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Calculation of Welding Deformations by Simplified Thermal Elasto-plastic Analysis

Seo Sung Il    (Korea Railroad Research Institute  );
  • 초록

    Welding deformations injure the beauty of appearance of a structure, decrease its buckling strength and prevent increase of productivity. Welding deformations of real structures are complicated and the accurate prediction of welding deformations has been a difficult problem. This study proposes a method to predict the welding deformations of large structures accurately and practically based on the simplified thermal elasto-plastic analysis method. The proposed method combines the inherent strain theory with the numerical or theoretical analysis method and the experimental results. The weld joint is assumed to be divided into 3 regions such as inherent strain region, material softening region and base metal region. Characteristic material properties are used in structural modeling and analysis for reasonable simplification. Calculated results by this method show good agreement with the experimental results. It was proven that this method gives an accurate and efficient solution for the problem of welding deformation calculation of large structures.


  • 주제어

    inherent strain .   large structure .   efficient numerical method .   simplified thermal elasto-plastic analysis .   welding deformation.  

  • 참고문헌 (13)

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    6. Ueda, Y. and T. Yamakawa. 1973. Analysis of thermal elasto-plastic behavior of metals during welding by finite element analysis method. J. of the Japanese Welding Society, 42,6,567-577 
    7. Fujimoto, T. 1971. Residual stresses in rectangular plates with slit-type butt welded joint. J. of the Japanese Welding Society, 40, 5, 459-473 
    8. Moshaiov, A. and W.S. Vorus. 1987. The mechanics of the frame bending process: theory and applications. J. of Ship Research, 31, 4, 269-281 
    9. Swanson Analysis System Inc. 1992. ANSYS User's Manual. Houston, Pennsylvania 
    10. Jang, C.D. and S.1. Seo. 1995. A simplified method to estimate longitudinal deformations of built-up beams due to welding and heating. J. of Ship Research, 39, 2, 176-183 
    11. Satoh, K. and T. Terasaki. 1976. Effect of welding conditions on welding deformations in welded structural materials. J. of the Japanese Welding Society, 45, 4, 302-308 
    12. Timoshenko, S.P. and S. Woinowsky-Krieger. 1970. Theory of Plates and Shells. McGrawHill, 180-185 
    13. Seo, S.1. and C.D. Jang. 1999. A study on the prediction of deformations of welded ship structures. J. of Ship Production, 15,2, 73-81 

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