期刊
OPTICS AND LASER TECHNOLOGY
卷 44, 期 4, 页码 995-1006出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2011.10.018
关键词
Simultaneous laser welding; Finite element modeling (FEM); Response surface methodology (RSM)
In this paper, simultaneous laser transmission welding process is systematically investigated via process modeling, using an FEM and RSM combined approach. The objective of the present research is to study the effects of process parameters on the temperature field and weld bead dimensions. The thermal field is simulated by solving a three dimensional transient heat diffusion equation with temperature dependent material properties using the ANSYS (R) multi-physics. Response surface methodology is then applied for developing mathematical models based on simulation results. The second order equations developed by RSM can predict the values of the responses with significant accuracy. The effect of parameters and their interactions on the responses are studied using the developed response surface models. The mathematical models are further used in search of the optimal process window for obtaining an acceptable weld. The graphical optimization results into a couple of overlay contours plots, which allow quick visual inspection of the area of feasible response values in the factor space to choose the favorable welding parameter combination. (C) 2011 Elsevier Ltd. All rights reserved.
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