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Investigation of push-out delamination using cohesive zone modelling and acoustic emission technique

Saeedifar, Milad; Fotouhi, Mohamad; Ahmadi Najafabadi, Mehdi

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Authors

Milad Saeedifar

Mehdi Ahmadi Najafabadi



Abstract

© The Author(s) 2015. Push-out delamination is a serious concern in the drilling of fibre-reinforced composite materials. This damage occurs as the drill reaches the exit side of the material and can reduce the strength and stiffness of the structure. In this paper, a three-point bending test is performed on glass/epoxy-laminated composites to simulate the push-out delamination induced by thrust force during drilling. Cohesive zone modelling and acoustic emission monitoring are utilized to investigate the push-out delamination. Initially, double cantilever beam and end-notched flexure tests were performed to calibrate the cohesive zone modelling model. Following that, the actual loading condition is simulated using cohesive zone modelling-based finite element modelling. Energy of the acoustic emission signals is also used to detect the initiation of the delamination. The results obtained from cohesive zone modelling and acoustic emission showed that the applied methods can be used to understand and predict the initiation of push-out delamination and its progression. Finally, it is concluded that the proposed cohesive zone modelling and acoustic emission techniques can be used in the design stage as well as during the drilling process of laminated composite structures to avoid delamination.

Citation

Saeedifar, M., Fotouhi, M., & Ahmadi Najafabadi, M. (2016). Investigation of push-out delamination using cohesive zone modelling and acoustic emission technique. Journal of Composite Materials, 50(25), 3577-3588. https://doi.org/10.1177/0021998315622983

Journal Article Type Article
Acceptance Date Dec 18, 2015
Online Publication Date Dec 18, 2015
Publication Date Oct 1, 2016
Deposit Date Oct 16, 2017
Publicly Available Date Mar 28, 2024
Journal Journal of Composite Materials
Print ISSN 0021-9983
Electronic ISSN 1530-793X
Publisher SAGE Publications
Peer Reviewed Peer Reviewed
Volume 50
Issue 25
Pages 3577-3588
DOI https://doi.org/10.1177/0021998315622983
Keywords push-out delamination, acoustic emission, cohesive zone modelling, thrust force
Public URL https://uwe-repository.worktribe.com/output/907446
Publisher URL http://dx.doi.org/10.1177/0021998315622983

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