Thermo-mechanical and experimental analysis of double pass line heating

Abstract

The present investigation deals with process analysis of oxy-acetylene flame assisted double pass line heating for varying plate thickness. oxy-acetylene flame as the heat source for multi pass line heating to achieve 3-D bending of plates with varying thicknesses was studied. The oxy-acetylene flame was modeled as the moving heat source in the FEM analysis. The transient thermal histories were predicted taking into account the temperature dependent thermo-mechanical properties. A comparative study between single pass and double pass line heating residual deformation was also carried out. The temperature distribution and residual deformations predicted by the numerical model developed in the present work compared fairly well with those of the experimental ones.

Keywords

double pass / thermal history / residual deformations / 3-D FEM / transient analysis / elasto-plastic analysis / oxy-acetylene gas torch

References

[1] Ansys Inc (2002). Theory reference. Southpointe, PA.

[2] Awang M. The effects of process parameters on steel welding response in curved plates, 2002, West Virginia, USA: College of Engineering and Mineral Resources at West Virginia University

[3] Bae K.Y., Yang Y.S., Hyun C.M., Cho S.H. Simplified mathematical formulas for the prediction of deformations in the plate bending process using an oxy-propane gas flame. Proceedings of the Institution of Mechanical Engineers Part B, Journal of Engineering Manufacture, 2009, 223(2): 155-161

[4] Biswas P., Mandal N.R., Sha O.P. Three dimensional finite element prediction of transient thermal history and residual deformation due to line heating. Journal of Engineering for the Maritime Environment, Part M, 2007, 221: 17-30

[5] Brown S., Song H. Implication of three-dimensional numerical simulations of welding large structures. Weld. J., 1992, 71(2): 55-62

[6] Clausen HB (2000). Plate forming by line heating. PhD thesis, Department of Naval Architecture and Offshore Engineering Technical University of Denmark.

[7] Ishiyama M., Tango Y., Shirai M. An automatic system for line heating bending processing method utilizing FEM application. 10th International Conference on Computer Applications in Shipbuilding (ICCAS), 2, 1999, Cambridge, Massachusetts: M.I.T., 419-436

[8] Jang C.D., Seo S.I., Ko D.E. A study on predictions of deformations of plates due to line heating using a simplified thermal elasto-plastic analysis. Journal of Ship Production, 1997, 13(1): 22-27

[9] Jang C.D., Kim T.H., Ko D.E., Lamb T., Ha Y.S. Prediction of steel plate deformation due to triangle heating using the inherent strain method. Journal of Marine Science and Technology, 2005, 10: 211-216

[10] Mahapatra M.M., Datta G.L., Pradhan B., Mandal N.R. Modelling the effects of constraints and single axis welding process parameters on angular distortions in one-sided fillet welds. Proc. Instn. Mech Engrs, Part B: J. Engineering Manufacture, 2007, 221: 397-407

[11] Michaleris P., Debiccari A. Prediction of welding distortion. Weld. J., 1997, 76(4): 172-180

[12] Nomoto T., Ohmori T., Sutoh T., Enosawa M., Aoyama K., Saitoh M. Development of simulator for plate by line heating. Journal of the Society of Naval Architects of Japan, 1990, 168: 527-535

[13] Shin J.G., Kim W.D., Lee J.H. Numerical modeling for systematization of line heating process. Journal of Hydrospace Technology, 1996, 2(1): 41-54

[14] Shin J.G., Woo H.J. Analysis of heat transfer between the gas torch and the plate for the application of line heating. Journal of Manufacturing Science and Engineering, Transactions of the ASME, 2003, 125: 794-800

[15] Ueda Y., Murakawa H., Rashwan A.M., Kamichika R., Ishiyama M., Ogawa J. Development of computer-aided process planning system for plate bending by line heating (report 4)-decision making on heating conditions, location, and direction. Journal of Welding Research Institute, 1993, 22(2): 305-313

[16] Ueda K., Murakaw H., Rashwan A.M., Okumoto Y., Kamichika R. Development of computer-aided process planning system for plate bending by line heating (report 1) -relation between final form of plate and inherent strain. Journal of Ship Production, 1994, 10(1): 59-67

[17] Wang J., Liu Y.J., Ji Z.S., Deng Y.P., Guo P.J., Zhou B. Study on the automatic process of line heating for pillow shape plate. Journal of Marine Science and Application, 2006, 5(1): 31-38

[18] Yu G., Masubuchi K., Meakawa T., Patrikalakis N.M. A finite element model of metal forming by laser line heating. 10th International Conference on Computer Applications in Shipbuilding (ICCAS), 2, 1999, Cambridge, Massachusetts: M.I.T., 409-418

[19] Zhang X.B., Ji Z.S., Liu Y.J. Design of convex hull plate forming by pure line heating. Journal of Marine Science and Application, 2004, 3(2): 17-23