Fotouhi, M. , Suwarta, P., Tabatabaeian, A., Fotouhi, S. , Jenkin, R., Jalalvand, M. and Wisnom, M. R. (2022) Investigating the fatigue behaviour of quasi-isotropic pseudo-ductile thin-ply carbon/glass epoxy hybrid composites. Composites Part A: Applied Science and Manufacturing, 163, 107206. (doi: 10.1016/j.compositesa.2022.107206)
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Abstract
This paper investigates the fatigue behaviour of pseudo-ductile Quasi-Isotropic (QI) interlayer hybrids with un-notched and open-hole configurations. Two different types of QI pseudo-ductile hybrids were evaluated; HighC, with carbon to glass thickness ratio of 0.29, that is made of thin-ply M46JB-carbon/epoxy and thin-ply Xstrand-glass/epoxy prepregs, and LowC, with carbon to glass thickness ratio of 0.19, that is made of thin-ply T300-carbon/epoxy and standard-ply S-glass/epoxy prepregs. The hybrid configurations were loaded at 4 Hz in tension–tension fatigue without any initial damage and at different percentages of the pseudo-yield stress (σpy) at which damage initiates. It was observed that there is no stiffness reduction, after 100000 cycles, for a stress level of 80% and 50% of the σpy for the un-notched and open-hole laminates, respectively. By increasing the stress level to 90% and 70% of the σpy for the un-notched and open-hole laminates, respectively, there is a gradual stiffness reduction due to the appearance of matrix cracking and delamination in LowC, but no gradual reduction and no visible damage were observed for HighC. The final failure is more brittle and happens at a lower number of cycles for HighC compared with LowC. Different damage extents were observed for the investigated laminates before the final sudden failure due to variables such as the ply thickness, the cyclic energy release rate and the interfacial fracture toughness.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Fotouhi, Dr Sakineh and Fotouhi, Dr Mohammad and Tabatabaeian, Mr Ali |
| Authors: | Fotouhi, M., Suwarta, P., Tabatabaeian, A., Fotouhi, S., Jenkin, R., Jalalvand, M., and Wisnom, M. R. |
| College/School: | College of Science and Engineering > School of Engineering College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Composites Part A: Applied Science and Manufacturing |
| Publisher: | Elsevier |
| ISSN: | 1359-835X |
| ISSN (Online): | 1878-5840 |
| Published Online: | 16 September 2022 |
| Copyright Holders: | Copyright © 2022 The Authors |
| First Published: | First published in Composites Part A: Applied Science and Manufacturing 163: 107206 |
| Publisher Policy: | Reproduced under a Creative Commons License |
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