Experimental Investigation of Bonding Quality for CFRP Bonded Structures with Thick Adhesive Layers Based on Ultrasonic Transmission Coefficient Spectrums

IF 2.6 3区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Journal of Nondestructive Evaluation Pub Date : 2023-12-21 DOI:10.1007/s10921-023-01029-6

Yongkun Li, Yan Lyu, Bin Wu, Jie Gao, Zeqi Bian, Cunfu He

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Abstract

The experimental study of ultrasonic transmission coefficient measurement method was carried out for the problem of bonding quality inspection of bonded structures of composites with thick adhesive layer. For the uniaxial CFRP bonded specimens, the ultrasonic waves’ phase velocity distribution and the ultrasonic transmission coefficient spectrums were measured by the water-immersion ultrasonic transmission method. Then their complex elastic constants were inversed by the particle swarm optimization algorithm based on simulated annealing. Based on this, CFRP bonded specimens in perfect bonding status and having single weak bonding interface, dual weak bonding interfaces were manufactured. Then the ultrasonic transmission coefficient spectrums were measured, and the distinction of bonding quality between different bonding specimens was predicted. At the same time, according to the shift characteristics of the measured ultrasonic transmission coefficient spectra, the influence of the symmetry of the CFRP bonded structures with thick adhesive layers on the ultrasonic transmission coefficient spectrums was investigated experimentally. In addition, by comparing the time-domain and coefficient spectra characteristics of transmitted waves, the advantage of using the coefficient spectrum measurement method in bonding quality detection was expounded.

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基于超声波传输系数频谱的厚粘合层 CFRP 粘合结构粘合质量实验研究

针对厚胶层复合材料粘接结构的粘接质量检测问题，开展了超声波透射系数测量方法的实验研究。对于单轴 CFRP 粘合试样，采用水浸超声波透射法测量了超声波的相位速度分布和超声波透射系数谱。然后利用基于模拟退火的粒子群优化算法对其复合弹性常数进行反演。在此基础上，制作了完全粘接状态、单弱粘接界面、双弱粘接界面的 CFRP 粘合试样。然后测量超声波透射系数谱，预测不同粘接试样之间的粘接质量区别。同时，根据测量到的超声波透射系数谱的偏移特征，实验研究了厚粘合层 CFRP 粘合结构的对称性对超声波透射系数谱的影响。此外，通过比较透射波的时域特征和系数谱特征，阐述了在粘接质量检测中使用系数谱测量方法的优势。

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来源期刊

Journal of Nondestructive Evaluation 工程技术-材料科学：表征与测试

CiteScore

4.90

自引率

7.10%

发文量

审稿时长

9 months

期刊介绍： Journal of Nondestructive Evaluation provides a forum for the broad range of scientific and engineering activities involved in developing a quantitative nondestructive evaluation (NDE) capability. This interdisciplinary journal publishes papers on the development of new equipment, analyses, and approaches to nondestructive measurements.