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聚氯乙烯膜材各向异性超弹性本构模型

Anisotropic hyperelastic constitutive model for PVC coated fabrics
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摘要 为反映聚氯乙烯(PVC)膜材在拉剪耦合应力作用下呈现的大变形、非线性和各向异性等力学特性,基于纤维增强复合材料连续介质力学理论,将应变能解耦为经、纬向纤维束的拉伸变形能和两向纤维束间角度变化产生的剪切变形能,建立了各向异性超弹性本构模型。推导了适用于PVC膜材偏轴拉伸的本构模型表达式,给出了获取模型参数的具体方法,并通过堆载试验进行了验证分析。结果表明:该模型能够很好地预测PVC膜材偏轴拉伸应力.应变曲线,且较CECS158:2015中建议模型的计算精度更高。 Based on the fiber-reinforced continuum mechanics theory,a simple anisotropic hyperelastic constitutive model was proposed to describe the large deformation,highly nonlinear and strongly anisotropic mechanical properties of PVC coated fabrics under tensile-shear coupling stresses.The strain energy of the model was additively decomposed into two parts nominally representing the fiber stretches and fiber-fiber interaction,respectively.The general expression of PVC coated fabrics was derived,and the specific method of obtaining model parameters was presented. The proposed model was verified by vertical loading tests.Results show that the proposed model can predict off-axis stress-strain curves of PVC coated fabrics,and the calculation accuracy is higher than the model recommended by the CECS 158:2015.
作者 徐俊豪 张营营 赵玉帅 周祎 张其林 ZHANG Yingying;ZHAO Yushuai;ZHOU Yi;ZHANG Qilin(Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory for Geomechanics &Deep Underground Engineering,China University of Mining and Technology, Xuzhou 221116,China;Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology,Xuzhou 221116,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;College of Civil Engineering,Tongji University,Shanghai 200092,China)
出处 《建筑结构学报》 EI CAS CSCD 北大核心 2019年第2期198-205,共8页 Journal of Building Structures
基金 国家自然科学基金项目(51678563).
关键词 聚氯乙烯(PVC)膜材 各向异性 超弹性本构关系 拉剪耦合 PVC coated fabric anisotropic hyperelastic constitutive model off-axial tension
作者简介 徐俊豪,出生于1993年,男,博士研究生,主要从事建筑膜结构研究 E-mail:xujunhao_93@cumt.edu.cn;通信作者:张营营,出生于1985年.男.工学博士.教授,主要从事大跨空间结构研究 E-mail:zhangyingying85@163.com
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