采矿与安全工程学报2013，Vol.30Issue(1)：93-99,7.
相似材料单轴压缩力学性能及强度误差来源分析
Mechanical properties of similar material under uniaxial compression and the strength error sources
摘要
Abstract
In this paper, in order to improve the accuracy of similar simulation experiment, we tested the stress-strain behaviors of similar material specimens with different compositions (sand-plaster, sand-cement-plaster) and proportions by uniaxial compression testing, analyzed the mechanical properties and post-peak failure characteristics, and investigated the error sources during the production of similar material models and testing of specimens. The results show that: 1) The two similar materials both show good elastic-plastic properties in the loading process, thus, they can be used to simulate different rock mass; 2) The post-peak strain-softening processes of the two materials are smooth, and the residual strengths are stable; 3) Due to the insufficient cementation and primary damage of the similar materials, abnormal pressure-relief and stress fluctuations are prone to appear in the loading process, and the main failure modes are the tensile failures and conjugate shear fracturings; 4) Human factors affect a lot during the production procedures of similar material models, thus, in order to increase the accuracy of similar material experiment, we put forward the error sources in the preparation and test processes and try to avoid them.关键词
相似材料/单轴压缩/力学性能/误差来源Key words
similar material/ uniaxial compression/ mechanical property/ error source分类
矿业与冶金引用本文复制引用
洛锋,杨本生,郝彬彬,孙利辉,付明明..相似材料单轴压缩力学性能及强度误差来源分析[J].采矿与安全工程学报,2013,30(1):93-99,7.基金项目
国家自然科学基金项目(51174070) （51174070）
河北省自然科学基金项目(E2011402046) （E2011402046）
