- 摘 要
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（華東建筑設(shè)計研究院有限公司， 上海 200011）
［摘要］利用長條形試件，分別對1～4層、兩種厚度的PTFE膜材進行了單軸拉伸試驗，得到了相應(yīng)的破壞形式、應(yīng)力-應(yīng)變曲線和抗拉強度。結(jié)果表明，單層與多層PTFE膜材試件破壞形式主要表現(xiàn)為斜截面撕裂破壞和平截面斷裂破壞，膜材的抗拉強度隨著層數(shù)的增加呈線性增加規(guī)律?；谠囼灲Y(jié)果，提出了多層PTFE膜材的抗拉強度計算公式，為多層PTFE膜材的工程應(yīng)用和相關(guān)規(guī)范修編提供了理論依據(jù)。
［關(guān)鍵詞］PTFE膜材； 多層膜； 抗拉強度； 強度折減系數(shù)
中圖分類號：TU398-7文獻標(biāo)識碼：A文章編號：1002-848X(2018)14-0113-04
Experimental study on tensile strength of multilayer PTFE coated fabrics
Cui Jiachun
(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200011, China)
Abstract:Uniaxial extension experiments were carried out on PTFE coated fabrics long strip specimens with two different thicknesses and 1~4 layers separately, to obtain corresponding failure modes, stress-strain curves and tensile strengths. The results show that, the mainly failure modes of single-layer and multilayer PTFE coated fabrics feature oblique section tearing failure and plane section fracture failure, and the tensile strength of PTFE coated fabrics increases linearly with the number of layers. Based on the experimental results, a formula for calculating the tensile strength of multilayer PTFE coated fabrics was proposed to provide theoretical basis for engineering application and revision of relevant codes of multilayer PTFE coated fabrics.
Keywords:PTFE coated fabrics; multilayer membrane; tensile strength; reduction coefficient of strength
作者簡介：崔家春，博士，高級工程師，Email: jiachun_cui@arcplus.com.cn。
