Transactions of Materials and Heat Treatment

Title：Influence of embedded optical fiber sensor on bending properties for carbon fiber laminates

Authors： Hu Yubo1 Lang Lihui1 Yan Dongdong1 Qin Chengwei2 Shi Zhiyuan2

Unit： 1.School of Mechanical Engineering & Automation Beihang University 2.Bogie Technology Center CRRC Tangshan Co. Ltd.

KeyWords： carbon fiber laminate embedded optical fiber sensor optical fiber protective sleeve bending test bending strength modulus

ClassificationCode：TB332

year,vol(issue):pagenumber：2023,48(3):54-60

Abstract：

For the coating peeling problem that often occurs in the formation of carbon fiber laminates embedded with optical fiber, the role of embedded protection for optical fibers in the forming process of carbon fiber laminates was studied by a set of comparative tests, and the influences of number and direction of embedded optical fibers on the bending properties and failure modes of carbon fiber laminates were studied by three-point bending tests. The results show that the maximum loss of bending strength and modulus caused by the number of embedded optical fibers are 8.5% and 14.3%, respectively. When the optical fiber is embedded along the direction of carbon fiber, the bending strength and modulus are decreased by 5.2% and 13.1% respectively in the optical fiber bundle group with the same optical fiber extrusion direction. However, when the optical fiber grating is embedded in composite material along the vertical direction of carbon fiber, an eye-shaped composite structure is formed around the optical fiber, and the bending strength and modulus are slightly improved with an increasing range of about 2.5%, which has the effect of a certain reinforcing phase.

Funds：

河北省省级科技计划资助项目（24300002021107005）

作者简介：胡宇博（1999-），男，硕士研究生 E-mail：sy2107304@buaa.edu.cn 通信作者：郎利辉（1970-2022），男，博士，教授 E-mail：huyubo93@163.com

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