Abstract
Abstract : The applicability of the acoustic emission (AE) technique to detect and locate damage initiation, monitor its progression and accumulation and to identify the major modes of damage associated with the failure process in cross- ply AS4/3502 graphite/epoxy laminates has been investigated. Six pairs of different laminate configurations were studied, having different stacking sequences and containing different ratios of ply thickness. Each pair included one laminate with external 90 deg plies and one with external 0 deg plies, e.g. (902/02/90)s, and (02/902/0)s, respectively. The testing program included determination of mechanical properties and monitoring of failure mechanisms and processes using optical observations, X-radiography, deplying, and scanning electron microscopy. Special efforts were directed toward establishing a correlation between the failure process and the AE results. Acoustic emission was monitored during quasi-static loading to failure in all cross-ply laminates. Results indicate that stacking sequence strongly affects the events intensities, e. g. amplitude energy, duration, and counts per event. Also, stacking sequence has a significant effect on damage initiation load and on rate of damage accumulation. Composite Materials, Acoustic Emission, Acousto-Ultrasonics, Fatigue, Damage Mechanics, Damage Accumulation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
