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多晶Cu屈服及后继屈服拉扭实验的晶体塑性数值分析胡桂娟1,2,张克实1,石艳柯2,苏莉3(1.广西壮族自治区南宁市广西大学工程防灾与结构安全重点实验室2.广西壮族自治区南宁市 广西建设职业技术学院3.航天科工集团二院二一零所)摘 要:针对预拉伸和预扭转变形后的拉扭组合实验,用多晶集合体模型为代表性单元,结合晶体塑性理论对多晶Cu进行了晶粒尺度的屈服特性研究,采用子模型法对晶粒尺度的代表性单元模型和多晶Cu试样拉扭实验进行跨尺度材料力学行为分析.结合对多晶集合体的后继屈服面形状及演化趋势的研究,探讨不同加载路径和......
Trans. Nonferrous Met. Soc. China 29(2019) 775-784 Prediction of grain scale plasticity of NiTi shape memory alloy based on crystal plasticity finite element method Li HU1, Shu-yong JIANG 2, Lai-xin... was investigated through two-dimensional crystal plasticity finite element simulation and corresponding analysis based on the obtained orientation data. Stress and strain distributions of the deformed NiTi......
J. Cent. South Univ. (2012) 19: 1098-1108 DOI: 10.1007/s11771-012-1115-1 A plasticity model for sand-structure interfaces A. Lashkari Department of Civil & Environmental Engineering, Shiraz... role is transferring loads from structures to soil masses. An interface model within the bounding surface plasticity framework and the critical state soil mechanics is presented. To this aim, general......
Effects of strain state and slip mode on the texture evolution of a near-α TA15 titanium alloy during hot deformation based on crystal plasticity methodJie Zhao1,2,Liangxing Lv3,Kehuan Wang1,2,Gang... forming. In this paper, the texture evolution of a near-α TA15 titanium alloy during the hot metal forming under different strain states were discussed based on the crystal plasticity finite element......
Multi-scale crystal plasticity ?nite element simulations of the microstructural evolution and formation mechanism of adiabatic shear bands in dual-phase Ti20C alloy under complex dynamic loadingYu...-scale crystal plasticity finite element method with experimental measurements. The complex local micro region load was progressively extracted from the simulation results of a macro model and applied......
of polycrystalline material at high temperature were carried out. The crystal plasticity model proposed by Asaro and Needleman was applied to a polycrystal model in the finite element simulation... deformation develops over the polycrystal and that the strain concentration appears around the triple point of crystal grain boundary. Key words:crystal plasticity; finite element method; grain boundary......
质量,可尽量排除单元性质对计算结果的影响. 图2 轧制极薄带晶体塑性有限元模型 Fig. 2 Crystal plasticity finite element model of foil rolling 晶体塑性有限元模拟箔轧工艺参数:上下工作轧辊直径为30 mm,上工作辊转速为1.04 rad/s,上下工作辊异速比为1.1,轧辊与轧件之间接触采用库仑摩擦定律,摩擦因数..., PARTHASARATHY T A. A crystal-plasticity FEM study on effects of simplified grain representation and mesh types on mesoscopic plasticity heterogeneities[J]. Materials Science and Engineering A, 2012, 553......
are summarized.Then,corresponding macroscopic phenomenological constitutive models and crystal plasticity-based models are reviewed.Finally, some conclusions and recommended topics on the cyclic...Review on cyclic plasticity of magnesium alloys: Experiments and constitutive modelsGuo-zheng Kang1,2,Hang Li11. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School......
deformation mechanisms are considered in the context of crystal plasticity. The model can well predict the dependence of stress-strain relations on loading angle with respect to the microstructure. The influence of the twinning and lamellar spacing on the deformation behavior and biaxial yield surfaces for PST crystals are also examined. Key words:TiAl alloy; crystal plasticity; micromechanical......
%TiB2p/6061Al composites are 120 GPa, 472.6 MPa and 9.79%, respectively, which show high strength and plasticity. A lot of dimples and a few cracked particles are observed on the fracture surfaces of the composites, which indicates good plasticity of the composites. The high strength and plasticity of TiB2p/6061Al composites are attributed to good bonding between TiB2 particles and aluminum alloy. Key......