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Tearing Properties Investigation of a New Airship Envelope Fabric Based on Single Edge Notched Film Experiment

WANG FENGXIN, CHEN YONGLIN, FU GONGYI, HUANG XIAOHUI, YANG JUN, ZHANG LIWEI, XU JIANDONG

Abstract


In the present work, a new phenomenal model is proposed for modeling and simulation of tearing mechanical properties on an airship envelope fabric. The greatest advantage of the phenomenal model is that such model is capable of calculating the tear strength of a plain weave fabric by simply uniaxial tearing tests rather than the expensive and complex pressurized cylinder tests. The geometric progression technique is employed to calculate the stress distribution on the crack tip. The stress transfer coefficient Q is derived to be 0.9656. Three types of SEN specimens are researched during the uniaxial tearing tensile tests. The effects of specimen width and the crack length ratio on the tear strength of the airship envelope fabric is studied thoroughly. A good agreement between such model and experimental data are obtained, and the deviation is lower than 5%. Meanwhile, compared with the new phenomenal model and the Thiele’s formula, this new phenomenal model is verified to be more accurate while calculating the tear strength of a plain weaving airship envelope fabric in the uniaxial tearing tensile load.


DOI
10.12783/asc2017/15380

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