Projects per year
Abstract
This paper is aimed at developing a theoretical model able to predict the generation of nonlinear elastic effects associated to the interaction of ultrasonic waves with the steady-state nonlinear response of local defect resonance (LDR). The LDR effect is used in nonlinear elastic wave spectroscopy to enhance the excitation of the material damage at its local resonance, thus to dramatically increase the vibrational amplitude of material nonlinear phenomena. The main result of this work is to prove both analytically and experimentally the generation of novel nonlinear elastic wave effects, here named as nonlinear damage resonance intermodulation, which correspond to a nonlinear intermodulation between the driving frequency and the LDR one. Beside this intermodulation effect, other nonlinear elastic wave phenomena such as higher harmonics of the input frequency and superharmonics of LDR frequency were found. The analytical model relies on solving the nonlinear equation of motion governing bending displacement under the assumption of both quadratic and cubic nonlinear defect approximation. Experimental tests on a damaged composite laminate confirmed and validated these predictions and showed that using continuous periodic excitation, the nonlinear structural phenomena associated to LDR could also be featured at locations different from the damage resonance. These findings will provide new opportunities for material damage detection using nonlinear ultrasounds.
Original language | English |
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Title of host publication | Health Monitoring of Structural and Biological Systems, 2017 |
Editors | T. Kundu |
Publisher | SPIE |
ISBN (Electronic) | 9781510608252 |
DOIs | |
Publication status | Published - 5 Apr 2017 |
Event | Health Monitoring of Structural and Biological Systems 2017 - Portland, USA United States Duration: 26 Mar 2017 → 29 Mar 2017 |
Publication series
Name | Proceedings od SPIE |
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Volume | 10170 |
Conference
Conference | Health Monitoring of Structural and Biological Systems 2017 |
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Country/Territory | USA United States |
City | Portland |
Period | 26/03/17 → 29/03/17 |
Keywords
- Composite Materials
- Damage Detection
- Nonlinear Ultrasounds
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Fingerprint
Dive into the research topics of 'A novel nonlinear damage resonance intermodulation effect for structural health monitoring'. Together they form a unique fingerprint.Projects
- 2 Finished
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Nonlinear Ultrasonic Stimulated Infrared Thermography (NUSIT)
Ciampa, F. (PI)
Engineering and Physical Sciences Research Council
1/05/16 → 31/10/17
Project: Research council
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EXTREME - EXTREME Dynamic Loading - Pushing the Boundaries of Aerospace Composite Material Structures
Meo, M. (PI) & Ciampa, F. (CoI)
1/09/15 → 31/08/19
Project: EU Commission