铝合金应变率效应综述及其机理研究

Study on the Strain Rate Effects and Mechanisms for Aluminum Alloys

铝合金材料的动态力学性能已有了大量的研究,许多文献表明铝合金有着复杂的应变率效应,而且不同种类铝合金的应变率效应研究也不够充分具体。本文对铝合金应变率效应已有的研究进行归纳和总结,并在微观层面对铝合金的应变率效应进行了理论机理解释。此外,对于在铝合金材料中常用的Johnson-Cook本构模型的改进进行了研究总结。

There are a lot of achievements on the dynamic properties of aluminum alloys. Many literatures show that aluminum alloys have complex strain rate effects, and the current understanding of the strain rate effects of different aluminum alloys is still not enough. The strain rate effects of aluminum alloys were reviewed and summarized in this paper. The mechanical and theoretical mechanisms related to strain rate effects of aluminum alloys were explained at the microscopic level. In addition, the development and improvement of the Johnson-Cook constitutive models applied to aluminum alloys, were briefly summarized.