Effect of specimen surface area on through-thickness electrical conductivity in unidirectional CFRP laminates with interlayers

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-04-11 DOI:10.1016/j.compositesa.2025.108943

Keiji Ogi , Ryotaro Ozaki , Koichi Mizukami

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Abstract

The through-thickness electrical conductivities of unidirectional carbon fiber-reinforced plastic laminates with interlayers were measured for varying surface areas, and the resulting variability was systematically examined. One large laminate specimen was cut into smaller pieces (divided in half up to 8 times), and the conductivity of each specimen was sequentially measured to examine spatial variations. The variability of the through-thickness conductivity increased with decreasing specimen surface area because of the inhomogeneous distribution of conductive paths in the interlayer, whereas the average conductivity remained approximately constant, except for very small specimens. A probability density function was used to model the conductivity variability with specimen surface area, showing a shift from a log-normal distribution to a normal distribution as surface area increased. In addition, the effect of the number of layers on through-thickness conductivity was discussed.

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试样表面积对单向夹层CFRP复合材料通厚电导率的影响

测量了具有夹层的单向碳纤维增强塑料层压板在不同表面积下的通厚电导率，并对其变异性进行了系统的检测。将一个大的层压试样切成更小的块（分成两半最多8次），并依次测量每个试样的电导率以检查空间变化。由于层间导电路径的不均匀分布，随着试样表面积的减小，通厚电导率的变异性增大，而除了非常小的试样外，平均电导率基本保持不变。使用概率密度函数来模拟电导率随试样表面积的变化，随着表面积的增加，电导率从对数正态分布向正态分布转变。此外，还讨论了层数对通厚电导率的影响。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.