성층권 비행선 기낭 막재료에 대한 비선형 거동 연구
Non-Linear Behavior Analysis for Stratospheric Airship Envelope
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
본 논문에서는 평직구조를 갖는 성층권 비행선 기낭의 하중막재에 대한 비선형 유한요소 해석 결과를 기술하였다. 평직구조를 갖는 하중막재의 미세구조를 3차원적으로 구현하였고, Updated Lagrangian 방법을 사용하여 기하학적 비선형성을 고려하였다. 계산결과, 큰 변형률에서 비선형해석으로부터 얻은 응력-변형률 곡선은 선형해석의 결과와 큰 차이를 보였다. 또한 응력-변형률 곡선으로부터 얻은 비선형 탄성계수 값은 선형 탄성계수보다 큰 값을 보였는데 그 차이는 섬유의 굴곡도가 작은 경우 더욱 두드러지게 나타났다.
Abstract
In this paper, geometrically non-linear finite element analyses were performed to study the mechanical behavior of the material system of the envelope of stratospheric airships. The microstructure of the load-bearing plain weave layer was identified and modeled. The Updated Lagrangian formulation was employed to consider the geometric non-linearity as well as the induced structural non-linearity for the fiber tows. The stress-strain behavior was predicted and the effective elastic modulus was calculated by numerical experiments. It was found the non-linear stress-strain curves were largely different from those by linear analysis. And non-linear elastic moduli were much higher than linear elastic moduli. The difference was more distinguishable when the tow waviness ratio was smaller.
참고문헌 (10)
- "Airship Technology" (1999), Cambridge University Press
- "특보: 비행선의 구조 및 재료", 29(2), pp.141~151 (2001)
- "비행선용 막구조 설계기법 연구", pp.224~227 (2002), 한국복합재료학회
- "Failure Behavior of Plain Weave Fabric Laminates under On-Axis Uniaxial Tensile Loading", 30(16), pp.1779~1822 (1996)
- "Nonlinear Behavior of Woven Fabric Composites Journal of Composite Materials", 17, pp.399~413 (1983)
- "Geometrical and Material Nonlinear Properties of Two-Dimensional Fabric Composite", 25, pp.107~113 (1987)
- "Developments of Membrane Structure Under Tension and Its Vibration Properties Proceedings of 28th Space Sciences and Technology Conference Japan Society of Space and Aeronautical Sciences", pp.566~567
- "Finite Element Procedures" (1996), Prentice-Hall International Inc.
- "Non-Linear Finite Element Analysis of Solids and Structures" (1991), John-Wiley & Sons Ltd.
- "Mechanics of Composite Materials Journal of Composites Technology & Research", 11, pp.3~14 (1989)