纺织学报 ›› 2019, Vol. 40 ›› Issue (05): 53-58.doi: 10.13475/j.fzxb.20180503006

• 纺织工程 • 上一篇    下一篇

基于主成分分析的智能复合材料结构损伤类型识别

万莉1(), 贡丽英2, 贾敏瑞2   

  1. 1.天津医科大学 教务处, 天津 300070
    2.天津工业大学 信息化中心, 天津 300387
  • 收稿日期:2018-05-14 修回日期:2019-02-12 出版日期:2019-05-15 发布日期:2019-05-21
  • 作者简介:万莉(1990—), 女, 助教,硕士。主要研究方向为三维复合材料计算机的检测技术等。E-mail: wanli@tmu.edu.cn。
  • 基金资助:
    教育部博士点基金课题项目(200800580004);天津市教委社会重大项目(2017JW2D28)

Structural damage identification of intelligent composite materials based on principal component analysis

WAN Li1(), GONG Liying2, JIA Minrui2   

  1. 1. Academic Affairs Office, Tianjin Medical University, Tianjin 300070, China
    2. Information Center, Tianjin Polytechnic University, Tianjin 300387, China
  • Received:2018-05-14 Revised:2019-02-12 Online:2019-05-15 Published:2019-05-21

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摘要：

针对三维编织复合材料制件结构状态监控的关键问题,提出了基于三维六向编织工艺将碳纳米管纱线嵌入到整体复合材料制件中,构建三维空间结构的智能复合材料的方法,利用损伤指数实现了对智能复合材料制件内部损伤类型的识别,并分析了4组三维六向编织智能复合材料制件的损伤指数表现特征。结果表明:综合损伤指数优于其他3种损伤指数,综合损伤指数可精确识别制件内部损伤的类型;对于三维编织复合材料制件内部空隙类微小损伤,综合损伤指数监测值小于100;对于制件内部裂纹的损伤,综合损伤指数监测值位于300~500;当综合损伤指数监测值大于600时,可判断为试件存在大裂口损伤;基于损伤指数可计算制件内部损伤大小,精度可达到0.073 mm。

关键词: 智能编织复合材料, 三维六向编织, 主成分分析, 碳纳米管线传感器, 损伤指数

Abstract:

Aiming at the key problems in monitoring the structural state of three-dimensional braided composites, a method to build three-dimensional space-structured intelligent composite material was developed by embedding carbon nanotube yarns into the overall composites based on the three-dimensional six-directional braiding process. The damage index was adopte to realize the identification of the internal damage type of the intelligent composite specimen. For the internal damage of three-dimensional six-directional braided composite materials, four damage index performance characteristics were analyzed. Experiments show that combined damage index is better than the other three damage indexes and combined damage index can accurately identify the type of damage within the specimen. The three-dimensional braided composite material has small internal void damage and the combined damage index is less than 100. For internal crack damage of the composite specimen, combined damage index monitoring value is 300-500. When the combined damage index monitoring value is greater than 600, it can be judged that a large crack damage exists in the test specimens. Based on the damage index, the internal damage of the specimen can be calculated and the precision can reach 0.073 mm.

Key words: intelligent braided composite, three-dimensional six-directional braiding, principal component analysis, carbon nanotube yarn sensor, damage index

中图分类号: 

  • TS101.2

图1

三维编织复合材料制件损伤监测示意图"

图2

三维编织机示意图"

图3

三维六向携纱器排布规律示意图"

图4

嵌入碳纳米管纱线的三维六向复合材料预制件"

图5

基于PCA的复合材料内部损伤监测流程图"

表1

三维编织复合材料试件参数"

编号 平均编织角/(°) 纤维体积含量/% 密度/(g·cm-3)
1# 30.4 57.1 1.55
2# 32.8 56.5 1.73
3# 29.5 52.1 1.64
4# 38.7 54.3 1.54

图6

试件样本"

图7

T2损伤指数图"

图8

Q损伤指数图"

图9

Phi损伤指数图"

图10

I损伤指数图"

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