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Meso-Scale Tearing Mechanism Analysis of Flexible Fabric Composite for Stratospheric Airship via Experiment and Numerical Simulation

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Abstract

Stratospheric airships are controllable lighter-than-air aircraft and have great potential application in surveillance and communication. The envelopes, one of the main structures of a stratospheric airship, are generally made of flexible fabric composites to be lightweight, high strength, capable of containing lifting gas, and resistant to the harsh stratospheric environment. The composites, however, are prone to tearing. Hence, their tearing behavior has attracted great attention. This paper explores the meso-scale tearing mechanism of an envelope and the temperature influence on its tear strength via experiment and numerical simulation. Biaxial tear tests were conducted on cruciform specimens, which were contacted with liquids (cold alcohol or hot water) at different temperatures including −25, 20, 50, 80 °C. The specimens’ tear stresses were measured and the meso-scale tearing behavior was captured with a microscope. Besides, a novel finite element analysis model based on truss and spring elements was established to simulate the tearing behavior. It was found that the simulation result has a relative agreement with the tests. The simulation results show that the maximum tear stress of the envelope drops by 39.62% as the temperature rises from −60°Cto 80°C and the tensile properties of yarns and matrix account for stress concentration around a crack tip. This work deeply reveals the meso-scale tearing mechanism of the envelope and provides a valuable reference for exploring tearing properties of flexible fabric composites.

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Authors and Affiliations

  1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China

    Yonglin Chen  (陈永霖) & Gongyi Fu  (付功义)

  2. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xiaoliang Wang  (王晓亮)

  3. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai, 200092, China

    Weidong Yang  (杨伟东)

  4. Aerospace System Engineering Shanghai, Shanghai, 201109, China

    Weicheng Xie  (谢炜程)

Authors
  1. Yonglin Chen  (陈永霖)
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  2. Weidong Yang  (杨伟东)
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  3. Weicheng Xie  (谢炜程)
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  4. Xiaoliang Wang  (王晓亮)
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  5. Gongyi Fu  (付功义)
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Corresponding author

Correspondence to Gongyi Fu  (付功义).

Additional information

Foundation item: the National High Technology Research and Development Program of China (No. 2016YFB1200200), and the National Natural Science Foundation of China (No. 51906141)

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Chen, Y., Yang, W., Xie, W. et al. Meso-Scale Tearing Mechanism Analysis of Flexible Fabric Composite for Stratospheric Airship via Experiment and Numerical Simulation. J. Shanghai Jiaotong Univ. (Sci.) 27, 873–884 (2022). https://doi.org/10.1007/s12204-022-2431-8

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  • DOI: https://doi.org/10.1007/s12204-022-2431-8

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