Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Analysis of Angular Deformation in Multi-pass Butt Joint Welding of Thick Plates with X-shape Grooves using the Finite Element Method

X형 개선을 가진 후판 맞대기 용접에 있어서 유한요소법을 이용한 각변형 해석

  • 양영수 (전남대학교 기계공학과) ;
  • 배강열 (경남과학기술대학교 메카트로닉스공학과)
  • Received : 2018.03.27
  • Accepted : 2018.05.17
  • Published : 2018.08.31
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Abstract

Removal of angular deformation induced during the welding of butt joints in thick steel plates needs expert skill and is costly. To reduce deformation, proper joint designs are studied with a prediction of deformation prior to welding. However, as the thickness of a plate increases, a predictive analysis of the welding process is more difficult, especially if there is an increase in the number of welding passes in the joint. In this study, a numerical model with the finite element method (FEM) was developed to analyze the angular deformation in the multi-pass welding of butt joints of plates made of AH32 steel that had a thickness of up to 100 mm. A series of numerical simulations were then performed based on the developed model to predict the deformations for thick plates. With the results obtained by the analyses, this study suggested optimal X-shape grooves for the butt joints of thick plates to minimize the angular deformation. As the thickness of the plate increased to 100 mm, the ratio of the depth of the front-side groove to that of the back-side groove should be gradually increased to nearly 1:3.

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References

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