Experimental study on the vibrational response and damping of short fibre/unidirectional PEEK hybrid composites

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composite Structures Pub Date : 2024-06-07 DOI:10.1016/j.compstruct.2024.118264

James Pheysey , Natalia Mazancova , Francesco De Cola , David Garcia Cava , Francisca Martinez-Hergueta

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Abstract

This study investigates the vibrational performance of a new generation of hybrid composites based on a short fibre core for structural dynamic applications. The dynamic characterisation was conducted through dynamic mechanical analysis (DMA) and the free vibration of a cantilever beam at different lengths. The short fibre composite exhibited a superior specific damping capacity, producing a maximum damping of 0.42. The values extracted from DMA indicated no visco-plastic contribution from the PEEK resin system, implying that the internal microarchitecture drives the material damping, with friction at the fibre/matrix interface being the primary dissipation mechanism. The hybrid laminate presented an improvement in damping performance of 39% due to the addition of the short fibre core compared to a baseline quasi-isotropic laminate of similar flexural stiffness. These findings show hybridisation’s advantages in designing structural components with improved damping performance and reduced cost for a variety of dynamic applications in industries such as automotive.

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短纤维/单向 PEEK 混合复合材料振动响应和阻尼实验研究

本研究探讨了基于短纤维芯的新一代混合复合材料在结构动态应用中的振动性能。通过动态力学分析（DMA）和不同长度悬臂梁的自由振动进行了动态表征。短纤维复合材料表现出卓越的特定阻尼能力，产生的最大阻尼为 0.42。从 DMA 提取的数值表明，PEEK 树脂系统没有产生粘弹性，这意味着内部微结构驱动了材料阻尼，纤维/基质界面的摩擦是主要的耗散机制。与弯曲刚度相似的基线准各向同性层压板相比，由于增加了短纤维芯，混合层压板的阻尼性能提高了 39%。这些研究结果表明，在汽车等行业的各种动态应用中，杂化在设计具有更佳阻尼性能和更低成本的结构部件方面具有优势。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.