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of carbon microspheres using a silane coupling agent[J]. Journal of Functional Materials, 2011, 42(1): 25-29. [6] 许并社, 罗秋苹, 杨永珍, 等. 银/碳微球复合材料的制备和表征[J]. 中国材料进展, 2009, 28(2): 35-38. XU Bingshe, LUO......
an important role in resisting deformation and failure under loading. In classical strength theory, such as the Mohr-Coulomb criterion, the strength components of material are assumed to be mobilized... of VERMEER and BORST [6]. But these models are based on the Mohr-Coulomb criterion and ignore the effect of the intermediate principal stress. However, many studies demonstrated that the intermediate principal......
Germany, part of Springer Nature 2018 Abstract: Based on the nonlinear Mohr-Coulomb failure criterion and an associated flow rule, a kinematic admissible velocity field of failure mechanism..., it is assumed that the soil material overlying anchor plate obeys the linear Mohr- Coulomb failure criterion (i.e., the M-C criterion). However, a large number of studies have shown that almost all failure......
pressures: 4.3 Failure envelopes The failure critical conditions can be plotted in the form of Mohr diagrams that can represent the state of stress within the sample at the point of failure. The failure envelopes are determined from the stress conditions (σ1, σ3) at the time of failure. The Mohr circles and associated failure envelopes for white gypsum and offwhite anhydrite samples of Artashi......
the axis direction of the bolt. For bolted specimens with the same materials, the friction angle and cohesion are equal. Based on Mohr Coulomb theory, the greater the lateral pressure is, the higher.... A cuboid with dimensions of 70 mm× 70 mm×140 mm was selected as the calculation model of the rock specimens, and the diameter of the bolt was 6 mm. The Mohr Coulomb model and the C3D8R element were......
相对最安全状态的参量的比,IYAI∈[0, 1],IYAI=0时应力点在屈服面上,发生屈服；IYAI=1时应力点在等倾线上,处于相对最安全状态[14].基于Mohr-Coulomb准则的屈服接近度为: (13) 式中:I1为应力张量的第一不变量；J2为偏应力张量的第二不变量；为应力洛德角；c为凝聚力；为摩擦角.c和采用三轴压缩试验的结果. 图12所示为2种加载..., 2011, 43(5): 64-70. [7] 陈卫忠, 刘豆豆, 杨建平, 等. 大理岩卸围压幂函数型Mohr强度特性研究[J]. 岩石力学与工程学报, 2008, 27(11): 2214-2220.CHEN Wei-zhong, LIU Dou-dou, YANG Jian-ping, et al. Power function based Mohr strength criterion......
Drucker-Prager linear model were obtained. In addition, through the friction strength tests, parameters of the Mohr-Coulomb model were gained, which proved in basic agreement with those of the extended... as well. Test results prove consistent with the Mohr-Coulomb yield criteria, that is, ......
the formability and the fracture mechanism of textured zinc sheets[J]. Journal of Materials Processing Technology, 2013, 213(6): 851-855. [8] EBNOETHER F, MOHR D. Predicting ductile fracture of low carbon steel sheets: Stress-based versus mixed stress/strain-based Mohr–Coulomb model[J]. International Journal of Solids and Structures, 2013, 50(7): 1055-1066. [9] 陈光南, 胡世光. 成形极限曲线的新概念[J]. 机械工程学报, 1994, 30......
文章编号:1004-0609(2015)-05-1200-09 Mohr-Coulomb屈服准则与Drucker-Prager屈服准则在块体非晶合金中的应用 邹 萍,钟 鸣,龙志林,陈舒敏,廖光开,杜雪林 (湘潭大学 土木工程与力学学院,湘潭 411105) 摘 要:推导Mohr-Coulomb(M-C)和Drucker-Prager(D-P)屈服准则在不同应力状态下的表达式以及它们之间的相互关系；基于文献数据,比较两个准则描述块体非晶合金屈服行为的适应性,详细地阐述了正应力与静水压力对块体非晶合金屈服行为的影响.结果表明:静水压力对材料屈服的影响相当于一个叠加的正应力,无论是压缩还是拉伸,均对剪切屈服或断裂起抑制作用.D–P屈服准则函数描述块体非晶合晶的屈服断裂比M–C准则更好. 关键词:块体非晶合金；Mohr-Coulomb屈服准则；Drucker......
: 式中:V为计算模型单元的总体积. 4) 孔隙和非孔隙单元的赋值.力学分析时将孔隙结构单元设置为model null,将非孔隙单元设置为model mohr；渗流分析时将孔隙结构单元设置为...试件的体积应力.数值计算参数如下:岩石弹性模量E=10 GPa；泊松比；内摩擦角40°；内聚力c=2.5 MPa.调用FLAC3D中的Mohr–Coulomb模型,通过设置大变形模型,跟踪各孔隙单元的体积变化,并其换算成孔隙率的变化,通过对不同围压下的数值模拟,发现峰前多孔岩石介质孔隙率主要受体积应力影响.本数值模型中体积应力用下式表示: ......
