泛珠三角地区地质环境综合调查工程进展
黄长生1, 王芳婷2, 黎清华1, 赵信文1, 刘广宁1, 余绍文1, 刘怀庆1, 顾涛1

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HUANG Changsheng1, WANG Fangting2, LI Qinghua1, ZHAO Xinwen1, LIU Guangning1, YU Shaowen1, LIU Huaiqing1, GU Tao1
岩石压力试验应力应变曲线[ 2 ] σ1—比例极限; σ2—弹性极限; σ3—强度极限; σ4—剩余应力; H —应变硬化; S —应变软化