Experimental and Numerical Investigation into the Effect of Strain Rate Changes on Failure of AA7075 at the Elevated Temperatures

10th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Zand, H.^1 ; Zhalehfar, F.^2 ; Vafaeesefat, A.^3

Science and Research Branch of the Azad University, Iran^1

Die Design Office, Automotive Industry Research and Innovation Centre of SAIPA, Iran^2

Dept. of Mechanical Eng., School of Engineering, Imam Hussein University, Iran^3

关键词: Analysis of simulations;    Elevated temperature;    Failure locations;    Forming limit curve;    High temperature;    Numerical investigations;    Temperature dependent;    Thermo-mechanical;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/734/3/032109/pdf
DOI  :  10.1088/1742-6596/734/3/032109

来源: IOP

【 摘 要 】

This paper represents the temperature-dependent study which is performed on AA7075. This was performed through the application of deep drawing experiments at high temperature of 250, 300, 350, 400, 450 and 500°C and different forming speeds. FEM study is applied at room and 300 and 400 0C temperature with different strain rates. Softening model is used to model the thermo-mechanical constitutive equation. Forming limit curve models (based on M-K model) were used in the analysis of simulation results in order to predict the onset of necking. Simulation results were compared with experimental data to evaluate the accuracy of onset of necking simulation and failure location prediction.