基于液压胀破测试方法的聚合物防水膜多轴拉伸性能表征  

Multi-axial Tensile Performance Characterization of Polymer Waterproofing Film Based on Hydraulic Bursting Test Method

作　　者：蒋雅君[1] 刘基泰 何雨帝 赵菊梅 王虎群[2] Jiang Yajun;Liu Jitai;He Yudi;Zhao Jumei;Wang Huqun(School of Civil Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;State Key Laboratory of Special Functional Waterproofing Materials,Beijing Oriental Yuhong Waterproof Technology Co.,Ltd.,Beijing 101309,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]北京东方雨虹防水技术股份有限公司特种功能防水材料国家重点实验室,北京101309

出　　处：《中国建筑防水》2024年第5期42-49,共8页China Building Waterproofing

基　　金：国家自然科学基金面上项目(51878570);特种功能防水材料国家重点实验室开放课题(SKLW2018002)。

摘　　要：本研究设计了一种基于液压胀破的多轴拉伸测试装置和数据处理方法,以准确表征聚合物防水膜的拉伸性能。测试结果显示:随着防水膜厚度的增加,拉伸峰值应力降低;随着试件直径的增加,拉伸峰值应力增加;与单轴拉伸相比,多轴拉伸避免了“颈缩”效应,断裂伸长率降低;防水膜的应力-应变曲线符合线性应变强化弹塑性模型,并可通过多轴拉伸试验拟合得到相关参数。结论表明,多轴拉伸方法结果更接近实际工况下的应力-应变响应,可为合理评估防水膜在工程环境中的力学性能提供参考和借鉴。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 

分 类 号：TU761.11[建筑科学—建筑技术科学] TU502