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首页> 外文期刊>International Journal of Plasticity >Evolution of subsequent yield surfaces and elastic constants with finite plastic deformation. Part II: A very high work hardening aluminum alloy (annealed 1100 Al)
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Evolution of subsequent yield surfaces and elastic constants with finite plastic deformation. Part II: A very high work hardening aluminum alloy (annealed 1100 Al)

机译：随后的屈服面和具有有限塑性变形的弹性常数的演变。第二部分：非常高的工作硬化铝合金（退火1100 Al）

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Results are presented on the evolution of subsequent yield surfaces with finite deformation in a very high work hardening annealed 1100 aluminum alloy. In Part I [Khan, A.S., Kazmi, R., Stoughton, T., Pandey, A., 2009a. Evolution of subsequent yield surfaces and elastic constants with finite plastic deformation. Part 1: a very low work hardening aluminum alloy (Al-6061-T6511) 25, 1611-1625.] of this paper, similar results are presented for a very low work hardening aluminum alloy. Those results were very different from the present ones, and all the results were for proportional loading paths. The subsequent yield surfaces are determined in tension, free end torsion and combined tension-torsion proportional and non-proportional loading paths, using 10 μ deviation from linearity definition of yield. Yield surfaces are also determined after linear, bi-linear, and non-linear unloading paths after finite deformation under tension, free end torsion, and combined tension-torsion loading. The initial yield surface is closer to the von-Mises surface and the subsequent yield surfaces show distortion, expansion, positive cross-effect, and "nose" in the loading direction. Additionally, the subsequent yield surfaces after non-proportional loading paths show shrinkage and compounded distortion. The yield surfaces after unloading depict strong anisotropy, positive cross-effect and exhibits different proportion of distortion in each loading conditions. The Young's and shear modulus decrease with plastic deformation and this decrease is much less than those reported in the published literature.
机译：结果表明，在非常高的加工硬化退火1100铝合金中，后续屈服面的变形有限。在第一部分中[汗，A.S。，卡兹米，R。，斯托顿，T。潘迪，A，2​​009a。随后的屈服面和具有有限塑性变形的弹性常数的演变。本文的第1部分：非常低工作硬化铝合金（Al-6061-T6511）25，1611-1625。]，对于非常低工作硬化铝合金也给出了类似的结果。这些结果与当前的结果有很大的不同，所有的结果都是针对比例加载路径的。随后的屈服面可通过屈服线性定义偏离10μ来确定张力，自由端扭转以及组合的拉伸-扭转比例和非比例载荷路径。在线性，双线性和非线性卸载路径下，在拉伸，自由端扭转和组合的拉伸-扭转载荷下进行有限变形后，还可以确定屈服面。最初的屈服面更靠近von-Mises表面，随后的屈服面在加载方向上显示出扭曲，膨胀，正交叉效应和“鼻子”。另外，在非比例加载路径之后的后续屈服面显示出收缩和复合变形。卸载后的屈服面表现出很强的各向异性，正的交叉效应，并且在每种加载条件下表现出不同比例的变形。杨氏模量和剪切模量随着塑性变形而减小，并且该减小量远小于已公开文献中报道的那些。

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