In situ compressive behavior of carbon fibers reinforced PolyEtherEther Ketone laminates exposed to one-sided heat flux

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES
Benoit Vieille, Alexis Coppalle
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引用次数: 0

Abstract

This study investigates the influence of a combined thermal heat flux (imposed by a cone calorimeter) and a compressive loading on the deformation and damage mechanisms within quasi-isotropic carbon fibers reinforced PolyEtherEther Ketone laminates. Thermogravimetric Analyses conducted at increasing heating rates under nitrogen (from 5 to 500°C/min) provide valuable information on the thermal decomposition of C/PEEK that ranges from 550°C to 627°C, with a corresponding mass loss ranging from 20 to 26%. From the thermo-mechanical coupling standpoint, the softening and the thermal decomposition of the PEEK matrix under a 50 kW/m2 heat flux result in the micro-buckling of fibers bundles in matrix-rich areas at the ply scale. Ultimately, it leads to the formation and propagation in the transverse direction of plastic kink bands at the laminates scale. Post-failure observations show that this macroscopic kinking propagates specifically according to the PEEK matrix pyrolysis.
暴露于单侧热流的碳纤维增强聚醚醚酮层压板的原位压缩行为
本研究探讨了热通量(通过锥形量热仪施加)和压缩载荷对准各向同性碳纤维增强聚醚醚酮层压板变形和损坏机制的影响。在氮气环境下以不断增加的加热速率(从 5°C 至 500°C /分钟)进行的热重分析提供了有关 C/PEEK 热分解的宝贵信息,其温度范围为 550°C 至 627°C,相应的质量损失范围为 20% 至 26%。从热机械耦合的角度来看,在 50 kW/m2 的热通量下,PEEK 基体的软化和热分解导致纤维束在层级上基体丰富的区域发生微弯曲。最终导致塑性扭结带在层压板横向形成和传播。失效后的观察结果表明,这种宏观扭结是根据 PEEK 基质热解情况而发生的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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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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