Rapid identification of the coefficient of moisture expansion of polymer materials by the employment of plates with asymmetric concentration fields

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Journal of Composite Materials Pub Date : 2024-08-27 DOI:10.1177/00219983241268882
Marianne Beringhier, Marco Gigliotti, Paolo Vannucci
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Abstract

The paper pursues the development of a novel methodology for the rapid identification of the diffuso-mechanical properties of polymer materials based on the employment of plates subject to asymmetric moisture concentration fields. The study is carried out on epoxy plate samples equipped with a thin aluminium foil on a surface exposed to the environment to promote asymmetric moisture absorption. The asymmetric moisture fields promote deformations of the plate. Mass gain and plate curvatures are measured as a function of time during conditioning. By using a weakly coupled diffuso-mechanical model: 1D Fick’s diffusion model and 2D plane stress hygroelastic model the diffuso-mechanical properties of the material can be then identified. Due to the chosen size of the experimental samples the present study allows the identification of the coefficient of moisture expansion of the epoxy material. For the material under study, the following values can be identified for saturation mass gain, water diffusivity and coefficient of moisture expansion respectively: 1.67%, 0.025 mm2.h−1, 0.1628.
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利用非对称浓度场板快速确定聚合物材料的湿膨胀系数
本文基于受非对称水分浓度场影响的板材,开发了一种快速识别聚合物材料扩散力学性能的新方法。研究对象是环氧树脂板样品,其表面装有薄铝箔,暴露在环境中,以促进非对称吸湿。非对称湿度场促进板材变形。在调节过程中,测量了质量增加和板的曲率随时间的变化。通过使用弱耦合扩散-机械模型:一维菲克扩散模型和二维平面应力湿弹性模型可以确定材料的扩散力学特性。由于所选实验样品的尺寸,本研究可以确定环氧树脂材料的湿膨胀系数。对于所研究的材料,可以分别确定以下饱和增重值、水扩散率和湿膨胀系数:1.67%、0.025 mm2.h-1、0.1628。
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来源期刊
Journal of Composite Materials
Journal of Composite Materials 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.90%
发文量
274
审稿时长
6.8 months
期刊介绍: Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).
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