基于ABAQUS软件的微米级金属材料性能研究  

Property Study of Micron-scale Metallic Material with ABAQUS

作　　者：曹金红[1] 

机构地区：[1]辽东学院机电学院,辽宁丹东118003

出　　处：《辽东学院学报（自然科学版）》2009年第3期205-210,共6页Journal of Eastern Liaoning University:Natural Science Edition

摘　　要：为工程实践中迫切需要解决微米和亚微米量级的设计与制造问题,文章中运用MSG塑性理论利用Abaqus软件对铝合金的强度及均匀延伸率进行了比较系统的研究;运用有限单元法分析了MSG应变梯度本构方程和经典的弹塑性本构方程对不同晶粒尺寸的铝合金的应力应变关系;模拟不同晶粒尺寸的铝合金的强度及均匀延伸率。结果表明随着晶粒尺寸的减小,屈服强度、应变硬化明显增加,延伸率却往往越小。对于该问题的研究探索,将是解决材料强度与均匀伸长率这对矛盾体的问题关键,同时,为科研工作者提供了新方法和新途径。The strength and uniform percentage elongation of aluminum alloy were analyzed by using the MSG plasticity theory and ABAQUS. The strain relationship between the MSG strain gradient constitutive equation and the classical elastoplastic constitutive equation and the stress of aluminum alloy with different crystal grain sizes was investigated with finite element method. The intensity and uniform percentage elongation of the alloy with different grain sizes were also simulated. The results showed that the yield strength and strain hardening of the alloy were significantly increased with the decrease of grain size. But the percentage elongation was on the contrary.

关 键 词：尺度效应 应变梯度塑性理论 铝合金 Abaqus有限元 应力-应变 

分 类 号：TF132.2[冶金工程—冶金物理化学]