대한용접접합학회:학술대회논문집 (Proceedings of the KWS Conference)

대한용접접합학회 (The Korean Welding and Joining Society)
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A STUDY ON THE MECHANICAL CHARACTERISTICS OF RESISTANCE MULTI-SPOT WELDED JOINTS WITH PITCH LENGTH

  • Bang, Han-Sur (Department of Naval Architecture and Ocean Engineering, Chosun University) ;
  • Bang, Hee-Seon (Department of Production and Manufacturing, Chosun University) ;
  • Joo, Sung-Min (Graduate School, Department of Naval Architecture and Ocean Engineering, Chosun University) ;
  • Chang, Woong-Seong (Welding & Structural Integrity Research Team, Research Institute of Industrial Science& Technology) ;
  • Lee, Chang-Woo (Department of Naval Architecture and Ocean Engineering, Ulsan College)
  • 발행 : 2002.10.01
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초록

For clarifying the mechanical phenomena of thermal elasto-plastic behavior on the multi-spot welded joints, this study has tried to carry out three-dimensional thermal elasto-plastic analysis on them. However, because the shape of multi-spot welded joints is not axi-symmetric, unlike the case of single-spot welded joint, the solution domain for simulation should be three-dimensional. Therefore, in this paper, from the results analyzed using the developed the three dimensional unstationary heat conduction and thermal elasto-plastic programs by an iso-parametric finite element method, mechanical characteristics and their production mechanism on single- and multispot welded joints were clarified. Moreover, effects of pitch length on temperature, welding residual stresses and plastic strain of multi-spot welded joints were evaluated, indicating that a pitch of 30mm was advantageous compared to a pitch of 15mm.

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