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https://hdl.handle.net/2440/131660
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Type: | Conference paper |
Title: | Numerical simulation on micro-damage detection in cfrp composites based on nonlinear ultrasonic guided waves |
Author: | Jiang, C. Li, W. Deng, M. Ng, C.T. |
Citation: | Proceedings of the 8th Asia-Pacific Workshop on Structural Health Monitoring (8APWSHM), as published in Materials Research Proceedings, 2021, vol.18, pp.325-330 |
Publisher: | Materials Research Forum LLC |
Publisher Place: | USA |
Issue Date: | 2021 |
Series/Report no.: | Materials Research Proceedings; 18 |
ISBN: | 9781644901304 |
ISSN: | 2474-3941 2474-395X |
Conference Name: | Asia-Pacific Workshop on Structural Health Monitoring (9 Dec 2020 - 9 Dec 2020 : Cairns, QLD, Australia) |
Statement of Responsibility: | Chang Jiang, Weibin Li, Mingxi Deng and Ching-Tai Ng |
Abstract: | Micro-damages such as pores, closed delamination/debonding and fiber/matrix cracks in carbon fiber reinforced plastics (CFRP) are vital factors towards the performance of composite structures, which could collapse if defects are not detected in advance. Nonlinear ultrasonic technologies, especially ones involving guided waves, have drawn increasing attention for their better sensitivity to early damages than linear acoustic ones. The combination of nonlinear acoustics and guided waves technique can promisingly provide considerable accuracy and efficiency for damage assessment and materials characterization. Herein, numerical simulations in terms of finite element method are conducted to investigate the feasibility of micro-damage detection in multi-layered CFRP plates using the second harmonic generation (SHG) of asymmetric Lamb guided wave mode. Contact acoustic nonlinearity (CAN) is introduced into the constitutive model of micro-damages in composites, which leads to the distinct SHG compared with material nonlinearity. The results suggest that the generated second order harmonics due to CAN could be received and adopted for early damage evaluation without matching the phase of the primary waves. |
Keywords: | Nonlinear Guided Waves; Composites; Micro-Damage; Random Defects |
Rights: | Copyright © 2021 by authors. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
DOI: | 10.21741/9781644901311-39 |
Published version: | https://www.mrforum.com/product/shm-8apwshm/ |
Appears in Collections: | Aurora harvest 4 Civil and Environmental Engineering publications |
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