Modelling the effects of preheating on angular distortions in one sided fillet welds

• Autorzy: Sadat Ali M. , Rao S. , Rao N.
• Języki publikacji: EN

Abstrakty

EN

In all fusion welded joints, residual, transverse, lateral, angular and bowing deformations are observed. In fillet joints the angular distortion is the predominant deformation. The distortions and thermal history of a fillet joint can be measured experimentally which is not economically viable all times. It is time consuming and the deformation can be measured only after the completion of the joining process. So prevention is not possible. In the present work a numerical elasto-plastic thermo mechanical model has been developed for predicting the thermal history and resulting angular distortions of manual metal arc welding in one sided fillet joints. To create a realistic simulation of the single sided fillet welding, a moving distributed heat source is used in finite element model. The effect of filler metal deposition is simulated by implementing a birth and death process for the elements. The temperature dependent material properties are used for predicting the transient temperature distribution in the material which in turn helps to predict the angular distortion profiles of the fillet joint. The simulated modeling results obtained are found to be in complete agreement with the experimental values.

Słowa kluczowe

EN

finite element analysis; Manual Metal arc welding; transient thermal analysis; temperature distribution; element birth and death method; thermomechanical analysis; angular distortions

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 578--583
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Sadat Ali M.

• Centurion University of Technology & Management, Paralakhemundi- 761 211, Gajapati, Odisha, India

autor

Rao S.

• Department of Mechanical Engineering, AU College of Engineering. VISAKHAPATNAM 530 045 AP, India

autor

Rao N.

• Centurion University of Technology & Management, Paralakhemundi- 761 211, Gajapati, Odisha, India

Bibliografia

• [1] S. Hirai, I. Nakamura, Research on angular change in fillet welds, Ishikawajima Review (1955) 59-68.
• [2] C. Taniguchi, Out-of-plane distortion caused by fillet welds in aluminum, Massachusetts Institute of Technology, Master’s thesis, MIT, Cambridge, 1972.
• [3] V. Kamala, J.A. Goldak, J. Weld, Error due to two dimensional approximation in heart transfer analysis of welds, Welding Journal 72/9 (1993) 440-446.
• [4] S. Brown, H. Song, Implication of three imensional numerical simulations of welding large structures, Welding Journal 71/2 (1992) 55-62.
• [5] C.L. Tsai, W.T. Cheng, Welding distortion of thin-plate panel structures, Welding Journal 78/5 (1999) 156-165.
• [6] C.L. Tsai, G.H. Jung, Plasticity-based distortion analysis for fillet welded thin-plate T-joints, Welding Journal 83/6 (2004) 177-187.
• [7] T.L. Teng, C.P. Fung, P.H. Chang, W.C. Yang, Analysis of residual stresses and distortions in T-joint fillet welds, Welding Journal 78/8 (2001) 523-538.
• [8] A.K. Pathak, G.L. Datta, Three-dimensional finite element analysis to predict the different zones of microstructure in submerged arc welding, Journal of Engineering Manufacture 218 (2004) 269-280.