Raman spectroscopic stress mapping of carbon nanotube coated single high modulus carbon fibres in compression

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2025-07-06 DOI:10.1016/j.compscitech.2025.111283

Cameron G. Woodgate , David B. Anthony , Richard S. Trask , Milo S.P. Shaffer , Stephen J. Eichhorn

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Abstract

Single walled carbon nanotubes (SWCNTs) can be introduced onto the surface of carbon fibres to modulate stress transfer, introduce functionality, or act as local mechanical sensors. This study explores the effects of such a coating on the micromechanics of single fibre epoxy composites, under compression, using in situ Raman spectroscopy to obtain local and spatial stress maps. These maps can be analysed to quantify interfacial shear stress and show that the introduction of the SWCNTs increases the maximum interfacial shear stress of this carbon fibre epoxy system (M55/M46-DGEBA) from 23 MPa to 45 MPa. There is a corresponding decrease in the critical stress transfer length (from 420 μm to 252 μm), verified by optically measuring mean fragment lengths. The use of SWCNTs as a means to enhance the compressive properties of bulk carbon fibre-based composites is discussed, in the light of these new micromechanics results.

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碳纳米管涂层单根高模量碳纤维压缩时的拉曼应力图

单壁碳纳米管（SWCNTs）可以被引入碳纤维表面，以调节应力传递、引入功能或作为局部机械传感器。本研究探索了这种涂层对单纤维环氧复合材料在压缩下的微观力学的影响，使用原位拉曼光谱获得局部和空间应力图。通过分析这些图，可以量化界面剪切应力，并表明SWCNTs的引入使碳纤维环氧树脂体系（M55/M46-DGEBA）的最大界面剪切应力从23 MPa增加到45 MPa。通过光学测量平均碎片长度证实，临界应力传递长度相应减小（从420 μm减小到252 μm）。根据这些新的细观力学结果，讨论了使用SWCNTs作为增强块状碳纤维基复合材料压缩性能的手段。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.