Open AccessUnderstanding the mechanical response of glass and carbon fibres: stress-strain analysis and modulus determination
Author(s) -
Rajnish Kumar,
Lars P. Mikkelsen,
Hans Lilholt,
Bo Madsen
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/942/1/012033
Subject(s) - materials science , composite material , tangent modulus , modulus , composite number , young's modulus , stress–strain curve , stress (linguistics) , strain (injury) , elastic modulus , dynamic modulus , tangent , characterization (materials science) , glass fiber , dynamic mechanical analysis , deformation (meteorology) , polymer , mathematics , geometry , nanotechnology , medicine , linguistics , philosophy
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.