Nonlinear structural performance analysis of ETFE cushion in form-developing by inflation method through flat-patterning

作者：Yin, Yue; Hu, Jianhui; Chen, Wujun^*; Zhao, Bing; Yang, Deqing

来源：Journal of Building Structures, 2018, 39(3): 12-18.

DOI：10.14006/j.jzjgxb.2018.03.002

• EFFE cushion
• Ethylene tetrafluoroethylene
• Flat-patterning
• Laser displacement sensors
• Mechanical nonlinearities
• Membrane displacement
• Stress-strain relationships
• Structural performance analysis

An experiment on flat-patterning-based ETFE (ethylene-tetrafluoroethylene) cushion was conducted. Laser displacement sensors were used to measure the rises of ETFE cushion and the stress distributions were calculated using the shape geometry obtained from 3D photo grammetry. The Peirce model was applied to reflect the property of the material mechanical nonlinearity of the ETFE foil, and numerical simulation was performed to replicate the process of inflation. The rise of the ETFE cushion and the stress distributions obtained from the numerical simulation were compared with the test results. The results show that the Peirce model gives good prediction on the stress-strain relationship of ETFE foils, except in the location between the two yield points. The final rise of the ETFE cushion reaches about 172 mm, where the maximum stress points of ETFE cushion are located at the mid-span of each edge. The discrepancies related to the membrane displacement, stress and strain between the numerical and experimental results are less than 10%. In addition, the numerical simulation shows that plastic strains exist under an internal pressure of 2 kPa, and the maximum total strain and plastic strain of the ETFE cushion are located at the membrane center and the mid-span of each edge.

• 出版日期2018
• 单位上海交通大学; 海洋工程国家重点实验室