基于单/双轴加载实验的 PVDF 膜机械性能

Q1 Arts and Humanities
Liu Ping, Bai-Jian Tang, WenRui Li, C. Ngamkhanong
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引用次数: 0

摘要

最近,性能良好的复合 PVDF 膜因其巨大的应用潜力而引发了人们的极大兴趣。然而,机械性能的不确定性限制了其应用。本文利用 SH-1050P 膜织物的单轴拉伸试验,揭示了经向和拉伸方向之间加载角的弹性模量特性。此外,还进行了不同加载比的双轴拉伸试验。单轴和双轴延展载荷-位移/应力-应变曲线均有特色。这是首次使用理论方法建立弹性模量与加载角度之间的关系,该方法基于纱线和垫布之间不存在滑动和褶皱的假设。此外,还对不同的织物参数进行了模拟,以验证理论结果。主要发现是,单轴载荷下的弹性模量可分为两个阶段,即弹性和塑性。这两个阶段都与加载角度两倍的正弦函数成正比。SH-1050P 纺织品的泊松比可视为固定值 0.11。这一结论可推广到类似的纺织品。本文的成果有助于加深对 PVDF 膜机械行为的理解,并对其在不同加载条件下的响应提出了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mechanical behavior of PVDF membrane based on the uni-/bi-axial loading experiments
Recently, composite PVDF membranes with good performance have triggered enormous interest because of their great potential application. However, the uncertainty of mechanical properties limits their application. Herein, this paper reveals the elastic modulus properties of the loading angle between warp and tensile direction using the uni-axial tensile test of SH-1050P membrane textile. In addition, the bi-axial tensile test with different loading ratios was implemented. Both uni-axial and bi-axial ductile load-displacement/stress-strain curves are featured. It is the first to establish a relationship between the elastic modulus and the loading angle using a theoretical method based on the assumption that there is no slippage and crease between yarns and matric. Furthermore, simulations with different textile parameters were carried out to verify the theoretical results. The key finding is that the elastic modulus under uni-axial load can be divided into two stages, which are elasticity and plasticity. Both of which are proportional to the sine function applied to two times the loading angle. The Poisson’s ratio of SH-1050P textile can be considered as a fixed value of 0.11. This conclusion can be extended to similar textiles. The outcome of this paper contributes to a deeper understanding of the PVDF memrane’s mechanical behavior and presents a novel insight into its response to different loading conditions.
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来源期刊
International Journal of Space Structures
International Journal of Space Structures Arts and Humanities-Conservation
CiteScore
2.00
自引率
0.00%
发文量
21
期刊介绍: The aim of the journal is to provide an international forum for the interchange of information on all aspects of analysis, design and construction of space structures. The scope of the journal encompasses structures such as single-, double- and multi-layer grids, barrel vaults, domes, towers, folded plates, radar dishes, tensegrity structures, stressed skin assemblies, foldable structures, pneumatic systems and cable arrangements. No limitation on the type of material is imposed and the scope includes structures constructed in steel, aluminium, timber, concrete, plastics, paperboard and fabric.
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