Understanding the mechanical response of glass and carbon fibres: stress-strain analysis and modulus determination

Rajnish Kumar*, Lars P. Mikkelsen, Hans Lilholt, Bo Madsen

*Corresponding author for this work

Research output: Contribution to journalConference articleResearchpeer-review

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Abstract

Accurate characterization of fibres is crucial for the understanding the properties and behaviour of fibre-reinforced composite materials. Fibre properties are key parameters for composite design, modelling and analysis. In this study, characterization of mechanical properties of glass and carbon fibres has been performed using a semi-automated single-fibre testing machine. Based on a sample set of 150 glass and carbon fibers fibres, engineering and true stress-strain curves are analyzed. Different modulus determination methods are discussed based on true stress-strain and tangent modulus-strain relationships. For glass fibres, the true stress-strain based tangent modulus is found to be independent of applied strain, whereas for carbon fibres, a tendency of tangent modulus to increase with applied strain is observed. The modulus of glass fibres is found to be independent of fibre diameter, whereas carbon fibres with smaller diameter show higher modulus compared with carbon fibres with larger diameters.
Original languageEnglish
Article number012033
JournalIOP Conference Series: Materials Science and Engineering
Volume942
Issue number1
Number of pages11
ISSN1757-8981
DOIs
Publication statusPublished - 2020
Event41st Risø International Symposium on Materials Science - Online event, Denmark
Duration: 7 Sep 202010 Sep 2020

Conference

Conference41st Risø International Symposium on Materials Science
CountryDenmark
CityOnline event
Period07/09/202010/09/2020

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