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Fatigue behaviour of un-notched and open-hole quasi-isotropic pseudo-ductile thin-ply carbon/glass hybrid laminates

Fotouhi, Mohammad; Suwarta, Putu; Jenkin, Ross; Jalalvand, Meisam; Wisnom, Micheal

Authors

Putu Suwarta

Ross Jenkin

Meisam Jalalvand

Micheal Wisnom



Abstract

This paper investigates fatigue behaviour of a QI composite made from thin carbon plies and standard thickness glass plies. As illustrated in Fig. 2, this orientation-dispersed QI thin-ply carbon/glass hybrid laminate showed a successful pseudo-ductile un-notched behaviour with improved notch-insensitivity and suppression of free-edge delamination. In this study an experimental program has been carried out to investigate the damage development throughout the life of un-notched and open-hole thin-ply carbon/glass hybrid configurations consisting of thin ply T300 carbon/epoxy and S-glass/epoxy prepregs, before having any pseudo-ductile damage and at two different stress levels. The fatigued samples are illustrated in Figs. 3 and 4. The knee point is determined at the intersection of the lines fitted through the initial linear and the plateau parts of the individual stress-strain curves. It was observed that, for the un-notched samples, there is no stiffness reduction, after 100,000 cycles, for a stress level of 80% of the knee-point stress at which significant damage starts. By increasing the stress level to 90% of the knee point stress, there is a gradual stiffness reduction due to the appearance of matrix cracking and delamination.

Citation

Fotouhi, M., Suwarta, P., Jenkin, R., Jalalvand, M., & Wisnom, M. (2019, August). Fatigue behaviour of un-notched and open-hole quasi-isotropic pseudo-ductile thin-ply carbon/glass hybrid laminates. Presented at ICCM22

Presentation Conference Type Speech
Conference Name ICCM22
Start Date Aug 11, 2019
End Date Aug 16, 2019
Acceptance Date Mar 13, 2019
Peer Reviewed Not Peer Reviewed
Keywords fatigue, un-notched, open-hole, quasi-isotropic, pseudo-ductile, thin-ply, carbon/glass hybrid
Public URL https://uwe-repository.worktribe.com/output/850596
Additional Information Title of Conference or Conference Proceedings : ICCM22

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