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| Effect of Temperature on the Permeability of Stratospheric Airship Capsule Material |
| Received:August 30, 2019 Revised:December 10, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.01.002 |
| KeyWord:stratospheric airship permeability micro-mechanics finite element method |
| Author | Institution |
| YUAN Ming-qing |
Shanghai Jiaotong University, Shanghai |
| ZHAO Hai-tao |
Shanghai Jiaotong University, Shanghai |
| CHEN Zheng |
Shanghai Jiaotong University, Shanghai |
| LI Ruo-wei |
Shanghai Jiaotong University, Shanghai |
| CHEN Ji-an |
Shanghai Jiaotong University, Shanghai |
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| Abstract: |
| The paper aims to study the permeability of airship capsule materials and predict whether the airship design meets demands. In this paper, the micro-mechanics finite element method was used to calculate the cross-sectional area of helium leakage path via the micro-crack density and the average crack opening displacement, predict the initial leakage rate of the airship capsule and calculate the variation in leakage rate and pressure of airship capsule at the circadian cycle temperature. Temperature changes lead to changes in pressure difference between inside and outside of the airship and the helium leakage rate. Both the pressure difference between inside and outside of the airship and helium leakage rate were positively correlated with temperature. This method can predict the duration of stratospheric airship in the air and provide a technical support for the design of stratospheric airship. |
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