锻压技术

嵌入式光纤传感器对碳纤维层合板弯曲性能的影响

英文标题：Influence of embedded optical fiber sensor on bending properties for carbon fiber laminates

单位：1.北京航空航天大学机械工程及自动化学院 2. 中车唐山机车车辆有限公司转向架技术中心

分类号：TB332

出版年,卷(期):页码：2023,48(3):54-60

摘要：

针对光纤嵌入碳纤维层合板成形中常出现的涂覆层脱落问题，用一组对比试验研究了光纤的嵌入保护在碳纤维层合板成形过程中的作用；通过三点弯曲试验研究了光纤嵌入数量、嵌入方向对碳纤维层合板弯曲性能和失效模式的影响。结果表明：光纤的嵌入数量引起的碳纤维层合板抗弯强度和模量的最大损失分别为8.5%和14.3%；沿纤维方向嵌入光纤时，在光纤挤入方向相同的纤维束群中，抗弯强度和模量分别降低5.2%和13.1%；而当光纤光栅垂直于纤维方向嵌入复合材料内部时，光纤周围形成眼状复合结构，抗弯强度和模量均略有提升，增幅约为2.5%，起到一定的增强相的效果。

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.

基金项目：

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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