Abstract
This work experimentally explores the post-impact behaviour of thin-ply angle-ply pseudo-ductile carbon fibre laminates subjected to tensile load. Indentation and low-speed impact tests were performed on standard tensile test specimens. Non-destructive tests were used to investigate the damage propagation. Digital Image Correlation (DIC) was adopted to detect the strain distribution during tensile tests. Post-damage pseudo-ductile behaviour was retained in angle-ply hybrid composites subjected to tensile loading conditions.
Highlights
Despite their excellent specific strength and stiffness, the industrial application of composite materials is still limited by their elastic-brittle behaviour
AI) test [19], this study focuses on Tension After Impact (TAI)
The full-field strains on the specimens’ surfa (CAI) test [19], this study focuses on Tension After Impact (TAI)
Summary
Despite their excellent specific strength and stiffness, the industrial application of composite materials is still limited by their elastic-brittle behaviour. A second mechanism to achieve pseudo-ductility was introduced by Fuller and Wisnom [7], who modelled the use of thin-ply angle-plies to generate additional strain through a ply re-orientation mechanism, i.e., the rotation of fibres towards the loading axis combined with shear in the matrix. This mechanism has been experimentally validated [8] using plies with a cured thickness of 0.03 mm laminated in a [±Θn]S lay-up (15◦ < Θ < 45◦ ). The two mechanisms mentioned above can be combined in a new material combination, i.e., thin-ply angle-plies, where a significant increment in pseudo-ductility can be achieved by angle re-orientation and fragmentation [8]
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