In this study,a multi-axial tensile testing device and data processing method based on hydraulic bursting are designed to accurately characterize the tensile properties of polymer waterproofing film.The test results show that the peak tensile stress decreases with the increase of film thickness;the peak tensile stress increases with the increase of the test piece diameter.Compared with uniaxial tensile,multi-axial tensile avoids the"necking"effect and decreases the elongation at break.The stress-strain curve of the waterproofing film conforms to the elastic-plastic model of linear strain strengthening,and the relevant parameters can be obtained by multi-axial tensile test.It is concluded that the results of multi-axial tensile method are closer to the stress-strain response under actual working conditions,which can provide reference for reasonable evaluation of mechanical properties of waterproofing film in engineering environment.
关键词
聚合物防水膜/多轴拉伸/液压胀破/应力-应变曲线/本构模型
Key words
polymer waterproofing film/multi-axial tensile/hydraulic bursting/stress-strain curve/constitutive model
维普
万方数据