Research on the Large Plastic Deformation Damage and Shock Resistance of 7055 Aluminum Alloy
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We used the split Hopkinson dynamic impact test and ABAQUS finite element simulation to study the damage mechanism of dynamic impacts on the 7055-T4 aluminum alloy. The results show that the energy absorption phenomenon occurs when the dynamic impact temperature is 220°C. There is a clear positive correlation between the size of the precipitated phase and the dynamic impact temperature. The regression effect of the 7055-T4 aluminum alloy is most obvious when the dynamic impact temperature is 320°C. The adiabatic temperature rise model in the dynamic impact shear zone and the damage model considering the adiabatic temperature increase are established. Moreover, the above model has high accuracy and is verified by projectile impact simulation.
This study was supported by the National Natural Science Foundation of the China Youth Fund and the First Project (No. 51705270), National Natural Science Foundation of China (51575289), Shandong Natural Science Foundation Doctoral Fund (No. ZR2016EEP03) and A Project of the Shandong Province Higher Educational Science and Technology Program (No. J17KA0031).
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