한국생산제조학회 학술지 영문 홈페이지
[ Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 30, No. 4, pp.308-315
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

윤희찬a ; 노홍준a ; 한영환a ; 임헌봉b ; 양현익c, *
Welding Analysis using Residual Stress and Deformation Generated During Cutting of Plate Structure
Hee-Chan Yoona ; Hong-Jun Noha ; Young-Hwan Hana ; Hun-Bong Limb ; Hyun-Ik Yangc, *
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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Hee-Chan Yoon

Ph. D. in the Department of Mechanical Engineering at Hanyang University.

His research interest is Welding.

E-mail: korea79chan@naver.com

Hong-Jun Noh

Ph. D. in the Department of Mechanical Engineering at Hanyang University.

His research interest is Welding.

E-mail: nohoju86@hanyang.ac.kr

Young-Hwan Han

Ph. D. in the Department of Mechanical Engineering at Hanyang University.

His research interest is Welding.

E-mail: hyh1994@gmail.com

Hun-Bong Lim

Professor in the Department of Mechanical Engineering at Myongji College.

His research interests are Mechanical Design

E-mail: lhb1019@mjc.ac.kr

Hyun-Ik Yang

Professor in the Department of Mechanical Engineering at Hanyang University.

His research interests are Mechanical Design, Offshore Structure Design, Welding Process Optimization

E-mail: skynet@hanyang.ac.kr