Journal ArticleDOI
Delamination detection in composite laminates from variations of their modal characteristics
S.H. Diaz Valdes,Costas Soutis +1 more
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TLDR
In this article, a piezoceramic patch driven with a linear rapid frequency sweep was used to induce vibrations on the structure and its response registered via piezoelectric film sensors.About:
This article is published in Journal of Sound and Vibration.The article was published on 1999-11-18. It has received 116 citations till now. The article focuses on the topics: Modal testing & Delamination.read more
Citations
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Journal ArticleDOI
Structural health monitoring techniques for aircraft composite structures
K. Diamanti,Constantinos Soutis +1 more
TL;DR: A review of currently used inspection methods is presented and some examples are described where Lamb wave based scanning techniques have been used to identify internal damage in multi-layered composite structures in this article.
Journal ArticleDOI
Damage detection in composite materials using frequency response methods
TL;DR: In this paper, the authors present an experimental and analytical survey of candidate methods for the in situ detection of damage in composite materials, including modal analysis techniques applied to graphite/epoxy specimens containing representative damage modes.
Journal ArticleDOI
Vibration of Delaminated Composite Laminates: A Review
Christian N. Della,Dongwei Shu +1 more
TL;DR: In this article, a survey on various analytical models and numerical analyses for free vibration analysis of delaminated composites is presented, and a basic understanding of the influence of the delamination on the natural frequencies and the mode shapes of composite laminates is presented.
Dissertation
Piezoelectric-based in-situ damage detection of composite materials for structural health monitoring systems
TL;DR: Spearing et al. as discussed by the authors presented the conclusions of an analytical and experimental survey of candidate methods for in-situ damage detection in composite materials and verified experimentally by using piezoelectric patches as actuators and sensors.
Journal ArticleDOI
Online detection of crack damage in composite plates using embedded piezoelectric actuators/sensors and wavelet analysis
TL;DR: In this paper, the authors proposed a method for online detection of initial damage in composite structures based on energy variation of structural dynamic responses decomposed using wavelet analysis, which can detect extremely small cracks in composite plates.
References
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ReportDOI
Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review
TL;DR: A review of the technical literature concerning the detection, location, and characterization of structural damage via techniques that examine changes in measured structural vibration response is presented in this article, where the authors categorize the methods according to required measured data and analysis technique.
Journal ArticleDOI
A Vibration Technique for Non-Destructively Assessing the Integrity of Structures:
TL;DR: In this paper, a method of non-destructively evaluating the integrity of structures is described and applied to structures for which a one dimensional analysis is satisfactory, and it is shown how vibration measureme...
Journal ArticleDOI
Resonant ultrasound spectroscopic techniques for measurement of the elastic moduli of solids
Albert Migliori,J. L. Sarrao,William M. Visscher,T. M. Bell,Ming Lei,Zachary Fisk,Robert G. Leisure +6 more
TL;DR: In this article, the authors describe instrumentation and computational methods for acquiring and analyzing the resonant ultrasound spectrum of very small (0.001 cm3) samples as a function of temperature, and provide examples to demonstrate the power of the technique.
Journal ArticleDOI
Flexural vibrations of beams with delaminations
P M Mujumdar,S. Suryanarayan +1 more
TL;DR: In this paper, the effect of delamination on the natural vibration characteristics of laminated beam type structures is studied and an analytical model is presented for beams with through-width delaminations parallel to the beam surface located arbitrarily in both the spanwise and thicknesswise directions.
Journal ArticleDOI
Free vibrations of delaminated beams
M.-H. H. Shen,J. E. Grady +1 more
TL;DR: In this article, a generalized variational principle is used to formulate the equation of motion, taking into account the interlaminar stress concentration at the crack-tips, which is accomplished by introducing a "crack function" into the beam's compatibility relations.