Abstract Accurate and concise constitutive model of biaxial tensile behavior is urgently needed for the analysis of complex membrane structure engineering. A new constitutive model is developed to describe the tensile behaviors of coated fabrics from pre-tension to breaking. The shrinkage curve is employed for the first time and stress-ratio dependence coefficient (SDC) is proposed to represent the proportion of elongation and shrinkage in biaxial monotonic tensile test. The deformation of cruciform specimen is considered as the result of the coupling effect of biaxial tension and Poisson effect. Excellent fitting results were obtained between the data points of biaxial tensile test and stress-stress-strain response surface, which R-squares of both warp and weft response surface were 0.995.

中文翻译：

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一种新的建筑织物双轴拉伸行为本构模型

摘要 复杂膜结构工程分析迫切需要准确、简洁的双轴拉伸行为本构模型。开发了一种新的本构模型来描述涂层织物从预张力到断裂的拉伸行为。首次采用收缩率曲线，提出应力比相关系数（SDC）来表示双轴单调拉伸试验中伸长率和收缩率的比例。十字形试样的变形被认为是双轴张力和泊松效应耦合作用的结果。双轴拉伸试验数据点与应力-应力-应变响应面拟合结果良好，经纬向响应面的R平方均为0.995。