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-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.... Key words: GM yield criterion; three-dimensional forging; continuous velocity field; inner product; analytical solution  ......
was studied. Three yield criteria, including von Mises yield criterion, Mohr-Coulomb yield criterion and the unified yield criterion were used to describe the yield phenomena of the metallic glasses. Two classes of the experimental data were chosen to draw the yield loci using the unified yield criterion. It is shown that the unified yield criterion can be used to describe the yield behavior......
Deduction of plastic work rate per unit volume for unified yield criterion and its application ZHAO De-wen(赵德文), LI Jing(李 婧), LIU Xiang-hua(刘相华), WANG Guo-dong(王国栋) State Key... from the unified linear yield criterion and the associated flow rule. The expression is suitable for various linear yield loci in the error triangle between Tresca’s and twin shear stress yield loci......
Equal perimeter yield criterion and its specific plastic work rate:Development, validation and applicationZHANG Shun-hu(章顺虎)1, ZHAO De-wen(赵德文)2, CHEN Xiao-dong(陈晓东)3(1. Shagang School of Iron..., Soochow University, Suzhou 215123, China)Abstract:In order to overcome the nonlinearity of Mises criterion, a new linear yield criterion with a dodecagon shape of the same perimeter as Mises criterion......
:constitutive model; coarse granular material; failure criterion; dilatancy; yield surface...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......
well with that by Spencer method, and it is more accurate than that from classic D-P criteria. Key words: yield criterion; non-associated flow rule; dilatancy angle; plastic potential function 1 Introduction A yield condition or yield criterion describes a material failure in structural plasticity. It defines the threshold state of a material between elastic and plastic or brittle failure......
discussion is presented on the application of egg-shaped function in elasto-plastic constitutive analysis for soft clay. Two main tasks of the paper are: 1) to propose a complete yield criterion based on egg-shaped function and supplement its definition in the deviatoric section, and then a yield criterion suitable for 3D stress conditions is obtained; 2) to elaborate its numerical implementation based......
loci based on Yld2000-2d yield criterion and three kinds of hardening modes were calculated and compared with the experimental results. The results show that the theoretical subsequent yield loci based... biaxial tension. They found that Gotoh yield criterion describes the yield behavior of steel sheet with good accuracy whereas the Taylor model fits the 6xxx aluminum alloy sheet very well. GREEN et al[5......
compared with the yield loci calculated from several existing yield criteria. The analytical result shows that the Barlat89 and Hosford yield criterion describe the general trends of the experimental yield loci of aluminum alloy sheets well, whereas the Mises yield criterion overestimates the yield stress in all the contours. Key words: aluminum alloy sheet; biaxial tensile test; stress-strain curve......
of compressive yield strength of nano-grained ceramics [J]. Int J Plast, 2004, 20: 2007-2026. [11] DONOVAN P E. A yield criterion for Pd40Ni40P20 metallic glass [J]. Acta Metall Mater, 1989, 37: 445-456. [12...J. Cent. South Univ. Technol. (2008) 15(s1): 447-452 DOI: 10.1007/s11771-008-397-9 Mechanical model for yield strength of nanocrystalline materials under high strain rate loading ZHU Rong-tao(朱......