Earticle

초록

영어

This study investigates the thermo-mechanical behavior and residual stress characteristics of friction stir welding (FSW) in an aluminum inverter housing using finite element analysis (FEA). FSW experiments were first conducted under various tool rotation and traverse speed conditions, and temperature histories were measured using K-type thermocouples. The optimal process condition was identified through tensile testing, and the heat input was estimated by comparing experimental and numerical results. The estimated heat source was incorporated into a transient thermal elasto-plastic analysis to evaluate deformation and residual stresses in an inverter housing model. The results indicated that residual stress distributions varied depending on the welding start position. In particular, when welding started at P3 (near thick ribs and bosses) residual stresses were reduced by approximately 30% compared to P1, owing to the higher local stiffness and enhanced heat dissipation that mitigated temperature gradients. Conversely, welding initiated at P1, a flat region with insufficient reinforcement, resulted in higher stress concentrations. These findings confirm that the welding start position significantly influences residual stress behavior in inverter housings and provide fundamental insights for developing residual stress control strategies in FSW of large-scale components.

목차

Abstract
1. 서론
2. FSW 온도 측정 실험
2.1 FSW 온도 측정 실험 조건
2.2 FSW 온도 측정 실험 결과
2.3 인장 시험
3. 열전달 해석
3.1 열원 추정을 위한 해석 모델
3.2 유한요소 모델 생성
3.3 열전달 해석 조건
3.4 열전달 해석 결과
4. 과도 열탄소성 해석
4.1 인버터 하우징 해석 조건
4.2 인버터 하우징 해석 결과
5. 결론
후기
References

키워드

저자

• 조민구 [ Mingoo Cho | School of Mechanical Engineering, Pusan National University/Jinju center, Dongnam Technology Application Division, Korea Institute of Industrial Technology ]
• 김진수 [ Jinsu Kim | Jinju center, Dongnam Technology Application Division, Korea Institute of Industrial Technology ]
• 이훈희 [ Hoon-Hee Lee | Jinju center, Dongnam Technology Application Division, Korea Institute of Industrial Technology ]
• 김지훈 [ Ji Hoon Kim | School of Mechanical Engineering, Pusan National University ] Corresponding Author
• 강성욱 [ Sungwook Kang | Member, Department of Smart Ocean Mobility Engineering, Changwon National University/ ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국기계항공기술학회지(구 한국기계기술학회지) [Journal of the Korean Society of Mechanical and Aviation Technology ]

• 간기

  격월간

• pISSN

  1229-604X

• eISSN

  2508-3805

• 수록기간

  1999~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 550 DDC 620