Acoustic Emission-Based Methodology to Evaluate Delamination Crack Growth Under Quasi-static and Fatigue Loading Conditions |
| |
| Authors: | Milad Saeedifar Mehdi Ahmadi Najafabadi Kaivan Mohammadi Mohamad Fotouhi Hossein Hosseini Toudeshky Reza Mohammadi |
| |
| Affiliation: | 1.Non-destructive Testing Lab, Department of Mechanical Engineering,Amirkabir University of Technology,Tehran,Iran;2.Structural Integrity & Composites Group, Faculty of Aerospace Engineering,Delft University of Technology,Delft,The Netherlands;3.Department of Mechanical Engineering,Sharif University of Technology,Tehran,Iran;4.Department of Design and Mathematics,University of the West of England,Bristol,UK;5.Department of Aerospace Engineering,Amirkabir University of Technology,Tehran,Iran |
| |
| Abstract: | 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. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
