Experimental evaluation of hygrothermal effects on pseudo-ductile thin ply angle-ply carbon/epoxy laminates

Jonathan D Fuller, Sam Mitchell, Thomas Pozegic, Xun Wu*, Marco L Longana, Michael R Wisnom

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

Thin ply angle-ply carbon fibre reinforced-polymer (CFRP) laminates can suppress damage until final failure under static and dynamic loading. Given the sensitivity of the polymer matrix to temperature and moisture, it is imperative to understand the influence of the environment on angle-ply CFRP composites. At −50 °C, specimens displayed more brittle behaviour compared to room temperature, whereas at a temperature of 80 °C specimens showed increased pseudo-ductility. Water bath conditioning at 60 °C until saturation had little effect on specimens tested at −50 °C. Wet specimens tested at room temperature showed lower failure stresses and higher failure strains compared to their dry counterparts. A combination of water bath immersion and testing at 80 °C induced extremely non-linear behaviour, with a reduction of the failure stresses and, in this case, also failure strain.
Original languageEnglish
Article number109388
JournalComposites Part B: Engineering
Volume227
Early online date9 Oct 2021
DOIs
Publication statusE-pub ahead of print - 9 Oct 2021

Bibliographical note

Funding Information:
This work was funded under the UK Engineering and Physical Sciences Research Council (EPSRC) Programme Grant EP/I02946X/1 on High Performance Ductile Composite Technology in collaboration with Imperial College, London. The work of Katie Smith in conducting the X-ray computed tomography is acknowledged and greatly appreciated as is the discussion with Prof. Ian Hamerton on polymer behaviour under different environmental conditions. All necessary data to support the conclusions are provided in the results section of the paper.

Publisher Copyright:
© 2021

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