| 金属成形过程中的塑性失稳 |
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| 引用本文： | 汪凌云.金属成形过程中的塑性失稳[J].力学进展,1993,23(3):398-406. |
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| 作者姓名： | 汪凌云 |
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| 作者单位： | 重庆大学 |
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| 摘 要： | 本文评述了金属成形过程中塑性失稳现象(剪切带、颈缩、皱曲)研究的最新进展和仍存在的问题,着重讨论了塑性失稳预报和本构关系选择的密切关系,指出了塑性失稳预报结果取决于所选择的本构关系。还讨论了材料各向异性、应变率敏感性、不均匀性及其幅度、惯性等因素对塑性失稳的影响。除此之外,对作为分析塑性失稳的基本理论工具——Hill分叉准则亦作了简要讨论。
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| 关 键 词： | 塑性失稳 成形极限 本构关系 |
PLASTIC INSTABILITY IN METAL FORMING PROCESS |
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| Wang Ling-yunChongqing University.PLASTIC INSTABILITY IN METAL FORMING PROCESS[J].Advances in Mechanics,1993,23(3):398-406. |
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| Authors: | Wang Ling-yunChongqing University |
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| Institution: | Wang Ling-yunChongqing University |
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| Abstract: | Recent progress and unsettled problems concerning the plastic instability (shear band, necking, wrinkling) in metal forming processes are reviewed in this paper. The close relation between the prediction of plastic instability and the choice of constitutive laws is emphasized. It is pointed out that the predicted results strongly depend on the assumed constitutive laws. The effects of anisotropy, strain rate sensitivity, imperfection and its amplitude and inertia on plastic instability are discussed. Besides, the Hill's bifurcation criterion-a basic theoretical tool for analysis of plastic instability is also discussed briefly. |
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| Keywords: | plastic instability forming limit constitutive lqw |
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