The influence of hardener-to-epoxy ratio on the interfacial strength in glass fibre reinforced epoxy composites

Minty, Ross F. and Yang, Liu and Thomason, James L. (2018) The influence of hardener-to-epoxy ratio on the interfacial strength in glass fibre reinforced epoxy composites. Composites Part A: Applied Science and Manufacturing. ISSN 1359-835X

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    Abstract

    This work seeks to develop a better understanding of the influence that the chemistry of an epoxy thermoset system has on the stress-transfer capability of the fibre-matrix interface. We discuss the correlation between the interfacial shear strength (IFSS) and the properties of the matrix such as glass transition temperature (Tg), storage modulus and linear coefficient of thermal expansion (LCTE). The results indicate that each is strongly dependent on the hardener-to-epoxy ratio and it was found that changes in IFSS can be related to changes in the thermomechanical properties of the matrix. From the results presented it is hypothesized that residual radial compressive stresses at the interface are influenced by the chemistry of the matrix system due to the changes in the properties of the matrix. The combination of these residual stresses with static friction may lead to a potential variation of the interfacial stress-transfer capability in glass-fibre reinforced epoxy composites.

    Author(s):Minty, Ross F. ORCID logoORCID: https://orcid.org/0000-0002-3729-5215, Yang, Liu ORCID logoORCID: https://orcid.org/0000-0001-8475-1757 and Thomason, James L. ORCID logoORCID: https://orcid.org/0000-0003-0868-3793
    Item type:Article
    ID code:64216
    Keywords:internal stress, interface, interphase, fibre/matrix bond, residual Stress, Chemical engineering, Mechanical engineering and machinery, Ceramics and Composites, Polymers and Plastics, Mechanics of Materials
    Subjects:Technology > Chemical engineering
    Technology > Mechanical engineering and machinery
    Department:Faculty of Engineering > Mechanical and Aerospace Engineering
    Depositing user: Pure Administrator
    Date deposited:04 Jun 2018 09:48
    Last modified:10 Jan 2020 17:12
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/64216
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