加载速率对红砂岩力学效应的试验研究

采用伺服刚性试验机对５４块红砂岩试件进行了９级不同应变加载速率下的单轴压缩室内测试，定量分析了应变速率对材料单轴抗压强度、与峰值强度对应的应变、破坏后的变形模量，以及破裂形式等物理力学性态的影响，按实测数据回归得出的经验公式可用于估算应速率变化剧烈状况下岩石的修正强度和变形量。

Experimental Analysis on the Mechanical Effects of Loading Rates on Red Sandstone

Based on the uniaxial compression testing on 55 red sandstone specimens by the servo-controlled hydraulic testing machine,in which the loading rate is treated as a variable, this paper discusses the strain rate dependent mechanical properties,such as the strength, deformation, mode of failure as well as the post-failure behaviour.The empirical equations obtained by the regression analysis on the observed data can be applied to the evaluation and modification of the characteristics of rock material which is sensible to the strain rate.