摘要
为了更好地了解灰岩在循环荷载作用下的力学特性,利用TAW-2000D微机控制电液伺服岩石三轴试验机对灰岩进行单轴循环加卸载试验,研究了灰岩在不同循环加卸载路径作用下的强度、变形特征及破坏模式。结果表明:不同循环加卸载路径对灰岩的抗压强度的影响是各不相同的,且首循环加载载荷大小对灰岩的峰值强度影响较大。
In order to understand the mechanical characteristics of limestone under cyclic loading better, the TAW-2000D computer control electro-hydraulic servo was used for the rock triaxial testing machine. The strength, deformation characteristics and damage evolution process were investigated based on the experiment of limestone samples under the different cyclic loading and unloading paths. The results show that: different cyclic loading and unloading paths have different influence on the compressive strength of limestone, and the first cyclic loading has a much greater influence on the peak strengyh of limestone.
出处
《煤矿机械》
2016年第9期29-31,共3页
Coal Mine Machinery
基金
国家自然科学基金(51264018
51064012)
关键词
循环加卸载
滞回环
变形记忆效应
凯瑟效应
cyclic loading and unloading
hysteresis loop
deformation memory effect
Kaiser effect