서지주요정보
축예하중이 알루미늄/복합재료 하이브리드의 샤프트의 비틀림 피로 특성에 미치는 영향 = Effects of axial preload on the torsional fatigue characteristics of aluminum/composite hybrid shafts
서명 / 저자 축예하중이 알루미늄/복합재료 하이브리드의 샤프트의 비틀림 피로 특성에 미치는 영향 = Effects of axial preload on the torsional fatigue characteristics of aluminum/composite hybrid shafts / 김종운.
저자명 김종운 ; Kim, Jong- Woon
발행사항 [대전 : 한국과학기술원, 2004].
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소장정보

등록번호

8014918

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 04020

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Power transmission shafts such as drive shafts or automotive propeller shafts should transmit static and dynamic torques without whirling vibration. Hybrid shafts composed of unidirectional fiber-reinforced composite and metal have high fundamental bending natural frequency as well as high torque transmission capability: composite increases the fundamental bending natural frequency due to its high specific stiffness, while metal such as aluminum or steel transmits the required torque However, fabrication-induced thermal residual stresses are developed during manufacturing hybrid shafts due to the coefficient difference of thermal expansion of the composite and the metal so that the high residual stresses reduce fatigue resistance of the hybrid shafts, especially at low operating temperatures. In this thesis, the torsional fatigue characteristics of the aluminum/composite co-cure joined hybrid shafts were investigated with respect to axial preload. To change the thermal residual stresses, an axial compressive preload was given to the aluminum tube by a compressive jig during the co-cure bonding operation. In order to determine the thermal residual stresses with respect to the preload and temperature difference, the stress analyses of the hybrid shaft were performed by simple equations from mechanics of materials and finite element method. Then the static torque capacities and fatigue strengths of the hybrid shafts from the static and fatigue torsional tests were correlated with the calculated thermal residual stresses. From the investigation, it was found that the fatigue strength of the hybrid shaft was much improved by the axial compressive preload, exceeding that of a pure aluminum shaft. Also, the degradation of the fatigue resistance of the hybrid shaft at subzero operating temperature could be overcome by the axial compressive preload.

서지기타정보

서지기타정보
청구기호 {MME 04020
형태사항 vi, 60 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jong-Woon Kim
지도교수의 한글표기 : 이대길
지도교수의 영문표기 : Dai-Gil Lee
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 30-31
주제 축예하중
하이브리드 샤프트
복합재료
잔류응력
비틀림 피로
Axial preload
Hybrid shaft
Composite material
Residual stress
Torsional fatigue
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