Transactions of the KSME C: Technology and Education (대한기계학회논문집 C: 기술과 교육)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Finite Element Analysis of Dynamic Deformation of Refrigerator's Lower Hinge during Drop Test

냉장고 낙하시 하힌지 동적변형 해석

  • Hong, Seokmoo (Global Technology Center, Samsung Electronics Co. Ltd.) ;
  • Choi, Yong Chan (Global Technology Center, Samsung Electronics Co. Ltd.) ;
  • Eom, Seong-Uk (Global Technology Center, Samsung Electronics Co. Ltd.) ;
  • Kim, Hong Lae (Korea Simulation Technology Co. Ltd.(KOSTECH)) ;
  • Hyun, Hong Chul (Global Technology Center, Samsung Electronics Co. Ltd.)
  • Received : 2014.08.05
  • Accepted : 2014.10.06
  • Published : 2015.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper dynamic deformation of lower hinge of refrigerator is simulated using dynamic finite element analysis while refrigerator is being dropped. The flow stress curves considering velocity dependency of hinge and lower packing material are determined through bending test and compression test at several dropping speeds. The determined material properties and flow stress from reverse engineering were used as input data for refrigerator's drop test using a dynamic finite element analysis software LS-DYNA. Additionally the result between CAE and 3D deformation measurement from real refrigerator drop test are compared and the result shows that the proposed analysis model is very useful to design lower hinge and lower packing endurable to the impulsive drop impact.

본 연구에서는 유한요소해석으로 냉장고 낙하충격에 대한 하힌지의 변형거동을 분석했다. 우선 하힌지 및 하부포장재 동적물성 확보를 위해 각각 속도 별 굽힘시험과 압축시험을 수행했다. 이어 시험에서 얻은 하중-변위곡선과 유사한 거동을 나타내는 하힌지 및 하부 포장재의 유동응력식을 역공학으로 얻었다. 확보한 물성데이터를 이용해 LS-DYNA로 낙하해석을 수행해, 낙하시 냉장고 자체 및 하힌지 변형거동을 분석했다. 최종적으로 3D 측정으로 분석한 실 냉장고 낙하시험으로, 낙하해석 모델의 유효성을 검증했다. 본 연구에서 제시한 해석모델은 추후 하힌지 및 포장재의 내 충격설계 등에 효과적으로 활용될 수 있을 것이다.

Keywords

References

  1. Chung, W. J., Boo, S. W., Chun, S. P. and Kim, D. C., 1995, "Impact Analysis of Electronics," Trans. Korean Soc. Mech. Eng. A, Vol. 35, No. 8, pp. 678-690.
  2. Kim, W. J., Lee, B. Y. and Son, B. S., 2009, "Drop Impact Analysis and Design of a Package of a Microwave Oven," Trans. Korean Soc. Mech. Eng. A, Vol. 33, No. 5, pp. 536-543. https://doi.org/10.3795/KSME-A.2009.33.5.536
  3. Yi, J. W., Ha, D. Y., Lee, S.W., Lim, J. M. and Park, G. J., 2003, "Development of Design System for EPS Cushioning Package of Monitor using Axiomatic Design," Trans. Korean Soc. Mech. Eng. A, Vol. 27, No. 9, pp. 1644-1652. https://doi.org/10.3795/KSME-A.2003.27.10.1644
  4. Kim, C. S., Bae, B. K. and Sung, D, Y., 2010, "Drop Analysis of a Package and Cushion Performance of Drum Washing Machine," Trans. Korean Soc. Mech. Eng. A, Vol. 34, No. 11, pp. 1733-1740. https://doi.org/10.3795/KSME-A.2010.34.11.1733
  5. Kim, J. G., Kim, J.Y. and Kim, H. S., 2009, "Design for Improving Impact Resistance of Microwave Oven Using Drop/Impact Analysis," KSPSE, Vol. 13, No. 3, pp. 53-58.
  6. Kum, D. H., Kim, E. J., Kim, S. D. and Park, S. H., 2005, "Optimal Design for Cushioning Package of a Heavy Electronic Product Using Mechanical Drop Analysis," Korean Society for Noise and Vibration Engineering, Vol. 14, No. 2, pp. 128-135.
  7. Cowper, G. R. and Symond, P. S., 1957, "Strain Hardening and Strain Rate Effect in the Impact Loading of Cantilever Beams," Browns University, Division of Application Mathematics Report
  8. LSTC, "LS/DYNA User's Manual," 1998, ver.950, California.