复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (5): 21-30.DOI: 10.19936/j.cnki.2096-8000.20210528.003

• 基础研究 • 上一篇    下一篇

纤维增强复合材料中多分层损伤的识别研究

黄梅, 潘静雯, 江剑, 张芝芳*   

  1. 广州大学 广州大学-淡江大学工程结构灾害与控制联合研究中心,广州510006
  • 收稿日期:2020-08-21 出版日期:2021-05-28 发布日期:2021-08-04
  • 通讯作者: 张芝芳(1985-),女,博士,副研究员,主要从事复合材料损伤识别和健康监测方面的研究,zfzhang@gzhu.edu.cn。
  • 作者简介:黄梅(1993-),女,硕士生,主要从事复合材料损伤识别方面的研究。
  • 基金资助:
    国家自然科学基金项目(51508118);广东省自然科学基金项目(2019A1515011116)

ASSESSMENT OF MULTIPLE DELAMINATIONS IN FIBER REINFORCED COMPOSITES

HUANG Mei, PAN Jing-wen, JIANG Jian, ZHANG Zhi-fang*   

  1. Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou 510006, China
  • Received:2020-08-21 Online:2021-05-28 Published:2021-08-04

摘要: 本文基于纤维增强复合材料(FRP)层合板受冲击后可能在多个界面发生重叠分层损伤的工程背景,研究利用多层损伤发生前后的一系列模态频率变化值来预测FRP层合板中的多分层损伤。首先分别采用两种方法构建了含分层损伤的FRP层合板的有限元模型并验证了模型的准确性,其中,分层损伤被模拟为多层椭圆形态。然后,采用有限元模型生成了不同的多分层情况下对应的频率变化值,通过基于代理模型的遗传算法(SAGA)和支持向量机(SVM)两种逆向检测算法来识别多分层的界面、位置与大小。多分层损伤案例的验证结果表明,两种逆向检测算法SAGA和SVM均能利用损伤发生前后的频率变化值成功识别FRP层合板内的多分层损伤。

关键词: 纤维增强复合材料, 多损伤, 频率, 损伤识别, 分层

Abstract: In this paper, based on the engineering background of fiber reinforced composite (FRP) laminates that may undergo overlapping delamination damage at multiple interfaces after impact, a series of modal frequency changes before and after the occurrence of the multiple delaminations are used to predict the damage in FRP laminates. Firstly, the finite element model of FRP laminates with delaminations were constructed and validated using experimental results in literature. The multiple delaminations was simulated as a shape of ellipse. Then the finite element model is used to generate the corresponding frequency changes in different scenarios of multiple delaminations, which was feed into two inverse detection algorithms, the genetic algorithm (SAGA) and support vector machine (SVM), for predicting the interface, location and size of the multiple delaminations. Numerical validations show that both inverse algorithms SAGA and SVM can successfully identify the multiple damage in FRP laminates through the frequency changes due to the multiple damage.

Key words: fiber reinforced composites, multiple damages, frequency, damage identification, delamination

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