Acta Photonica Sinica, Volume. 43, Issue 6, 614001(2014)
Numerical Simulation of Transient Response Process of L2 Aluminum Sheet by Laser Loading Highspeed Forming
The highspeed forming process of L2 aluminum sheet by laser loading was numerically simulated with the finite element software ABAQUS. In the simulation, the transient response process of the forming by single laser loading was investigated, and the change rules of the characteristics, such as displacement, velocity, strain and strain rate, were discussed. The results indicated that an obvious plastic deformation occurred in the central part of the target after the laser loading, and the cross sections thereof were conical. During the process of highspeed forming, the metal sheet underwent a rapid elastic deformation with large oscillation amplitude, and then attenuated into a static state. In the laser forming, the deformation duration was usually at a level of a few microseconds. The displacements at the different nodes varied in a similar trend, among which those in the central region endured larger variations than those in the boundary region. The maximum speed in the central region of the aluminum sheet reach 3 700 m/s during the laser forming. The strain rate increased considerably in the period of 2 μs during the forming, whose maximum value is at a level of 104~105 s-1.
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YAO Hongbing, YU Wenlong, GAO Yuan, LI Yaru, MENG Chunmei, JIANG Guangping, ZHANG Yongkang. Numerical Simulation of Transient Response Process of L2 Aluminum Sheet by Laser Loading Highspeed Forming[J]. Acta Photonica Sinica, 2014, 43(6): 614001
Received: Sep. 2, 2013
Accepted: --
Published Online: Aug. 18, 2014
The Author Email: Hongbing YAO (yaoye@ujs.edu.cn)