한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제21권4호
  • /
  • Pages.1-13
  • /
  • 2022
  • /
  • 1598-6721(pISSN)
  • /
  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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냉장고 캐비닛 벽면에서 발생하는 박리현상 예측을 위한 평가 기준 개발에 관한 연구

Development of Criteria for Predicting Delamination in Cabinet Walls of Household Refrigerators

  • Park, Jin Seong (Dept. of Mechanical Engineering, National Korea Maritime & Ocean University) ;
  • Kim, Sung Ik (Dept. of Mechanical Engineering, National Korea Maritime & Ocean University) ;
  • Lee, Gun Yup (Advanced Technology 1Team, LG Electronics) ;
  • Cho, Jong Rae (Dept. of Mechanical Engineering, National Korea Maritime & Ocean University)
  • 투고 : 2021.10.25
  • 심사 : 2022.01.28
  • 발행 : 2022.04.30
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초록

Household refrigerator cabinets must undergo cyclic testing at -20 ℃ and 65 ℃ for quality control (QC) after their production is complete. These cabinets were assembled from different materials, including acrylonitrile butadiene styrene (ABS), polyurethane (PU) foam, and steel plates. However, different thermal expansion values could be observed owing to differences in the mechanical properties of the materials. In this study, a technique to predict delamination on a refrigerator wall caused by thermal deformation was developed. The mechanical properties of ABS and PU foams were tested, theload factors causing delamination were analyzed, delamination was observed using a high-speed camera, and comparison and verification in terms of stress and strain were performed using a finite element model (FEM). The results indicated that the delamination phenomenon of a refrigerator wall can be defined in two cases. A method for predicting and evaluating delamination was established and applied in an actual refrigerator. To determine the effect of temperature changes on the refrigerator, strain measurements were performed at the weak point and the stress was calculated. The results showed that the proposed FEM prediction technique can be used as a basis for virtual testing to replace future QC testing, thus saving time and cost.

키워드

과제정보

This research was funded by LG Electronics Co., Ltd., the Ministry of Education's National Research Foundation, and the BK21 project.

참고문헌

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