Uniaxial tensile mechanical properties of weathering aging ETFE foils
The mechanical properties of ETFE foils after aging in natural environment are the basis for long-term performance evaluation of ETFE structures.In this paper,the aging ETFE foils were selected to carry out the micro-morphology experiments and macro-mechanical tests.The standard values of mechanical parameters were analyzed based on statistical methods.The micro results show that the rough surface morphology and dense cross-section wrinkles existed and that the grain size increased by 7.8％.The breaking strength,yield stress and elastic modulus of aging ETFE foils decreased significantly.The standard values of the yield stress and elastic modulus were 11.73 MPa and 703.2 MPa,which reduced by 14.9％and 13.5％.In general,these results are critical for accurately evaluating long-term performance of ETFE structures.
NETL
NSTL
万方数据
