On Dynamic Mechanical Properties of 3003 Aluminum Alloy Based on Generalized Incremental Stress-State-Dependent Damage Model with Modified Johnson-Cook Equation

The dynamic mechanical properties and the damage prediction are critical for 3003 aluminum alloy during its safety application on lightweight automobile. Dynamic tensile properties at strain rate from 1 to 500 s(-1) were analyzed, and the damage behavior was simulated by using the GISSMO model based on original and modified Johnson-Cook (JC) constitutive equation. The experimental results demonstrated that 3003 alloy exhibited significant strain rate sensitivity in the yield strength and fracture prolongation. JC model was modified based on the GISSMO damage parameter. A damage behavior of 3003 aluminum alloy was predicted accurately by using the modified JC equation. The reliability of the modified JC model was verified by using the cupping experiment and the simulation.

Automated summary

This study analyzed the dynamic mechanical properties and damage prediction of 3003 aluminum alloy for its safe application on lightweight automobiles. It was found that the alloy showed significant strain rate sensitivity in yield strength and fracture prolongation. By modifying the Johnson-Cook constitutive equation using the GISSMO model, the damage behavior of the alloy was accurately predicted. The reliability of the modified model was confirmed through cupping experiments and simulations.