Multi-functional application of recycled carbon fibres in hybrid composites for notch sensitivity reduction and damage monitoring

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-08-21 DOI:10.1016/j.compstruct.2025.119574

Fan Zhang , Ting Yang Ling , Liudi Jiang , Yonggang Zhang , Khong Wui Gan

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引用次数: 0

Abstract

It is challenging to reuse recycled carbon fibres (rCF) alone as reinforcement material in composites for structural application due to its discontinuous and non-aligned fibre architecture. This study investigates innovative usage of rCF when hybridized with other reinforcement fibres in a hybrid composite for multi-functional application. A rCF non-woven is embedded in an E-glass fabric composite laminate to demonstrate its multi-functionality in open-hole specimens with various hole sizes under monotonic tensile loading. Instead of brittle failure, the rCF fails in a progressive manner due to the in-situ effect offered by the neighbouring glass fibre sublaminates. Following damage initiation in the rCF layer, delamination takes place along the rCF and glass fabric interfaces, enabling stress redistribution around the hole. This leads to reduced stress concentration, resulting in a notch-insensitive hybrid composite when compared to the non-hybrid glass fabric composite. By monitoring the change in electrical resistance of the rCF layer, the progressive damage events around the hole can be inferred. Regardless of the hole size, a simple damage self-sensing system can be developed to inform the damage severity of the hybrid composite. In this study, the rCF layer gives a damage tolerant notched composite and simultaneously offers damage monitoring functionality.

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再生碳纤维在杂化复合材料中降低缺口灵敏度和损伤监测的多功能应用

由于再生碳纤维具有不连续和不连续的纤维结构，因此将其单独用作复合材料的结构增强材料具有一定的挑战性。本研究探讨了rCF与其他增强纤维在多功能混合复合材料中杂交的创新用途。将rCF无纺布嵌入e -玻璃纤维复合材料层压板中，在单调拉伸载荷下，展示其在不同孔尺寸的裸眼样品中的多功能性。由于邻近的玻璃纤维亚层板提供的原位效应，rCF以渐进的方式破坏，而不是脆性破坏。在rCF层发生损伤后，沿rCF和玻璃织物界面发生分层，使应力在孔周围重新分布。与非杂化玻璃织物复合材料相比，这导致应力集中降低，从而产生缺口不敏感的杂化复合材料。通过监测rCF层电阻的变化，可以推断出孔周围的渐进损伤事件。无论孔的大小如何，都可以开发出一种简单的损伤自感知系统来告知复合材料的损伤严重程度。在本研究中，rCF层提供了一种可容忍损伤的缺口复合材料，同时提供了损伤监测功能。

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

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.