| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Strain-rate-sensitivity Calibration of Aluminum Alloy Sheet by Electromagnetic Flanging of Circular Hole |
| Author(s) |
Wei Liu, Yangzhe Lin, Haibo Zhou, Zhenghua Meng, Shangyu Huang |
| On-Site Speaker (Planned) |
Wei Liu |
| Abstract Scope |
The strain rate of aluminum alloy sheet reaches up to thousands per second in electromagnetic forming, and it is difficult to obtain the flow stress curve at such high speed. For the hardening law at high strain rate, the strain-hardening term was initially determined by the quasi-static uniaxial tensile test to simplify the parameter identification. Due to the delayed deformation at the central zone of circular workpiece in the electromagnetic bulge test by planar spiral coil, an inverse method of strain-rate-sensitivity calibration has been proposed by electromagnetic flanging of circular hole. The initial size of circular hole was determined as a half diameter of planar spiral coil, and the discharged energy was defined to induce reasonable deformation. A numerical model was established for electromagnetic flanging of circular hole. The experimental and simulated deformation distributions on the cross-sectional profile of workpiece were compared to calibrate the strain-rate-hardening term of Johnson-Cook model. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |