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Development of Simplified Finite Element Models for Welded Joints

용접 결합부에 대한 단순화 유한요소 모델 개발

  • Song, Seong-Il (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.) ;
  • Ahn, Sung Wook (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.) ;
  • Kim, Young Geul (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.) ;
  • Kim, Hyun-Gyu (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.)
  • 송성일 (서울과학기술대학교 기계자동차공학과) ;
  • 성욱 (서울과학기술대학교 기계자동차공학과) ;
  • 김영글 (서울과학기술대학교 기계자동차공학과) ;
  • 김현규 (서울과학기술대학교 기계자동차공학과)
  • Received : 2015.05.22
  • Accepted : 2015.07.01
  • Published : 2015.11.01

Abstract

In this paper, we develop simplified finite element (FE) models for butt-, lap- and T-welded joints by performing numerical and experimental experiments. Three-point bending tests of butt- and lap-welded specimens are performed to obtain the stiffness of the specimens and the strains at points near the welding beads. Similarly the stiffness and strains of T-welded specimen are measured by applying a point load at the end of the specimen. To develop simplified FE models, we consider the shape parameters of width, thickness and the angle of weld elements in the numerical simulations. The shape parameters of the simplified FE models are determined by building linear regression models for the experimental data sets.

본 연구에서는 맞대기 용접부, 겹치기 용접부 그리고 T자형 용접부에 대한 해석과 실험 결과를 비교하여 용접부의 단순화 유한요소 모델을 개발하였다. 맞대기와 겹치기 용접에 대한 시험편을 제작하고 3점 굽힘 시험을 통하여 용접 구조물의 강성과 용접 비드 근처의 변형률을 측정하였다. 이와 유사하게 T-자형 용접 시편에 대하여 끝 단에 하중을 부여하고 용접 구조물 강성과 용접 비드 근처의 변형률을 측정하였다. 용접부에 대한 단순화 유한 요소 모델의 형상 변수들을 설정하였고 선형 회귀 분석을 수행하여 실험 결과를 보다 정확히 표현할 수 있는 단순화 유한요소 모델의 형상 변수들을 결정하였다.

Keywords

References

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Cited by

  1. Numerical and experimental analysis of residual stresses in an arc welded lap joint and mapping of the residual stress field to a simplified finite element model vol.31, pp.10, 2017, https://doi.org/10.1007/s12206-017-0937-z