高温下花岗岩断裂特性的研究

被引:26
作者
张静华
王靖涛
赵爱国
机构
关键词
断裂韧度; 花岗岩; 酸性岩; 试件; 高温下; 单轴抗压强度; 断裂特性;
D O I
10.16285/j.rsm.1987.04.005
中图分类号
学科分类号
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。
引用
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页码:11 / 16
页数:6
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