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Impact response and damage tolerance of hybrid glass/kevlar-fibre epoxy structural composites
Department of Mechanical Engineering, Saveetha School of Engineering, SIMATS, Chennai 602105, India.
Department of Mechanical Engineering, Saveetha School of Engineering, SIMATS, Chennai 602105, India.
Department of Mechanical Engineering, Saveetha School of Engineering, SIMATS, Chennai 602105, India.
Department of Mechanical Engineering, ARM College of Engineering and Technology, Kanchipuram 603209, India.
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2021 (English)In: Polymers, E-ISSN 2073-4360, Vol. 13, no 16Article in journal (Refereed) Published
Abstract [en]

The present study is aimed at investigating the effect of hybridisation on Kevlar/E-Glass based epoxy composite laminate structures. Composites with 4 mm thickness and 16 layers of fibre (14 layers of E-glass centred and 2 outer layers of Kevlar) were fabricated using compression moulding technique. The fibre orientation of the Kevlar layers had 3 variations (0, 45 and 60°), whereas the E-glass fibre layers were maintained at 0° orientation. Tensile, flexural, impact (Charpy and Izod), interlaminar shear strength and ballistic impact tests were conducted. The ballistic test was performed using a gas gun with spherical hard body projectiles at the projectile velocity of 170 m/s. The pre-and post-impact velocities of the projectiles were measured using a high-speed camera. The energy absorbed by the composite laminates was further reported during the ballistic test, and a computerised tomographic scan was used to analyse the impact damage. The composites with 45° fibre orientation of Kevlar fibres showed better tensile strength, flexural strength, Charpy impact strength, and energy absorption. The energy absorbed by the composites with 45° fibre orientation was 58.68 J, which was 14% and 22% higher than the 0° and 60° oriented composites. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Place, publisher, year, edition, pages
MDPI, 2021. Vol. 13, no 16
Keywords [en]
Aramid fibers, Composite structures, Glass, High speed cameras, Impact strength, Laminated composites, Projectiles, Shear strength, Tensile strength, Ballistic impact tests, Composite laminate, Epoxy composite laminates, Fibre orientation, Inter-laminar shear strengths, Oriented composites, Projectile velocity, Structural composites, Charpy impact testing
National Category
Composite Science and Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-86839DOI: 10.3390/polym13162591ISI: 000689908300001PubMedID: 34451131Scopus ID: 2-s2.0-85112290934OAI: oai:DiVA.org:ltu-86839DiVA, id: diva2:1587976
Note

Validerad;2021;Nivå 2;2021-09-01 (johcin)

Available from: 2021-08-26 Created: 2021-08-26 Last updated: 2024-01-17Bibliographically approved

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Försth, MichaelSas, GabrielDas, Oisik

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