Experimental Study of Wide Strain Rates and Constitutive Model Based on Damage of 5083 Aluminum Alloy

GAO Ning; ZHU Zhi-Wu

doi:10.11858/gywlxb.2017.01.008

Volume 31 Issue 1

Dec 2016

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Chinese Journal of High Pressure Physics > 2017 > 31(1): 51-60.

GAO Ning, ZHU Zhi-Wu. Experimental Study of Wide Strain Rates and Constitutive Model Based on Damage of 5083 Aluminum Alloy[J]. Chinese Journal of High Pressure Physics, 2017, 31(1): 51-60. doi: 10.11858/gywlxb.2017.01.008

Citation:

GAO Ning, ZHU Zhi-Wu. Experimental Study of Wide Strain Rates and Constitutive Model Based on Damage of 5083 Aluminum Alloy[J]. Chinese Journal of High Pressure Physics, 2017, 31(1): 51-60. doi: 10.11858/gywlxb.2017.01.008

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Experimental Study of Wide Strain Rates and Constitutive Model Based on Damage of 5083 Aluminum Alloy

doi: 10.11858/gywlxb.2017.01.008

GAO Ning,
ZHU Zhi-Wu^{*
,
,}

School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 13 Dec 2015
Rev Recd Date: 27 Feb 2016

Abstract

Abstract

The 5083 aluminum alloy is widely used in engineering, and is inevitably subjected to a variety of different loadings, including strong dynamic loading such as impact and collision.Therefore it is necessary to study its mechanical properties under loading of a wide range of strain rates as well as its constitutive model.With this in view, firstly, an experimental study of the 5083 aluminum alloy was carried out at quasi-static, middle and high strain rates of tension and compression loading and the stress-strain curves of the wide strain rate were obtained.The experimental results show that in the strengthening stage, the tensile stress-strain curves are always lower than the compression stress-strain curves when the experimental condition is kept constant, so the phenomenon is explained by microscopic mechanism.Then, by introducing damage into our study, the effects of damage on the material's mechanical properties were considered under impact tensile loading.Based on the continuum mechanics and experimental results, the damage evolution equation was obtained.Finally, by improving the Johnson-Cook (JC) constitutive model and the existing damage evolution equation, the dynamic constitutive model considering the damage of the 5083 aluminum alloy was established.By comparing the experimental curves with the model curves, it was found that their fitting is good, showing that the proposed model has good applicability.Our research can serve as an effective scientific basis, an analytical model and necessary reference for the engineering application of the 5083 aluminum alloy.
- 5083 aluminum alloy,
- impact,
- damage,
- Johnson-Cook model,
- constitutive relation

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References(25)

References

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Experimental Study of Wide Strain Rates and Constitutive Model Based on Damage of 5083 Aluminum Alloy

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