서지주요정보
자동차 구조용 복합재료 충격흡수봉에 관한 연구 = A study on the composite impact beams for an auto-body
서명 / 저자 자동차 구조용 복합재료 충격흡수봉에 관한 연구 = A study on the composite impact beams for an auto-body / 전성식.
저자명 전성식 ; Cheon, Seong-Sik
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8010327

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 99050

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

The fuel efficiency and emission gas regulation of passenger cars are two important issues nowadays. The best way to increase fuel efficiency without sacrificing safety is to employ fiber reinforced composite materials in the body of cars since fiber reinforced composite materials have higher specific strength and stiffness than those of steels. Moreover, polymeric resin based fiber reinforced composites have high damping capacity and low coefficient of thermal expansion. In this thesis, the impact behaviors of composite specimens were investigated using an instrumented Charpy impact tester with respect to fiber volume fraction, moisture content, resin type, surface treatment of fibers, dissimilar embedded materials (such as polyethylene fabric, polypropylene fabric, not-silane-treated glass fibers and Kevlar 29 fibers). Also, the impact energy absorption characteristics of composites were analyzed by considering fiber breakage, fiber pull-out and delamination. Then, the progressive impact fracture model was proposed to calculate the impact energy absorption characteristics of real size composite structures as well as composite test specimens. For an example of real size composite structures, composite side impact beams were designed and manufactured using glass fiber reinforced composite materials since metals usually have lower capacity of impact absorption energy at low temperature. The optimum fiber stacking sequence and cross section for the composite impact beams were determined by static tests and finite element analyses using ABAQUS, a commercial software (H.K.S. Inc.). To obtain the dynamic impact behavior of impact beams, a pneumatic impact tester with 30 miles per hour (13.3m/s) impact speed was developed. The impact tester was equipped with measuring sensors and was interfaced with a personal computer through analog digital converter. Using the developed tester, both the AISI 4340 steel impact beams and the composite ones were tested in the temperature range of -50 to 25℃ to measure impact absorption charcateristics and NDT (Nil ductility temperature) of materials.

서지기타정보

서지기타정보
청구기호 {DME 99050
형태사항 xi, 153 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Seong-Sik Cheon
지도교수의 한글표기 : 이대길
지도교수의 영문표기 : Dai-Gil Lee
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 144-153
주제 복합재료 충격흡수봉
섬유부피분율
공압식 충격시험기
충격파괴진전모델
Composite impact beams
Fiber volume fraction
Pneumatic impact tester
Progressive impact fracture model
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