Finite element simulation of laser dynamic forming

• Main Author: Lee, Jing Wen.
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Final Year Project
• Language: English
• Published: 2011
• Subjects: DRNTU::Engineering::Mathematics and analysis::Simulations
• Online Access: http://hdl.handle.net/10356/46093
• Institution: Nanyang Technological University

Laser Dynamic Forming (LDF) is a newly developed fabrication technique that involved a non-contact process with the target material utilizing laser source. It was developed from the Laser Shock Processing that is used to replace the conventional material treatment method. It has a lot of advantages as compare to the other forming method. Fabbro model is used to model the loading of the shockwave on the target material where the laser pulse is assumed to be uniform across the surface. By using the further derived uniform shockwave pressure from Fabbro model with the Johnson-Cook Plasticity Model, the plastic deformation of copper is simulated. Then, the finite element modeling of the desired simulation condition is created. With comparison to the previous studies that was carried out, the results of various simulations is discussed in order to investigate the effects of various critical parameters on the plastic deformation process. The critical parameters include the effect of laser intensity and the aspect of mold ratio. Future possible efforts to fully understand Laser Dynamic Forming process was then discussed.