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New double yield surface model for coarse granular materials incorporating nonlinear unified failure criterionLIU Meng-cheng(刘萌成)1,2, LIU Han-long(刘汉龙)1, GAO Yu-feng(高玉峰)1(1. State Key Laboratory..., China)Abstract:A new double-yield-surface (DYS) model was developed to characterize the strength and deformation behaviors of coarse granular materials (CGMs). Two kinds of deformation mechanisms......
microscope, X-ray diffractometer and transmission electron microscope,respectively. Mechanical property measurements indicate that the yield strength of the surface layer raises significantly while the tensile strength somewhat changes and the elongation percentage reduces severely compared with that of the inside layer. Meanwhile, yield-drop-like phenomenon occurs in the surface layer after SMA......
viscosity and yield stress of the GB/hydroxyl terminated polybutadiene (HTPB) suspensions were determined by Brookfield R/S rheometer. The effect of surface treatment on the viscosity and yield stress of GB... coupling agents, such as γ-glycidoxypropyltrimethoxy silane (GPTES) and γ-methacryloxypropyltrimethoxy silane (MPTMS), respectively. The effect of surface treatment on the viscosity and yield stress of GB......
yield the size dependent behavior of nanowires.Key words:geometric nonlinearity; nanowires; bending; nanowires; bending; surface effect...Surface effects on large deflection of nanowiresYang fan(杨帆)1, 2(1. Department of Mechanics, Xi’an University of Science and Technology, Xi’an 710054, China;2. Department of Engineering Mechanics, Xi......
Application of geometric midline yield criterion to analysis of three-dimensional forging ZHAO De-wen(赵德文), WANG Gen-ji(王根矶), LIU Xiang-hua(刘相华), WANG Guo-dong(王国栋) State Key Laboratory...-dimensional forging. The linear yield criterion expressed by geometric midline of error triangle between Tresca and Twin shear stress yield loci on the p-plane, called GM yield criterion for short......
J. Cent. South Univ. (2012) 19: 2520-2527 DOI: 10.1007/s11771-012-1305-x Element yield rate prediction in ladle furnace based on improved GA-ANFIS XU Zhe(徐喆)1, 2, MAO Zhi-zhong(毛志忠)1, 2 1. School... 110819, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2012 Abstract: The traditional prediction methods of element yield rate can be divided into experience method and data......
of the yield surface in principal stress space. They will be transformed into hexagon when b=0 or b=1, and into dodecagon when 01 or b<0, which indicates that the unified yield criterion theory can... of Powder Metallurgy, Central South University, Changsha 410083, China ? Central South University Press and Springer-Verlag Berlin Heidelberg 2011 Abstract: The yield behavior of metallic glasses......
Surface treatment of 3D outside serrated integral-fin tube manufactured by rolling and extrusion BAI Peng-fei(白鹏飞), LIU Xiao-kang(刘小康), YAN Hui(燕 辉), TANG Biao(唐 彪) School of Mechanical...-extrusion processing were surface-treated through different processes of annealing in hydrogen atmosphere, electrochemical corrosion or sandblasting. The purpose was to eliminate residual stress, clear......
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......
J. Cent. South Univ. (2016) 23: 2165-2172 DOI: 10.1007/s11771-016-3273-z Surface adhesive properties of continuous PBO fiber after air-plasma-grafting-epoxy treatment JIA Cai-xia(贾彩霞)1, WANG Qian(王乾... Abstract: It was found that air dielectric barrier discharge (DBD) plasma contributed to the grafting of epoxy resin onto continuous PBO fiber surface. This air-plasma-grafting-epoxy method yielded......
