한국자동차공학회논문집 (Transactions of the Korean Society of Automotive Engineers)

  • 제18권1호
  • /
  • Pages.58-65
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  • 2010
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  • 1225-6382(pISSN)
  • /
  • 2234-0149(eISSN)
한국자동차공학회 (The Korean Society of Automotive Engineers)
권호 표지

동적 유한요소해석을 이용한 Dent 발생에 대한 연구

An Analysis of Dent Formation by Dynamic Finite Element Method

  • 차성훈 (서울산업대학교 NID융합대학원) ;
  • 신명수 (서울산업대학교 NID융합대학원) ;
  • 김종봉 (서울산업대학교 자동차공학과)
  • Cha, Sung-Hoon (Graduate School of NID Fusion Technology, Seoul National University of Technology) ;
  • Shin, Myoung-Soo (Graduate School of NID Fusion Technology, Seoul National University of Technology) ;
  • Kim, Jong-Bong (Department of Automotive Engineering, Seoul National University of Technology)
  • 투고 : 2009.03.05
  • 심사 : 2009.07.07
  • 발행 : 2010.01.01
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초록

For the improvement of fuel consumption, the study on the use of lightweight material or thinner sheet have been carried out in automotive industry. With the need for the use of thinner sheet, the dent resistance became one of the major concern in th design of exterior panels in automotive industry. Many studies have been carried out for the dent resistance by experiment or quasi-static numerical simulation. In this study, the dent formation behavior is investigated by dynamic finite element analysis using ABAQUS. Dent formation may be affected by many factors such as sheet thickness, material properties, pre-strain, and sheet curvature. The effect of these factors on dent resistance is investigated. From the analysis following three conclusions are derived. First, dent resistance become hard as the sheet curvature radius increases. Second, dynamic dent resistance is mainly affected by bending stress rather than tensile stress. Third, the pre-strain itself do not give any guidance for dynamic dent resistance and dynamic dent resistance have to be decided considering the strain hardening and thickness reduction together. The results are considered to be reliable and useful to improve the dent damage of automotive panels.

키워드

참고문헌

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