서지주요정보
손상허용을 고려한 복합재 보강 구조물의 구조거동에 관한 연구 = A study on the structural behavior of composite stiffened structure considering damage tolerance
서명 / 저자 손상허용을 고려한 복합재 보강 구조물의 구조거동에 관한 연구 = A study on the structural behavior of composite stiffened structure considering damage tolerance / 공철원.
저자명 공철원 ; Kong, Cheol-Won
발행사항 [대전 : 한국과학기술원, 2000].
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등록번호

8010985

소장위치/청구기호

학술문화관(문화관) 보존서고

DAE 00005

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초록정보

In this study, the structural behavior of composite structures considering damage tolerance was investigated by the finite element analysis and experiments. The impact damage of the stiffened composite plate was predicted by the finite element analysis implemented by modified failure criterion. An improved C-SCAN technique proved the damage prediction for stiffened composite structures. The ply-by-ply delamination predicted by the present analysis showed good agreements with experiments. The buckling and postbuckling strengths for unstiffened composite plates and stiffened composite plates with various impact energies were studied numerically and experimentally. To predict residual strengths, a progressive failure model with the degradation of elastic moduli in the damaged region was adopted in a nonlinear finite element analysis. The progressive failure analysis used the maximum stress criterion and the complete unloading model. The degradation ratio in each sublaminate was determined by delamination distributions through the thickness of laminates. The predicted buckling and postbuckling residual strengths showed good agreements with experiments. The impact damage characteristics and the postbuckling strengths of blade stiffened composite plates were discussed. In experiments, the fiber optic sensor was successfully inserted to the filler of the stiffener with a view to detect buckling and postbuckling behavior. The delamination growth was also observed for I-stiffened composite plates with different impact locations under the cyclic compressive load.

서지기타정보

서지기타정보
청구기호 {DAE 00005
형태사항 vi, 133 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Cheol-Won Kong
지도교수의 한글표기 : 홍창선
지도교수의 영문표기 : Chang-Sun Hong
학위논문 학위논문(박사) - 한국과학기술원 : 항공우주공학전공,
서지주기 참고문헌 : p. 48-55
주제 좌굴
후좌굴
충격
층간분리
보강된 복합재 평판
Buckling
Postbuckling
Impact
Delamination
Stiffened composite plate
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