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Acoustic emission-based methodology to evaluate delamination crack growth under quasi-static and fatigue loading conditions

Saeedifar, M ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1007/s10921-017-0454-0
  3. Publisher: Springer New York LLC , 2018
  4. Abstract:
  5. 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. © 2017, The Author(s)
  6. Keywords:
  7. Acoustic emission ; Delamination ; Fatigue ; Fatigue crack growth ; Acoustic emissions ; Cantilever beams ; Concrete beams and girders ; Cracks ; Data visualization ; Delamination ; Failure (mechanical) ; Fatigue crack propagation ; Fatigue of materials ; Laminated composites ; Strain energy ; Acoustic emission techniques ; Delamination crack ; Double cantilever beam ; Fatigue loadings ; Glass/epoxy composite ; Polynomial correlations ; Quasi-static ; Released strain ; Acoustic emission testing
  8. Source: Journal of Nondestructive Evaluation ; Volume 37, Issue 1 , March , 2018 ; 01959298 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s10921-017-0454-0