Numerical modeling and experimental validation of curvilinear laser bending of magnesium alloy sheets

Laser bending is an innovative technique to obtain the required bend-angle and sheet metal curvature by means of laser beam irradiation with controlled laser parameters. In this work, a numerical investigation on curvilinear laser bending of magnesium M1A aoy sheets has been carried out. Three-dimensional sequential transient thermomechanical numerical model is developed by using finite element method. The model has been validated by comparing the predicted results with those obtained in the experiments. The curvilinear laser bending process is studied in terms of temperature distribution, stress–strain distribution, bend angle and displacement at the edges. The results showed that the bend angle increases with increase in scanning path curvature. It is observed that the displacement at various edges and final shape of the worksheet are affected by the scanning path curvature. The results will be useful in adjustment and alignment processes and the generation of complex shapes using lasers.

[1]  Z. Ji,et al.  FEM simulation of the temperature field during the laser forming of sheet metal , 1998 .

[2]  Zhenqiang Yao,et al.  Temperature gradient mechanism in laser forming of thin plates , 2007 .

[3]  Wesley J. Cantwell,et al.  Laser Forming of Fibre Metal Laminates , 2005 .

[4]  T. Hennige.  Development of irradiation strategies for 3D-laser forming , 2000 .

[5]  D. Guo,et al.  Laser bending of brittle materials , 2010 .

[6]  J. Ramos-Grez,et al.  Bending of stainless steel thin sheets by a raster scanned low power CO2 laser , 2009 .

[7]  D. Misra,et al.  Finite element simulation of 3-D laser forming by discrete section circle line heating , 2010 .

[8]  Keith C. C. Chan,et al.  Thermal expansion and deformation behaviour of aluminium-matrix composites in laser forming , 2001 .

[9]  G. N. Labeas,et al.  Development of a local three-dimensional numerical simulation model for the laser forming process of aluminium components , 2008 .

[10]  Wenchuan Li,et al.  Numerical and Experimental Study of Strain Rate Effects in Laser Forming , 2000 .

[11]  M. Avedesian,et al.  Magnesium and magnesium alloys , 1998 .

[12]  Suck-Joo Na,et al.  Feedback control for 2D free curve laser forming , 2005 .

[13]  T. Kermanidis,et al.  Numerical and experimental investigation of the laser forming process , 1999 .

[14]  Chao Liu,et al.  Optimal process planning for laser forming of doubly curved shapes , 2002 .

[15]  Zhenqiang Yao,et al.  Analysis and control of edge effects in laser bending , 2010 .

[16]  Taylan Altan,et al.  Finite element simulation of magnesium alloy sheet forming at elevated temperatures , 2004 .

[17]  Y. Yao,et al.  Numerical and Experimental Investigation of Convex Laser Forming Process , 2001 .

[18]  B. Mordike,et al.  Magnesium: Properties — applications — potential , 2001 .

[19]  Miaoquan Li,et al.  Deformation behaviours of laser curve bending of sheet metals , 2004 .

[20]  Suck-Joo Na,et al.  Development of irradiation strategies for free curve laser forming , 2003 .

[21]  B. Guo,et al.  FE simulation of laser curve bending of sheet metals , 2007 .

[22]  Y. Yao,et al.  Analysis and Prediction of Edge Effects in Laser Bending , 2001 .