Dynamic mechanical properties of 2A16-T4 aluminum alloy at wide-ranging strain rates

Xi Xulong; Bai Chunyu; Liu Xiaochuan; Mu Rangke; Wang Jizhen

doi:10.11883/1001-1455(2017)05-0871-08

Volume 37 Issue 5

Jul. 2017

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Xi Xulong, Bai Chunyu, Liu Xiaochuan, Mu Rangke, Wang Jizhen. Dynamic mechanical properties of 2A16-T4 aluminum alloy at wide-ranging strain rates[J]. Explosion And Shock Waves, 2017, 37(5): 871-878. doi: 10.11883/1001-1455(2017)05-0871-08

Citation:

Xi Xulong, Bai Chunyu, Liu Xiaochuan, Mu Rangke, Wang Jizhen. Dynamic mechanical properties of 2A16-T4 aluminum alloy at wide-ranging strain rates[J]. Explosion And Shock Waves, 2017, 37(5): 871-878. doi: 10.11883/1001-1455(2017)05-0871-08

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Dynamic mechanical properties of 2A16-T4 aluminum alloy at wide-ranging strain rates

doi: 10.11883/1001-1455(2017)05-0871-08

Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics, Aircraft Strength Research Institute of China, Xi'an 710065 Shaanxi, China

Received Date: 2016-02-02
Rev Recd Date: 2016-08-13
Publish Date: 2017-09-25

Abstract

Abstract

In order to study the dynamic mechanical properties of 2A16-T4 aluminum alloy, experiments for the alloy at quasi-static, intermediate, and high strain rates were performed using an electronic multi-purpose testing machine, a high velocity hydraulic servo-testing machine and a split Hopkinson press bar (SHPB) at room temperature, and the stress-strain curves at different strain rates were obtained, with a modified Johnson-Cook constitutive model fitted. The dynamic mechanical properties at intermediate strain rates and its influence on the constitutive model's parameters were analyzed. The results show that the strain rate hardening effect on the 2A16-T4 aluminum alloy is not obvious between 10^-4~10² s^-1, but it is obvious between 10²~10³ s^-1, decreasing with the increase of the plastic strain. In addition, this effect is obvious between 10^-4~10³ s^-1, decreasing with the increase of the strain rate. Moreover, the fitted results of modified Johnson-Cook constitutive model agree well with the experiment results, representing well the alloy's dynamic mechanical properties, which can improve the precision of the model's rate-sensitive parameters over a wide range of strain rates.
- Johnson-Cook constitutive model,
- high velocity hydraulic servo-testing machine,
- intermediate strain rates,
- 2A16-T4 aluminum alloy,
- strain rate effect

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References(17)

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