Titlebook: Mechanics of Sheet Metal Forming; Material Behavior an Donald P. Koistinen,Neng-Ming Wang Book 1978 Plenum Press, New York 1978 computer.de

發(fā)炎

mercenary

生命層

Plastic Deformation Behavior under Conditions of Combined Stressristics for both isotropic and anisotropic materials are discussed, and the rules for anisotropy induced by prestrain and for work-hardening caused by subsequent strain are determined. An equation which represents the yield surfaces for large subsequent strain of prestrained materials is proposed.

饒舌的人

Favorable

Sheet Necking-III. Strain-Rate Effectso substantially increase the predicted limit strains beyond their corresponding values for time-independent material response. We also discuss the influence of strain-rate dependence on imperfection- sensitivity and forming limit curves.

Moderate

oracle

WAG

調(diào)色板

Plastic Deformation Behavior under Conditions of Combined Stressepresent the results systematically, a yield surface in the σ., σ.,σ., 3τ., stress space for large plastic strain is used. The work-hardening characteristics for both isotropic and anisotropic materials are discussed, and the rules for anisotropy induced by prestrain and for work-hardening caused by

遺棄

Sheet Necking—I. Validity of Plane Stress Assumptions of the Long-Wavelength Approximation an exact solution for the growth-rate of a small amplitude, sinusoidal thickness variation in a sheet of material characterized by . = ασ. in simple tension. The plane stress assumptions become accurate when the ratio of variation wavelength to average thickness exceeds four and otherwise lead to o