• 제목/요약/키워드: Stiffened Laminated Composite Panel

검색결과 19건 처리시간 0.03초

보강된 복합적층 원통형패널의 좌굴거동 (Buckling Behavior of Stiffened Laminated Composite Cylindrical Panel)

  • 이종선;원종진;홍석주;윤희중
    • 한국공작기계학회논문집
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    • 제12권5호
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    • pp.88-93
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    • 2003
  • Buckling behavior of stiffened laminated composite cylindrical panel was studied using linear and nonlinear deformation theory. Various buckling load factors are obtained for stiffened laminated composite cylindrical panels with rectangular type longitudinal stiffeners and various longitudinal length to radius ratio, which made from Carbon/Epoxy USN150 prepreg and are simply-supported on four edges under uniaxial compression. Buckling behavior design analyses are carried out by the nonlinear search optimizer, ADS.

The Stacking Sequence Optimization of Stiffened Laminated Curved Panels with Different Loading and Stiffener Spacing

  • Kim Cheol;Yoon In-Se
    • Journal of Mechanical Science and Technology
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    • 제20권10호
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    • pp.1541-1547
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    • 2006
  • An efficient procedure to obtain the optimal stacking sequence and the minimum weight of stiffened laminated composite curved panels under several loading conditions and stiffener layouts has been developed based on the finite element method and the genetic algorithm that is powerful for the problem with integer variables. Often, designing composite laminates ends up with a stacking sequence optimization that may be formulated as an integer programming problem. This procedure is applied for a problem to find the stacking sequence having a maximum critical buckling load factor and the minimum weight. The object function in this case is the weight of a stiffened laminated composite shell. Three different types of stiffener layouts with different loading conditions are investigated to see how these parameters influence on the stacking sequence optimization of the panel and the stiffeners. It is noticed from the results that the optimal stacking sequence and lay-up angles vary depending on the types. of loading and stiffener spacing.

복합적층 평패널의 최소중량화설계 (Minimum Weight Design of Stiffened Laminated Composite Flat Panel)

  • 원종진;이종선;윤희중;홍석주
    • 한국산학기술학회논문지
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    • 제4권3호
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    • pp.159-163
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    • 2003
  • 본 논문에서는 복합적층 평패널의 최소중량화설계를 수행하기 위하여 길이방향 보강재로 보강된 평패널에 축압축 하중이 작용할 경우 좌굴하중을 구한다. 또한 좌굴에 대한 최소중량화설계를 유한차분에너지법을 이용한 선형좌굴이론과 비선형좌굴이론에 의해서 구하고 비선형 탐색 최적설계기법 ADS를 활용하여 해석한다. 복합적층 평패널의 종횡비는 1, 3, 7에 대하여 고려하였다.

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국부 압축력을 받는 스트링거 보강 복합적층 만곡 판넬의 좌굴후 거동해석 (Postbuckling Analysis of laminated composite-stringer stiffened-Curved panels Loaded in Local compression.)

  • 김조권
    • Composites Research
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    • 제13권1호
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    • pp.25-32
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    • 2000
  • 국부압축력을 받는 스트링거 보강 복합적층 만곡 판넬의 좌굴 및 후좌굴 거동을 개발한 유한요소프로그램을 이용하여 해석하였다. 후좌굴 해석은 판넬거동을 세 가지로 나누어 해석하였다. 판넬과 보강재를 모델링 하기 위하여 8절점응축 쉘요소를 도입하고 비선형유한 요소 수식화를 위해 2nd Piola-Kirchhoff 응력텐서와 Lagrangian 변형률 텐서를 채택하였다. 파손 특성을 고려하기 위해 점진적 파손해석을 도입하였다. 국부축하중을 받는 복합적층 만곡 판넬의 좌굴하중 및 좌굴후 극한하중, 국부좌굴과 전체좌굴, 그리고 보강재 영향이 인자별로 해석 비교 된다.

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R형 보강재로 보강된 복합적층 원통형패널의 최소중량화설계 (Minimum Weight Design of Stiffened Laminated Composite Cylindrical Panel with R Type Stiffener)

  • 원종진;이종선;홍석주
    • 한국산학기술학회:학술대회논문집
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    • 한국산학기술학회 2001년도 춘계학술대회 발표논문집
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    • pp.103-107
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    • 2001
  • This study is simulation about buckling behavior under axial compression which is cylindrical panel laminated USN125 and USN150 made by various winding angle. And also this study compare with linear and nonlinear FDEM theory, and FEM theory. To solve the objective function and the design variables, this study use the linear and nonlinear buckling theories or FDEM and nonlinear search optimum design method of ADS for minimum weight design on which stiffened laminated composite cylindrical panel with stiffener that R-type section.

보강복합재료원통셸의 최적설계 (Optimal Design of Stiffened Laminate Composite Cylindrical Shells)

  • 원종진
    • 한국생산제조학회지
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    • 제7권6호
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    • pp.12-18
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    • 1998
  • The optimal design for stiffened laminate composite cylindrical shells under combined loads is studied by a nonlinear mathematical search algorithm. The optimal design is accomplished with the CONMIN. several types of buckling modes with maximum allowable stresses and strains are included as constraints in the optimal design process, such as general buckling, panel buckling with either stringers or rings smeared out, local skin buckling, local crippling of stiffener segments. Rectangular or T type stringers and rectangular rings are used for stiffened laminate composite cylindrical shells.

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보강된 복합적층 원통형패널의 좌굴거동 (Buckling Behavior of Stiffened Laminated Composite Laminated Composite Cylindrical Panel)

  • 원종진
    • 한국공작기계학회:학술대회논문집
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    • 한국공작기계학회 2000년도 춘계학술대회논문집 - 한국공작기계학회
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    • pp.549-554
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    • 2000
  • In this study, using linear and nonlinear deformation theories and by closed-form analysis and finite difference energy methods, respectively, various buckling load factors are obtained for stiffened laminated composite cylindrical panels with rectangular type longitudinal stiffeners and various longitudinal length to radius ratios, which are made from Carbon/Epoxy USN150 prepreg and are simply-supported on four edges under uniaxial compression, and then for them, buckling behavior design analyses are carried out by the nonlinear search optimizer, ADS

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Optimum Shape for Buckling and Post-Buckling Behavior of a Laminated Composite Panel with I-type Stiffeners

  • Lee, Gwang-Rog;Yang, Won-Ho;Sub, Myung-Won
    • Journal of Mechanical Science and Technology
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    • 제16권10호
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    • pp.1211-1221
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    • 2002
  • A shape optimization of stiffener was conducted to increase buckling load or failure load with stiffened laminated composite panel of I-type under compression loading. Design variables are cap length, web length, and/or thickness under the constraint of volume constancy. The objective function is buckling load and failure load of post-buckling based on Tsai-Hill theory using ABAQUS 5.8 for analysis and Optimizer on Broydon-Fletcher Goldfarb-Sharno Method and Augmented Lagrange Multiplier Method. The effects of relative length of a web and a cap of stiffener on buckling load and failure load of post-buckling were investigated with the results of optimum design.

다양한 형태의 보강재로 보강된 원통형패널의 최적설계 (Optimal Design of Stiffened Laminated Composite Cylindrical Panel with Various Types of Stiffeners)

  • 이종선;원종진
    • 한국공작기계학회논문집
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    • 제15권2호
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    • pp.10-15
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    • 2006
  • The optimal design for stiffened laminated composite cylindrical panels under axial compression was studied using linear and nonlinear deformation theories by finite difference energy methods. Various panel structures was made from Carbon/Epoxy USN125 prepreg and considered 3 types stiffeners. Optimal design analyses of panel structure are carried out by the nonlinear search optimizer, ADS. This optimal design results are compared to the FEM result using ANSYS.

유한요소법을 이용한 복합적층판과 보강된 복합적층 패널의 좌굴 및 좌굴후 거동에 관한 연구 (A Study on the Buckling and Postbuckling Behaviors of Laminated Composite Plates and Stiffened Laminated Composite Panels by Finite Element Method)

  • 허성필;양원호;성기득;조명래
    • 한국전산구조공학회논문집
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    • 제12권4호
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    • pp.599-606
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    • 1999
  • 복합 적층 판과 보강 재를 설치한 보강된 복합 적층 패널의 좌굴을 고려한 설계에서, 좌굴이 항상 구조물의 최종 파손을 의미하는 것은 아니므로 이들의 좌굴 및 좌굴 후 거동에 대한 정확한 이해와 연구가 필요하다. 본 연구에서는 유한요소 법을 이용하여 적층 메커니즘과 섬유 배향각, 적층 순서 등이 복합 적층 판과 보강된 복합 적층 패널의 좌굴 및 좌굴 후 거동에 미치는 영향을 체계적으로 해석하였고, 각 변수에 따른 좌굴 및 좌굴 후 거동 특성을 분석하였다.

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