| 摘要: |
| 基于各向异性弹塑性理论,通过等效应力和等效塑性应变反映材料固有的非线性性质,并结合三参数形式的弹塑性屈服函数,提出了1种适用于聚氯乙烯（PVC）涂层织物膜材的非线性各向异性本构模型.为确定本构模型中的待定参数,同时验证该本构模型的适用性,进行了7个偏轴角度（0°、5°、15°、45°、75°、85°和90°）的单轴拉伸试验,并将模型预测结果与试验结果进行对比.结果表明：该本构模型能够较为准确地反映PVC涂层织物膜材拉伸时的非线性应力应变关系,可用来预测PVC涂层织物膜材在拉剪应力共同作用下的力学行为. |
| 关键词: 聚氯乙烯涂层织物膜材 各向异性 非线性 本构关系模型 偏轴角度 |
| DOI：103969/j.issn.1007 9629202005015 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（51678563）；徐州市应用基础研究计划项目（KC18062）；工程结构性能演化与控制教育部重点实验室开放基金资助项目（2019KF 3）；徐州市重点研发计划项目（Y2217） |
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| Nonlinear Anisotropic Constitutive Model of PVC Coated Fabric Membrane |
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XU Shanshan1, ZHANG Yingying1, XU Junhao1, CHU Shihai2
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1.Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, China;2.Jiangsu Cheng Yi Residential Industrial Technology Development Co., Ltd., Xuzhou 221131, China
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| Abstract: |
| Based on the theory of anisotropic elastoplasticity, a nonlinear anisotropic constitutive model for PVC coated fabric membrane was proposed. It is based on the inherent nonlinearity of material represented by equivalent stress and equivalent plastic strain, and combined with the three parameter elastoplastic yield function. In order to determine the parameters of the constitutive model and to verify the applicability of the model, uniaxial tensile tests in 7 off axial directions(0°,5°,15°,45°,75°,85° and 90°) were carried out. By comparing the predicted results of the model with the tensile test results, it is found that the constitutive model can accurately reflect the non linear stress strain relationship of the PVC coated fabric membrane. It can be used to predict the mechanical behavior of the PVC coated fabric membrane under the combined action of tension and shear stress. |
| Key words: PVC coated fabric membrane anisotropic nonlinear constitutive model bias angle |
