Print Email Facebook Twitter 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 Title 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 Author Suresh Kumar, C. (Bharath Institute of Higher Education and Research) Fotouhi, Mohamad (University of the West of England) Saeedifar, M. (TU Delft Structural Integrity & Composites; Amirkabir University of Technology) Arumugam, V. (Madras Institute of Technology) Date 2019-09-15 Abstract 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. Subject Acoustic emissionElevated temperatureHybrid compositesImpact damageResidualRise angleSentry functionStrength To reference this document use: http://resolver.tudelft.nl/uuid:501e7146-e714-4af3-9150-2781cf5369f4 DOI https://doi.org/10.1016/j.compositesb.2019.106962 Embargo date 2020-06-01 ISSN 1359-8368 Source Composites Part B: Engineering, 173 Part of collection Institutional Repository Document type journal article Rights © 2019 C. Suresh Kumar, Mohamad Fotouhi, M. Saeedifar, V. Arumugam Files PDF EU_WEST_1_prod_s3_ucmdata ... 9570_3.pdf 3.77 MB Close viewer /islandora/object/uuid:501e7146-e714-4af3-9150-2781cf5369f4/datastream/OBJ/view