Impact response and damage tolerance of hybrid glass/kevlar-fibre epoxy structural composites Show others and affiliations
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-86839 DOI: 10.3390/polym13162591 ISI: 000689908300001 PubMedID: 34451131 Scopus ID: 2-s2.0-85112290934 OAI: oai:DiVA.org:ltu-86839 DiVA, id: diva2:1587976
Note Validerad;2021;Nivå 2;2021-09-01 (johcin)
2021-08-262021-08-262024-01-17 Bibliographically approved