Book ChapterDOI
Ultrasonic Guided Waves for Hidden Damage Detection in Composite Structures: Theory and Experiments
Fabrizio Ricci,Ernesto Monaco,S. Tancredi,Leonardo Lecce,Sauvik Banerjee,Ajit Mal +5 more
- pp 577-584
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TLDR
To determine the location and the severity of a damage with a minimal operator intervention, the ultrasonic wave propagation data are analyzed using a damage index approach carefully designed to overcome the complexity and variability of the signals in the presence of damage as well as the geometric complexity of the structure.Citations
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Journal ArticleDOI
Influence of Dimensions and Shape of Process Cutouts on the Accuracy of Locating Acoustic Emission Sources
TL;DR: In this article, the effect of the size and shape of cutouts in steel plates on the difference in the arrival time of acoustic emission pulses at receiving transducers was compared with the results of a numerical simulation of the propagation of elastic waves in plates with various strip and circular cutouts.
References
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Journal ArticleDOI
On the accuracy of approximate plate theories for wave field calculations in composite laminates
Shyh-Shiuh Lih,Ajit Mal +1 more
TL;DR: In this article, the authors developed a multiple transform technique coupled with a numerical evaluation scheme to calculate the resulting double integral expressions for the displacements and stresses produced in a composite laminate subjected to dynamic loads.
Journal ArticleDOI
Finite Element and Plate Theory Modeling of Acoustic Emission Waveforms
TL;DR: In this paper, a comparison between two approaches to predict acoustic emission waveforms in thin plates was made using properties for both isotropic (aluminum) and anisotropic (unidirectional graphite/epoxy composite) materials.
Journal ArticleDOI
A wave propagation and vibration-based approach for damage identification in structural components
TL;DR: In this paper, a damage index (DI) approach for damage detection and localization based on high frequency wave propagation data and low frequency vibration measurements is presented, using the initial measurements performed on an undamaged structure as baseline, damage indices are evaluated from the comparison of the frequency response of the monitored structure with an unknown damage.
Journal Article
Wave theory of acoustic emission in composite laminates
TL;DR: In this paper, the relationship between the surface response and microfracture modes in composite laminates is studied to establish the theoretical background for waveform analysis of acoustic emission signals.
Journal ArticleDOI
Calculation of the Response of a Composite Plate to Localized Dynamic Surface Loads Using a New Wave Number Integral Method
TL;DR: In this paper, a semi-analytical method based on the finite element representation of the elastodynamic flow was proposed to analyze the wave generated by localized dynamic sources on the surface or interior of isotropicplates and anisotropic composite laminates.