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Non-Linear Behavior Analysis for Stratospheric Airship Envelope  

Suh Young Wook (충북대학교 구조시스템공학과 대학원)
Woo Kyeongsik (충북대학교 구조시스템공학과)
Publication Information
Composites Research / v.18, no.2, 2005 , pp. 30-37 More about this Journal
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.
Keywords
성층권 비행선의 기낭;하중막;평직;기하학적 비선형성;
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