Results 61 to 70 of about 11,411 (229)

Investigating the influence of the constituent materials on the performance of periodic piezoelectric composite arrays [PDF]

open access: yes, 2007
This paper describes a theoretical investigation into the influence of the constituent materials on periodic composite array transducer performance. A finite element (FE) model, configured in PZFlex, is used to analyze the performance of a wedge coupled ...
Gachagan, A.   +3 more
core   +1 more source

Micro-Sized Pinhole Inspection with Segmented Time Reversal and High-Order Modes Cluster Lamb Waves Based on EMATs

open access: yesChinese Journal of Mechanical Engineering, 2023
Pinhole corrosion is difficult to discover through conventional ultrasonic guided waves inspection, particularly for micro-sized pinholes less than 1 mm in diameter.
Jinjie Zhou   +5 more
doaj   +1 more source

Non-Destructive Inspection of Impact Damage in Composite Aircraft Panels by Ultrasonic Guided Waves and Statistical Processing. [PDF]

open access: yes, 2017
This paper discusses a non-destructive evaluation (NDE) technique for the detection of damage in composite aircraft structures following high energy wide area blunt impact (HEWABI) from ground service equipment (GSE), such as heavy cargo loaders and ...
Capriotti, Margherita   +3 more
core   +2 more sources

Magnetoactive Metamaterials: A State‐of‐the‐Art Review

open access: yesAdvanced Engineering Materials, Volume 27, Issue 23, December 2025.
Magnetoactive metamaterials combine magnetoactive composites with architected metastructures to enable contactless, tunable control of mechanical, acoustic, and elastic properties. This review highlights recent advances in their design, fabrication, and applications in soft robotics, biomedical devices, and adaptive structures and outlines future ...
Seyyedmohammad Aghamiri, Ramin Sedaghati
wiley   +1 more source

Numerical solution of Rayleigh-Lamb frequency equation for real, imaginary and complex wavenumbers

open access: yesMATEC Web of Conferences, 2018
Guided waves, especially Lamb waves or shear-horizontal waves, are widely used types of waves for ultrasonic inspection of large structures. Well known property of guided waves is their dispersive character, which means that the propagation velocity of ...
Šofer Michal   +2 more
doaj   +1 more source

Detection of high-order Lamb waves using an end-face injection of ultrasonic pulses

open access: yesResults in Physics, 2019
In this work, we report the time-of-flight detection of high-order Lamb waves by using an end-face injection of ultrasonic pulses in plates. We used two piezoelectric transducers attached to the opposite edges of a rectangular plate. We applied the Short
Jesus Manzanares-Martinez   +3 more
doaj   +1 more source

Shear Wave Optical Coherence Elastography and Structural Analysis of the Postnatal Mouse Cornea through Development

open access: yesJournal of Biophotonics, Volume 18, Issue 12, December 2025.
This paper investigates the geometrical and biomechanical properties of neonatal eyes at the early stages of development. We found that the corneal thickness is uncoupled from elastic wave speed and that the content and organization of the cornea primarily influence its mechanical properties.
Andrew L. Lopez III   +4 more
wiley   +1 more source

Mode Separation for Multimodal Ultrasonic Lamb Waves Using Dispersion Compensation and Independent Component Analysis of Forth-Order Cumulant

open access: yesApplied Sciences, 2019
Ultrasonic Lamb wave testing has been successfully applied in nondestructive testing. However, because of Lamb wave multimodal and dispersion characteristics, the received signals are often multimodal and overlapping, which makes them very complicated ...
Xiao Chen, Dandan Ma
doaj   +1 more source

PCA based stress monitoring of cylindrical specimens using PZTs and guidedwaves [PDF]

open access: yes, 2017
Since mechanical stress in structures affects issues such as strength, expected operational life and dimensional stability, a continuous stress monitoring scheme is necessary for a complete integrity assessment. Consequently, this paper proposes a stress
Camacho Navarro, Jhonatan   +4 more
core   +3 more sources

Image‐Based Flaw Identification Using Convolutional Neural Network

open access: yesInternational Journal of Mechanical System Dynamics, Volume 5, Issue 4, Page 694-706, December 2025.
ABSTRACT Flaw detection in structures is crucial for ensuring structural integrity and safety across various engineering applications. Traditional nondestructive evaluation (NDE) techniques often face challenges in accurately identifying and characterizing flaws, particularly when dealing with complex geometries and strain fields.
Pugazhenthi Thananjayan   +2 more
wiley   +1 more source

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