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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제7권 제4호
발행연도
1999.4
수록면
217 - 227 (11page)

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초록· 키워드

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An investigation has been performed to study the response of the front bumper beam of an automobile. The primary concern of the investigation is to present a procedure of how to design the cross-sectional shape of the front bumper of an automobile. In the investigation, a beam theory is used to model the front bumper, and a principle of energy conservation is also used for calculating the deflection and stress distribution of the bumper subjected to the external impact. The model of the bumper consist of the straight beam on the elastic foundation to consider the polyurethane attached to the bumper, and the curved beam with a constant radius of curvature supported by the bracket. Using the finite element method, the behavior of the modeled beam is compared with that of the shell structures to which 3 dimensional brick elements representing the polyurethane are attached. After the verification of the modeled beam, the deformation and the stresses of the bumper are calculated when the automobile equipped with the bumper is subjected to the front impact. For the calculation, the initial kinetic energy of the impacting body is assumed to be transformed into the elastic deformation energy of the bumper and the reduced kinetic energy of the whole system. The energy method is compared with the impact analysis using the finite element method. Finally, the design analysis using the modeled bumper beam and the energy method is performed to design the optimal cross-sectional shape of the bumper minimizing the total weight with the constraint conditions that no plastic deformation occurs in the bumper. Using the presented procedure, a designer can choose easily and quickly the optimal cross-sectional shape of the bumper for an automobile with the given specifications.

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ABSTRACT

1.서론

2.해석어론

3.결과 및 검토

4.결론

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