Results 171 to 180 of about 11,815 (201)

Monitoring of acoustic emission activity using thin wafer piezoelectric sensors

SPIE Proceedings, 2014
ABSTRACT Acoustic emission (AE) is a well-known technique for monitoring onset and propagation of material damage. The technique has demonstrated utility in assessment of metallic and composite materials in applications ranging from civil structures to aerospace vehicles.
Blaine Trujillo, Andrei N. Zagrai, Daniel Meisner, Sepand Momeni   +3 more
openaire   +1 more source

Piezoelectric Wafer Active Sensor Structural Health Monitoring of Space Structures

Journal of Intelligent Material Systems and Structures, 2010
Structural Health Monitoring (SHM) is a valuable tool for in-service assessment of structural condition. Despite a broad use in many engineering fields, SHM has seen limited application in space systems. This article explores specifics of SHM applied to space systems and satellites in particular.
Andrei Zagrai, Derek Doyle, Vlasi Gigineishvili, Jacob Brown, Hugh Gardenier, Brandon Arritt   +5 more
openaire   +1 more source

Structural Health Monitoring With Piezoelectric Wafer Active Sensors Exposed to Irradiation Effects

Volume 6: Materials and Fabrication, Parts A and B, 2012
The increasing number, size, and complexity of nuclear facilities deployed worldwide are increasing the need to maintain readiness and develop innovative sensing materials to monitor important to safety structures (ITS) such as pressure vessels and piping (PVP) in a nuclear reactor.
Lin, B., Gresil, M., Mendez-Torres, A.E., Giurgiutiu, V.   +3 more
openaire   +2 more sources

Embedded NDT with Piezoelectric Wafer Active Sensors

2011
Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive enablers for a large class of embedded NDT applications such as structural health monitoring (SHM). After a brief review of PWAS physical principles and basic modeling, the paper considers several ultrasonics SHM methods such as: (a) embedded guided-wave ultrasonics, i.e., pitch ...
openaire   +1 more source

Modeling and testing of PZT and PVDF piezoelectric wafer active sensors

Smart Materials and Structures, 2006
Piezoelectric wafer active sensors (PWAS) used in structural health monitoring (SHM) applications are able to detect structural damage using Lamb waves. PWAS are small, lightweight, unobtrusive and inexpensive. They achieve direct transduction between electric and elastic wave energies.
Lin, B, Giurgiutiu, V
openaire   +3 more sources

Predictive Modeling of Piezoelectric Wafer Active Sensors for Structural Health Monitoring

Ferroelectrics, 2014
Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive transducers made from ferroelectric piezoceramic wafers attached to safety-critical structure. PWAS transducers enable a large class of structural health monitoring (SHM) applications. The focus of this paper is on the predictive modeling of structurally-attached PWAS.
Lin, Bin, Gresil, Matthieu, Cuc, Adrian, Giurgiutiu, Victor   +3 more
openaire   +2 more sources

Disbond detection in adhesively bonded structures using piezoelectric wafer active sensors

SPIE Proceedings, 2004
Adhesively bonded joints between metallic and composite plates are gaining increasing acceptance in safety critical applications such as automotive and aerospace structures. Lamb wave methods have considerable potential for the inspection of adhesive joints and assemblies for two reasons: they do not require direct access to the bond region, and they ...
Adrian Cuc, Victor Giurgiutiu
openaire   +1 more source

Piezoelectric Wafer Active Sensors for Structural Health Monitoring of Composite Structures

51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference<BR> 18th AIAA/ASME/AHS Adaptive Structures Conference<BR> 12th, 2010
Piezoelectric wafer active sensors (PWAS) are lightweight and inexpensive enablers for a large class of structural health monitoring (SHM) applications such as: (a) embedded guided-wave ultrasonics, i.e., pitch-catch, pulse-echo, phased arrays; (b) high-frequency modal sensing, i.e., the electro-mechanical (E/M) impedance method; (c) passive detection (
Victor Giurgiutiu, Giola Santoni-Bottai
openaire   +1 more source

Guided wave propagation in composite laminates using piezoelectric wafer active sensors

The Aeronautical Journal, 2013
AbstractPiezoelectric wafer active sensors (PWAS) are lightweight and inexpensive transducers that enable a large class of structural health monitoring (SHM) applications such as: (a) embedded guided wave ultrasonics, i.e., pitch-catch, pulse-echo, phased arrays; (b) high-frequency modal sensing, i.e., electro-mechanical impedance method; and (c ...
Gresil, M, Giurgiutiu, Victor
openaire   +2 more sources

Thickness mode EMIS of constrained proof-mass piezoelectric wafer active sensors

Smart Materials and Structures, 2015
This paper addresses theoretical and experimental work on thickness-mode electromechanical (E/M) impedance spectroscopy (EMIS) of proof-mass piezoelectric wafer active sensors (PMPWAS). The proof-mass (PM) concept was used to develop a new method for tuning the ultrasonic wave modes and for relatively high frequency local modal sensing by the PM ...
Kamas, Tuncay, Giurgiutiu, Victor, Lin, Bin   +2 more
openaire   +2 more sources