|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Investigation on the High Strain Rate Formability of Al-Cu-Mg Alloy by Solid-liquid Coupling Simulation
||Shi-Hong Zhang, Da-Yong Chen
|On-Site Speaker (Planned)
The formability of the sheet is getting more attention these several years for the impact hydroforming (IHF). Investigation on the formability is complicated for the IHF because of the limited forming time and testing space. The finite element modeling is no doubt a high-efficient and low-cost method to evaluate the high strain rate formability. The Al-Cu-Mg sheet specimen was tested by tensile test under different strain rates. The stress-strain curve characterizes with S-shape when the strain rates are on the level of 103/s. A modified Kocks-Mecking model was established and sub-developed in LS-DYNA software to precisely describe the stress-strain response. The fluid structure interaction algorithm was employed to realize the solid-liquid coupling. The formability improvement owns to fluctuating feeding when the strain rates are 1000/s~2000/s. It is on account of fluctuating loading helps the material feeding, meanwhile the resistance of necking is improved when the strain rates change from 3000/s~5000/s.
||Definite: At-meeting proceedings