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的动态计算式及考虑材料拉压差异的拉压强度比K计算式.研究结果表明:Mohr-Coulomb准则对岩土材料的适用性较差,只能在一定三轴压缩条件下对压缩试验点进行预测,对拉伸强度试验点的预测性差；K越小,模型参数m对Van Eekelen形状函数的影响越大,当m=-0.23时,该形状函数的外凸性最优；修正后的Mohr-Coulomb准则对岩土材料的适用性较好,极限迹线变化规律与试验规律相符,对K预测精确；基于试验结果对c和的动态计算是可行的,考虑参数的变化能使修正后Mohr-Coulomb准则对岩土材料强度预测更精确,也说明非线性准则优于线性准则；修正的K计算式为静水应力p的单值函数,通过与修正的Lade-Duncan准则,峰值比法计算的K比较,考虑拉压差异的非线性计算方法更优. 关键词:Mohr-Coulomb准则；真三轴试验；材料参数；形状函数；拉压强度比K 中图分类号:TU45......
; the trajectory of σ3 takes the form of arc [7]. Figure 7 Schematic diagram of stress rotation Figure 8 Mohr’s circle of stress at point A in Figure 7 The horizontal stress σh and vertical stress σv......
and mineral resources in Eritrea and exploration progress[J]. Mineral Exploration, 2012, 3(5): 707-715. [17] MOHR P A. The Geology of Ethiopia: Haile Selassie[M]. Addis Ababa: Addis Ababa University......
] GROLLEAU V, GARY G, MOHR D. Biaxial testing of sheet materials at high strain rates using viscoelastic bars [J]. Experimental Mechanics, 2008, 48: 293-306. [13] GAO Tie-jun, LIU Ying, CHEN Peng, WANG......
copper sulfide ore under the stress of high concentration of Cu2+. References [1] NORTHEY S, MOHR S, MUDD G M, WENG Z, GIURCO D. Modelling future copper ore grade decline based on a detailed assessment......
of the underground cavities are determined. The following conclusions are reached: (1) the proposed approach is more accurate to predict surrounding rock pressure than the Mohr-Coulomb failure... modes of underground cavities, a common choice is the upper bound limit analysis. The pioneering work was conducted by LECA and DORMIEUX [33] in which the tunnel face stability was studied with a Mohr......
, WANG Shan-yong, LUO Song. Dynamic Mohr–Coulomb and Hoek–Brown strength criteria of sandstone at high strain rate [J]. International Journal of Rock Mechanics and Mining Sciences, 2019, 115: 48-59......
criterion formula based on Mohr coulomb criterion 将表2及3中各参数分别代入式(12)及式(13)得到相应表达式,然后基于表达式绘制相应曲线,代入试验数据验证建立的承压注浆加固含弱面岩体效果评价准则的合理性,结果如图20所示. 图20 承压注浆加固含弱面岩体效果评价准则验证示意图 Fig. 20 Verification diagram......
mixture[J]. Acta Materialia, 2012, 60(3): 1418-1432. [36] 乔 良, 涂 建, 赵利军, 龚 苹, 马爱娥, 张先锋, 张 将, 乔光利. Al/W/PTFE粒径级配关系对材料强度影响的实验研究[J]. 兵器材料科学与工程, 2014, 37(6): 17-21. QIAO Liang, TU Jian, ZHAO Li-jun, GONG......
