Mesh Independent 3-D Modeling of Spot Welded Joints using Finite Elements with Embedded Strong Discontinuities

Jongheon Kim

doi:10.7734/COSEIK.2017.30.4.283

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2017 Vol.30, Issue 4 Preview Page Next Page

Mesh Independent 3-D Modeling of Spot Welded Joints using Finite Elements with Embedded Strong Discontinuities 강한 불연속이 내장된 유한요소를 이용한 스폿 용접 접합의 망 독립적 삼차원 모델링

2017. pp. 283-288

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Abstract

A spot welded joint is modeled using 3-D finite elements with embedded strong discontinuities. The spot weld is represented by a special cohesive law on the embedded discontinuity surface, instead of meshing its geometry. This strategy naturally eliminates the need of adaptive FEM meshes fitting the local geometry of the spot weld. Mesh independent solutions are guaranteed by explicitly modeling the detailed shape of the spot weld, which is in contrast with the exiting approach using point constraints for the spot weld.

Keywords

spot weld

embedded strong discontinuity

cohesive law

adaptive mesh

mesh independency

스폿 용접 접합의 삼차원 모델링을 위하여 강한 불연속이 내장된 유한요소를 사용하였다. 스폿 용접의 기하학적 형상을 유한요소망 대신 요소에 내장된 불연속 면에서의 특수한 응집 법칙을 이용하여 표현하였다. 이를 통하여 기존의 적응적 유 한요소망을 이용하는 접근법과 달리 스폿 용접의 국부적인 형상에 독립적인 유한요소망을 구성할 수 있다. 또한, 스폿 용접 의 형상을 명시적으로 고려하여 모델링함으로써 기존의 점 구속조건을 이용하는 접근법과 달리 망 독립적인 해를 얻을 수 있다.

키워드

스폿 용접

내장된 강한 불연속

응집 법칙

적응적 유한요소망

망 독립

References

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 30
No :4
Pages :283-288
Received Date : 2017-06-15
Revised Date : 2017-07-31
Accepted Date : 2017-08-03
DOI :https://doi.org/10.7734/COSEIK.2017.30.4.283

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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