双轴拉伸应力下后继屈服面的演化研究

Abstract

Abstract:

The shape and position of the yield surface of a metallic material have a direct bearing on the determination of its plastic deformation. In this paper, the evolution of the yield surface in a tension-tension stress space is investigated based on the elasto-plastic damage constitutive theory as an endeavor to understand the plastic behavior of metallic materials under biaxial tension. The initial yield surface (IYS) and subsequent yield surfaces are predicted with the consideration of the finite deformation effect and the mixed hardening effect, which shows the vertex effect in the forward part, Bauschinger effect in the rear part, and expansion/contraction, translation and distortion of the subsequent surfaces. For a low work hardening aluminum alloy (Al 6061-T 6511) and a high work hardening aluminum alloy (annealed 1100 Al) under axial, hoop, and combined axial and hoop loading, the theoretical prediction is favorably compared with the experimental results in the literature. The physical mechanism of the evolution of subsequent yield surfaces is elucidated. It provides a feasible method to study the evolution of subsequent yield surfaces.

Key words: component assembling model, evolution of subsequent yield surfaces, mixed hardening effect, vertex effect, Bauschinger effect

CLC Number:

V219
O344.1

CHEN Cen, LIU Fang, FU Qiang, HONG Youshi. Investigation of Subsequent Yield Surface Evolution Under Biaxial Tension[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(12): 2230-2239.

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Investigation of Subsequent Yield Surface Evolution Under Biaxial Tension

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