Evaluating impact damage on carbon fiber-reinforced polymer plates utilizing zero-group-velocity Lamb waves

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2024-07-25 DOI:10.1088/1361-665x/ad6797

Meng Ren, Xiangdi Meng, Mingxi Deng

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Abstract

This paper presents an effective method for evaluating the impact damage of composite plates using zero-group-velocity (ZGV) Lamb waves. A finite element (FE) model of the carbon fiber-reinforced polymer (CFRP) plate is established to analyze in detail the propagation characteristics of the S1-ZGV Lamb wave mode with a specified propagation direction. The study investigates the changes in the S1-ZGV mode with varying damage levels, characterized by a decrease in elastic moduli. Results indicate that as the damage level increases, the corresponding S1-ZGV frequency and amplitude decrease proportionally. The spectral amplitude at the initial S1-ZGV frequency exhibits a consistent and significant decrease with increasing damage levels, offering a reliable method for accurately assessing damage in CFRP plates. Additionally, the S1-ZGV mode of the CFRP plate is experimentally excited using the pitch-catch technique with air-coupled ultrasonic transducers to explore the variations in the S1-ZGV mode with different impact damages. Experimental findings show that the spectral amplitude of the S1-ZGV mode at the initial S1-ZGV frequency decreases monotonically and sensitively with an increasing number of impacts. These experimental results correlate with the FE analysis, validating the effectiveness of accurately evaluating impact damage in CFRP plates based on the spectral amplitude of S1-ZGV modes.

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利用零组速度 Lamb 波评估碳纤维增强聚合物板的冲击损伤

本文提出了一种利用零组速度（ZGV）Lamb 波评估复合材料板冲击损伤的有效方法。本文建立了碳纤维增强聚合物（CFRP）板的有限元（FE）模型，详细分析了具有指定传播方向的 S1-ZGV Lamb 波模式的传播特性。研究调查了 S1-ZGV 模式随不同损伤程度（以弹性模量下降为特征）的变化。结果表明，随着损伤程度的增加，相应的 S1-ZGV 频率和振幅也成比例地减小。初始 S1-ZGV 频率处的频谱振幅随着损坏程度的增加呈现出一致的显著下降，这为准确评估 CFRP 板的损坏情况提供了一种可靠的方法。此外，利用空气耦合超声波传感器的俯仰捕捉技术对 CFRP 板的 S1-ZGV 模式进行了实验激励，以探索 S1-ZGV 模式在不同冲击损伤下的变化。实验结果表明，S1-ZGV 模式在初始 S1-ZGV 频率处的频谱振幅随着撞击次数的增加而单调、敏感地减小。这些实验结果与有限元分析结果相关，验证了根据 S1-ZGV 模式的频谱振幅准确评估 CFRP 板材冲击损伤的有效性。

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

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

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