Product Code: ICAL05_1302

Modeling of Laser Keyhole Welding with Adaptive Mesh Refinement
Authors:
Peng Li, GE Global Research Center (Shanghai); Shanghai Peoples Republic of China
Hyungson Ki, Michigan State University; Lansing MI USA
Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2005

Adaptive mesh refinement (AMR) technique has been applied in the 3D numerical model for laser keyhole-welding simulation. SIMPLEC algorithm is realized with AMR in the program and level set method is adopted to capture the movement of the liquid/vapor interface. Knudsen layer, existed at the liquid/vapor interface, has been dealt as boundaries in the program using jump conditions. By the implementation of AMR, more than 80% computation costs can be saved compared with the old model using a fixed non-uniform mesh. The model has the capability of ab initio simulation of the keyhole phenomena. The keyhole evolution under various processing conditions can then be studied from the extracted parameters, like temperature, velocity, and pressure, from the simulation.