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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33 , No. 1

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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 4, pp. 308-315
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Aug 2021
Received 07 May 2021 Revised 10 Jun 2021 Accepted 19 Jul 2021
DOI: https://doi.org/10.7735/ksmte.2021.30.4.308
판구조물의 절단에서 발생하는 잔류변형을 적용한 용접해석
윤희찬^a ; 노홍준^a ; 한영환^a ; 임헌봉^b ; 양현익^c^{, *}



Welding Analysis using Residual Stress and Deformation Generated During Cutting of Plate Structure
Hee-Chan Yoon^a ; Hong-Jun Noh^a ; Young-Hwan Han^a ; Hun-Bong Lim^b ; Hyun-Ik Yang^c^{, *}
aDepartment of Mechanical Design Engineering, Hanyang University
bDepartment of Mechanical Design Engineering, Myongji College
cDepartment of Mechanical Engineering, Hanyang University
Correspondence to : ^*Tel.: +82-31-400-5285 E-mail address: skynet@hanyang.ac.kr (Hyun-Ik Yang).

Abstract

Cutting and welding are essential processes in constructing complex steel structures. In these processes, local heating and cooling generate strains and stresses in the cut and welded areas, resulting in deformation of the entire structure. To accurately predict the welding deformation of the model, it is necessary to consider the effects of previous cutting. In this study, thermal conduction analysis was used to derive the temperature history via cutting and bead-on-plate welding. Additionally, temperature history was applied to thermal–elastic–plastic analysis of welds while cutting. When applied to large structures, a simplified analysis was performed. Thus, the thermal–elastic–plastic analysis results were applied in a shell structure as equivalent shrinkage and moment, and elastic analysis was performed. Through this study, it was confirmed that cutting influenced the final welding deformation. Further, the suitability of the simplified method for analyses of large structures was verified.


Keywords: Laser cutting, Heat conduction analysis, Thermal-elastic-plastic analysis, Inherent strain, Welding distortion, Simplified method

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