A study on the material properties of post-fire 6060-T6 aluminum alloy and calibration of the constitutive model

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (16) : 56-65.

LIN Li1,2，ZHANG Yaoyue1，XIAO Xinke3

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Abstract

In order to evaluate the dynamic mechanical properties of post-fire aluminum alloy structure, a reasonable constitutive model of post-fire aluminum alloy material should be used, a series of post-fire mechanical properties tests of 6060-T6 aluminum alloy were carried out using a universal testing machine and Hopkinson pressure bar (SHPB) . Firstly, it is found that the elastic modulus, yield strength and tensile strength of 6060-T6 aluminum alloy are the smallest when the fire temperature is 450℃, the 6060-T6 aluminum alloy cooled by 450℃ fire is selected as the research object. When the temperature rises, the post-fire aluminum alloy shows the phenomenon of temperature softening, Calibrated the Modified Johnson-cook (MJC) constitutive model, which can reasonably describe the plastic deformation behavior of post-fire aluminum alloy. Finally, the ballistic limit and failure mode of post-fire 6060-T6 aluminum alloy are obtained by the impact test of the first stage light gas gun target, the impact model of the target was established by Abaqus, and the validity of the parameters of the MJC constitutive model was verified by the comparison of the experimental and numerical results.

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Modified Johnson-cook(MJC) constitutive model / Fired cooling / Ballistic limit / numerical simulation

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LIN Li1,2，ZHANG Yaoyue1，XIAO Xinke3. A study on the material properties of post-fire 6060-T6 aluminum alloy and calibration of the constitutive model[J]. Journal of Vibration and Shock, 2023, 42(16): 56-65

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