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侯 帅,朱有利,王燕礼,孙寒骁.基于多晶体塑性与唯象学本构模型的纯铝与单晶铝的有限变形分析与对比[J].稀有金属材料与工程(英文),2017,46(12):3760~3766.[Hou Shuai,Zhu Youli,Wang Yanli,Sun Hanxiao.Analysis and comparison of finite deformation of pure anluminium and single crystal aluminium based on polycrystal plasticity and phenomenological constitutive models[J].Rare Metal Materials and Engineering,2017,46(12):3760~3766.]
Analysis and comparison of finite deformation of pure anluminium and single crystal aluminium based on polycrystal plasticity and phenomenological constitutive models
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Received:September 30, 2016  Revised:January 05, 2017
DOI:
Key words: polycrystal plasticity  constitutive relation  pure aluminium  single crystal aluminium  finite element method  uniaxial tension
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Author NameAffiliationE-mail
Hou Shuai 装甲兵工程学院 装备维修与再制造工程系 houshuai2012@sina.com 
Zhu Youli 装甲兵工程学院 装备维修与再制造工程系 zhuyl2011@sina.com 
Wang Yanli 装甲兵工程学院 装备维修与再制造工程系  
Sun Hanxiao 装甲兵工程学院 装备维修与再制造工程系  
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Abstract:
      Polycrystal plasticity model can reflect the material’s microstructure and various mechanical response, but it is too complecate for great computation. The phenomenological elasto-plastic constitutive model is relatively simple, as yet based on the additive decomposition of deformation rate tensor of phenomenological elasto-plastic constitutive model under the condition of large deformation will bring error. In this paper, the uniaxial tensile test process of pure aluminium and single crystal aluminium have carried on the calculation based on the polycrystal plasticity finite deformation elasto-plastic finite element method(CPFEM) and phenomenological elasto-plastic constitutive model, and compared the results of two models. It is researched that effect of calculation error about the deformation amount to the phenomenological elasto-plastic constitutive model. The results show that the stress-strain curve of pure aluminium calculated by phenomenological elasto-plastic constitutive model began to cause error when true strain exceeds 25.5%, and increases with increasing of strain. Polycrystal plasticity model reflect the anisotropy of deformation, texture and residual stress during large drformation of pure aluminium and single crystal aluminium.