Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions

The aim of this study was to investigate the applicability of acoustic emission (AE) technique to evaluate delamination crack in glass/epoxy composite laminates under quasi-static and fatigue loading. To this aim, double cantilever beam specimens were subjected to mode I quasi-static and fatigue loa...

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Bibliographic Details
Published inJournal of nondestructive evaluation Vol. 37; no. 1; pp. 1 - 13
Main Authors Saeedifar, Milad, Ahmadi Najafabadi, Mehdi, Mohammadi, Kaivan, Fotouhi, Mohamad, Hosseini Toudeshky, Hossein, Mohammadi, Reza
Format Journal Article
LanguageEnglish
Published New York Springer US 01.03.2018
Springer Nature B.V
Subjects
Acoustic emission testing
Acoustic fatigue
ACOUSTICS
AUGER ELECTRON SPECTROSCOPY
Cantilever beams
Characterization and Evaluation of Materials
Classical Mechanics
Control
Correlation analysis
CORRELATIONS
CRACK PROPAGATION
CRACKS
Delamination
Dynamical Systems
Embedded structures
EMISSION
Emission analysis
Energy consumption
ENGINEERING
FATIGUE
Fatigue failure
Laminates
POLYNOMIALS
Solid Mechanics
STRAINS
Vibration
Acoustic emission
Fatigue crack growth
Fatigue
Delamination
Quasi-static
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Summary:The aim of this study was to investigate the applicability of acoustic emission (AE) technique to evaluate delamination crack in glass/epoxy composite laminates under quasi-static and fatigue loading. To this aim, double cantilever beam specimens were subjected to mode I quasi-static and fatigue loading conditions and the generated AE signals were recorded during the tests. By analyzing the mechanical and AE results, an analytical correlation between the AE energy with the released strain energy and the crack growth was established. It was found that there is a 3rd degree polynomial correlation between the crack growth and the cumulative AE energy. Using this correlation the delamination crack growth was predicted under both the static and fatigue loading conditions. The predicted crack growth values was were in a good agreement with the visually recorded data during the tests. The results indicated that the proposed AE-based method has good applicability to evaluate the delamination crack growth under quasi-static and fatigue loading conditions, especially when the crack is embedded within the structure and could not be seen visually.
ISSN:0195-9298
1573-4862
DOI:10.1007/s10921-017-0454-0