Fracture Properies of Granite at High Temperature

Zhang Jinghua; Wang Jigtao; Zhao Aiguo

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Fracture Properies of Granite at High Temperature

更新时间：2026-06-25

- Fracture Properies of Granite at High Temperature
- Vol. 8, Issue 4, (1987)
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- Online First：15 June 2017，
  
  Published：1987
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Zhang Jinghua, Wang Jigtao, Zhao Aiguo. Fracture Properies of Granite at High Temperature[J]. 1987, 8(4).
DOI：

Zhang Jinghua, Wang Jigtao, Zhao Aiguo. Fracture Properies of Granite at High Temperature[J]. 1987, 8(4). DOI：

摘要

本文介绍了室温到300℃温度范围内的花岗岩试件的三点弯曲断裂试验和圆柱体试件的单轴压缩试验。给出了花岗岩的断裂韧度 KIC

单轴抗压强度 fp

弹性横量 E 等力学参数随温度和加温速率变化的试验结果。这些试验结果表明

花岗岩以≤2℃/min 的加温速度缓慢加热到150℃时

断裂韧度将取得最大值

它约为室温值的1.14倍

虽然它的单轴抗压强度是随着温度的升高而递减的。另外

还用电镜和光学显徽镜的观察结果说明了温度对花岗岩断裂过程的影响。

Abstract

The testing study of three-point bending uniaxial compression of granite with the temperature from room one to 300℃ is presented in this paper. The fracture toughness Klc

uniaxial compression strength fp

and elastic moduli of granite varying with temperature and temperature rate are given

which shows the maximum fracture toughness of granite is given at 150℃

about 1.14 times of that at room temperature

although the uniaxial compression strength decreases as the temperature increases. The effect pf temperature on fracture process of granite is interpreted with the help of observation from electron and optical microscopes.

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