A simple model describing the non-linear biaxial tensile behaviour of PVC-coated polyester fabrics for use in finite element analysis
A simple model describing the non-linear biaxial tensile behaviour of PVC-coated polyester fabrics for use in finite element analysis
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DOI：
10.1016/j.compstruct.2009.04.016
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发表时间：
2009-10-01
影响因子：
6.3
通讯作者：
Luchsinger, R. H.
中科院分区：
文献类型：
--
作者：
Galliot, C.;Luchsinger, R. H.
提出了一个简单的模型，根据实验观察的纱线平行双轴拉伸的PVC涂层聚酯织物十字形标本。考虑了现场荷载条件。材料的行为被假定为平面应力正交各向异性的一个特定的负载比，而弹性性能可以随负载比，以代表经纱和纬纱之间的复杂的相互作用。实验发现，弹性模量和归一化的负载比之间的线性关系的PVC涂层的聚酯（I型到IV型）的范围很广。引入了两个与模量变化相对应的新参数，以补充现有的平面应力正交各向异性模型。理论结果表明，只有五个双轴试验所需的准确描述与建议的材料模型的材料响应。最后，将模型集成到商业有限元软件中。结果表明，所提出的材料模型显着提高了精度的有限元预测相比，标准的同素异性线性材料模型，几乎相同的计算时间。(C)2009爱思唯尔有限公司保留所有权利。
A simple model based on experimental observations of the yarn-parallel biaxial extension of PVC-coated polyester fabric cruciform specimens is proposed. In situ loading conditions are considered. The material behaviour is assumed to be plane stress orthotropic for a particular load ratio, while the elastic properties can vary with the load ratio in order to represent the complex interaction between warp and fill yarns. A linear relationship is experimentally found between elastic moduli and normalized load ratios for a wide range of PVC-coated polyester (Type I to Type IV). Two new parameters corresponding to the moduli variations are introduced to complement the existing plane stress orthotropic model. Theoretical results show that only five biaxial tests are required to accurately describe the material response with the proposed material model. Finally, the model was integrated in a commercial finite element software. It is shown that the proposed material model significantly increases the accuracy of the finite element predictions compared to the standard allotropic linear material model with almost identical computation times. (C) 2009 Elsevier Ltd. All rights reserved.