LAUSR

Abstract Creep properties of ethylene tetrafluoroethylene (ETFE) foils are indispensable for assessing structural behavior of flat-patterning ETFE cushions that use creep strains to achieve desired forms. The understanding of corresponding structural form and force requires a suitable creep model of ETFE foils in accordance with the inflation process. A combined loading and creep model is proposed in this paper. Material experiments and numerical simulations are performed to justify the suitability of this model. The results analysis is composed of stress, displacement and strain. It is obtained that the maximum experimental and numerical stresses are in good agreement. The maximum displacement deviation at 40 °C is within 10% for stress at 12 MPa. These results indicate that this model can predict creep strain of ETFE foils considering stress at high temperature. A further analysis of strain characteristics show that a cross-region area with similar strain values is observed in the specimen.