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Off-axis fabric orientation angle effect on the flexural characterisation of mineral basalt-fibre-reinforced novel acrylic thermoplastic composites
Date
2025
Abstract
A fabric orientation angle has a significant influence on the failure mechanisms at the lamina level. Any change in this angle can lead to a sudden reduction in strength, potentially resulting in catastrophic failures due to variations in load-carrying capacity. This study examined the impact of off-axis fabric orientation angles (0◦, 15◦, 30◦, 45◦, 60◦, and 90◦) on the flexural properties of non-crimp basalt-fibre-reinforced acrylic thermoplastic composites.
The basalt/Elium® composite panels were manufactured using a vacuum-assisted resin transfer moulding technique. The results show that the on-axis (0◦) composite specimens exhibited linear stress–strain behaviour and quasi-brittle failure characterised by fibre dominance, achieving superior strength and failure strain values of 1128 MPa and 3.85%, respectively. In contrast, the off-axis specimens exhibited highly nonlinear ductile behaviour.
They failed at lower load values due to matrix dominance, with strength and failure strain values of 144 MPa and 6.0%, respectively, observed at a fabric orientation angle of 45◦ . The in-plane shear stress associated with off-axis angles influenced the flexural properties.
Additionally, the degree of deformation and the fracture mechanisms were analysed.
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Description
Publisher
MDPI
Citation
Journal of Compoisite Science, 9 (7), pp.347-
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Bandaru_2025_Off-Axis.pdf
Adobe PDF, 2.57 MB
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Funding Information
Sustainable Development Goals
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License
Attribution-NonCommercial-ShareAlike 4.0 International