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| Experimental and Numerical Investigations of FormDevelopment of Ethylene-Tetrafluoroethylene Cushion Based on FlatPatterning |
| ZHAO Bing1，CHEN Wujun1，HU Jianhui1，QIU Zhenyu1,SONG Hao2，CAI Jing2
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| (1. Space Structures Research Centre, Shanghai Jiaotong University, Shanghai 200240, China;
2. Shanghai Taiyo Kogyo Co. Ltd., Shanghai 200030, China) |
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Abstract Abstract： An equilateral triangle ethylenetetrafluoroethylene (ETFE) cushion model with a side length of 2.5 m was developed based on the design method of flatpatterning. The experimental model was performed with a formdeveloping test, which was controlled and measured combining automatic pressure control, photogrammetry and laser sensor. The whole process of formdeveloping included an inflation from 0 kPa to 2 kPa, a viscoelastic creep under 2 kPa lased for 24 h, and a recovery under 0 kPa within 24 h. Some original parametric data, such as internal pressure values, shapes of upper layer and rises of lower layer were obtained. The stress distributions under different conditions were calculated based on the shapes. Some profound material mechanical properties and structural behaviors, such as elastic deformation, viscoelastic creep and creeprecovery, were revealed via the comparisons of results between experiments and numerical simulations. These results demonstrate the applicability, which will improve the popularization and application of ETFE cushion structure.
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Received: 07 March 2015
Published: 28 March 2016
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