| Summary |
In our researchs ,using FEM analysis, the target is to clarify the behavior of ETFE film sheets. ETFE film shows both of elasto-plastic and visco-elastic behaviors. The authors have carried out studies focusing on these characteristics. In this paper, through experimental and numerical analysis, we will focus on visco-elastic characteristics when temperatures change during uniaxial tension. First, the incremental constitutive equations which takes into account the change in amount of strain due to change in temperature is proposed. These constitutive equations are extension of the previous nonlinear incremental visco-elastic constitutive equations for biaxial tensions. Yet, they are in a format that can be used in FEM analysis. |