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Acoustic emission based investigation on the effect of temperature and hybridization on drop weight impact and post-impact residual strength of hemp and basalt fibres reinforced polymer composite laminates

Suresh Kumar, C.; Fotouhi, Mohamad; Saeedifar, Milad; Arumugam, V.

Authors

C. Suresh Kumar

Milad Saeedifar

V. Arumugam



Abstract

© 2019 Elsevier Ltd This paper investigates the effect of temperature and hybridization on the impact damage evolution and post-impact residual strength of hemp/epoxy, basalt/epoxy and their hybrid laminates, using mechanical and acoustic emission (AE) based analysis. To start with, the specimens were impacted by a drop weight impact tower machine at two temperatures of 30 °C and 65 °C and then they were subjected to a three-point bending test for the assessment of their residual strength, while online AE signals were recorded during the test. The mechanical behavior of the laminates was evaluated through measurement of the impact force and absorbed energy. AE response of the slope of cumulative rise angle (RA) was used for identification of the severity of the impact-induced damage in the laminates. In addition, the sentry function was computed on the basis of the correlation between the mechanical strain energy stored in the materials and the acoustic energy propagates by fracture events, enabled evaluation of the amount of impact-induced damage. These results showed the hybridized laminates having a better resistance to impact damage at the elevated temperature (65 °C) compared with the non-hybridized laminates, whereas, in the case of the ambient temperature (30 °C), basalt/epoxy laminates had a higher impact damage resistance than other configurations. This study reveals the capability of the proposed AE-based methods to investigate the effect of temperature and hybridization of composite laminates.

Citation

Suresh Kumar, C., Fotouhi, M., Saeedifar, M., & Arumugam, V. (2019). Acoustic emission based investigation on the effect of temperature and hybridization on drop weight impact and post-impact residual strength of hemp and basalt fibres reinforced polymer composite laminates. Composites Part B: Engineering, 173, https://doi.org/10.1016/j.compositesb.2019.106962

Journal Article Type Article
Acceptance Date May 27, 2019
Online Publication Date May 30, 2019
Publication Date Sep 15, 2019
Deposit Date Jun 3, 2019
Publicly Available Date May 31, 2020
Journal Composites Part B: Engineering
Print ISSN 1359-8368
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 173
Article Number 106962
DOI https://doi.org/10.1016/j.compositesb.2019.106962
Keywords hybrid composites, impact damage, elevated temperature, residual strength, acoustic emission, rise angle, sentry function
Public URL https://uwe-repository.worktribe.com/output/845699
Publisher URL http://doi.org/10.1016/j.compositesb.2019.106962
Additional Information Additional Information : This is the author's accepted manuscript. The final published version is available here: http://doi.org/10.1016/j.compositesb.2019.106962.

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