An integrated structural health monitoring approach for crack growth monitoring

A novel structural health monitoring approach consisting of guided ultrasonic waves, acoustic emission, and digital image correlation, as well as real-time and postmortem analyses, was implemented to monitor and quantify crack growth in Al 2024 compact tension specimens, designed, and precracked acc...

Full description

Saved in:
Bibliographic Details
Published in:Journal of intelligent material systems and structures 2012-09, Vol.23 (14), p.1563-1573
Main Authors: Vanniamparambil, Prashanth Abraham, Bartoli, Ivan, Hazeli, Kavan, Cuadra, Jefferson, Schwartz, Eric, Saralaya, Raghavendra, Kontsos, Antonios
Format: Article
Language:English
Subjects:
Acoustic emission
Acoustical measurements and instrumentation
Acoustics
Crack propagation
Detectors
Digital
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Health monitoring (engineering)
Measurement and testing methods
Physics
Real time
Solid mechanics
Structural and continuum mechanics
Transducers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel structural health monitoring approach consisting of guided ultrasonic waves, acoustic emission, and digital image correlation, as well as real-time and postmortem analyses, was implemented to monitor and quantify crack growth in Al 2024 compact tension specimens, designed, and precracked according to ASTM E647-08. Tensile loads were applied according to ASTM E1290-08. Guided ultrasonic waves were generated with pulses centered at three different frequencies and were recorded using piezoelectric transducers. Guided ultrasonic waves were also modeled using finite element wave propagation models. The same transducers were further used for online acoustic emission monitoring. A digital image correlation system continuously monitored the crack growth and provided full-field surface strains. The application of this integrated structural health monitoring approach resulted in reliable damage detection and quantified crack growth measurements. In addition, a novelty detector based on the Mahalanobis distance was implemented in a data fusion scheme to assess the extent of damage. The reported results constitute a proof-of-concept investigation of a novel structural health monitoring approach based on the combination of real-time optical and acoustic nondestructive testing.
ISSN:1045-389X
1530-8138
DOI:10.1177/1045389X12447987