Quantifying the delamination of L-shaped composite laminates under low velocity impact using x-ray computed tomography

Cinar, Kenan; Guven, Ibrahim; Fatih E., Oz; Ersoy, Nuri

Abstract

Low velocity impact response and failure behavior of L-shaped composite laminates were investigated. The composite laminates with variable thickness, stacking sequences, and corner radius were manufactured using autoclave manufacturing method. Tests were conducted on a custom low velocity impact test set-up. In order to investigate and quantify the internal damage of the samples, x-ray micro-computed tomography technique was used. The results showed that the deflection of cross-ply samples was higher than the unidirectional ones, and as the
thickness decreases deflection increases for the same loading conditions. In addition, as the corner radius decreased, the deflection was more pronounced. Delamination
migration was observed at the mid-plane of the corner in unidirectional samples while delamination planes largely remained separate and parallel to each other in the crossply
samples.

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 33rd Technical Conference of the American Society for Composites 2018
• Start Date: Sep 24, 2018
• End Date: Sep 27, 2018
• Acceptance Date: Sep 24, 2018
• Deposit Date: Jan 24, 2019
• Publicly Available Date: Jan 24, 2019
• Peer Reviewed: Not Peer Reviewed
• Pages: 561-576
• Keywords: delamination, composite laminates, low velocity impact
• Public URL: https://uwe-repository.worktribe.com/output/860308
• Publisher URL: http://dpi-proceedings.com/index.php/asc33/article/view/25949
• Additional Information: Additional Information : This article appeared in the Proceedings of the American Society for Composites: Thirty-third Technical Conference, 2018. Lancaster, PA: DEStech Publications, Inc.; Title of Conference or Conference Proceedings : 33rd Technical Conference of the American Society for Composites 2018
• Contract Date: Jan 24, 2019