砂岩试体受反平面剪力情形进行了III型断裂韧度量测试验,搭配相关所推导之理论公式求取砂岩III型断裂韧度。研究试验条件为无围压及单轴荷重加载下进行III型断裂试验,且针对试体受高温后之性质改变为变量条件加以探讨。研究结果表明,以该方式进行III型断裂韧度之量测,为可靠且稳定;砂岩经历温度在200℃前,试体III型断裂韧度会提升,之后呈现下降,到600℃,下降趋于平缓;随着烧结温度的提升,单压强度、动态杨氏模量、动态泊松比与III型断裂韧度皆有下降之趋势,且试体出现熔融样态,表面出现明显微裂纹。
[Abstract]:In this paper, the III mode fracture toughness measurement test is carried out for sandstone samples with edge fractures under antiplane shear force, and the III fracture toughness of sandstone is obtained according to the theoretical formulas derived by correlation. The III mode fracture test was carried out under the condition of no confining pressure and uniaxial loading, and the condition that the properties of the specimen changed into variables after high temperature was discussed. The results show that the measurement of III mode fracture toughness in this way is reliable and stable, and the III fracture toughness of the sample increases before the temperature of 200 鈩，

本文编号：1949845