摘要
利用Instron电液伺服材料试验机系统对岩样进行低周疲劳加载,成功获得了中等应变速率,并通过施加不同的加载波形和动载频率,得到了各加载波形和频率下的岩石抗拉强度和应变率响应及其变化规律,拓展了中等应变速率下的实验范围。
The dynamical Brazilian test under intermediate strain rate are usually conducted in laboratory. In this paper, three wave forms in fatigue loading are adopted in experiments to obtain required loading speed with intermediate strain rate. The influence of loading waves on the dynamic tensile strength and average strain rate of rock have been investigated, the intermediate strain rate varing from 10^-3/s to 10^-2/s has been obtained using fatigue loading procedure with three different wave forms （ triangle, sine and square wave forms ）. The method expands the range of intermediate strain rate in experiments and lays the foundation for the study on dynamic constitutive theory of materials.
出处
《土工基础》
2005年第4期51-53,共3页
Soil Engineering and Foundation
基金
湖南省自然科学基金资助项目(项目编号:04JJ6030)
关键词
岩石抗拉强度
加载波形
中等应变速率
动态加载
tensile strength of rock, loading wave, intermediate strain rate, dynamical loading
