Off-axis tensile performance of notched resin-infused thermoplastic 3D fibre-reinforced composites

Shah, S.Z.H. and Megat-Yusoff, P.S.M. and Sharif, T. and Hussain, S.Z. and Choudhry, R.S. (2022) Off-axis tensile performance of notched resin-infused thermoplastic 3D fibre-reinforced composites. Mechanics of Materials, 175. ISSN 01676636

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Abstract

This study presents a comparison of off-axis tensile performance for notched (open-hole) and unnotched (no-hole) 3D fibre reinforced composites (FRC) specimens having two different types of matrices. The two matrix systems compared are, a novel infusible thermoplastic (Elium) resin and conventional thermoset (epoxy). Three different configurations, (one unnotched and two notched) were tested for each 3D-FRC. The resulting notched net strength, gross strength, failure strains, notch sensitivity and energy absorbed by each configuration were evaluated and compared. Additionally, 2D digital image correlation (DIC) was used to evaluate full-field strain distribution in each case. The results elucidate that thermoplastic 3D-FRCs are notch insensitive irrespective of the notch size and possess higher failure strains (around 30 percent in the cases investigated) and energy absorption (around 33 percent in the cases investigated). In contrast, thermoset 3D-FRC appeared to be notch sensitive, as the notched size increased, and they failed at lower axial strains (up to 60 percent reduction compared to unnotched specimens for the size investigated). Thus, resin-infused thermoplastic off-axis configurations are effective for composite joint applications, particularly in notch-insensitive designs, requiring higher energy absorption and failure strains. © 2022 The Authors

Item Type: Article
Additional Information: cited By 2
Uncontrolled Keywords: Energy absorption; Epoxy resins; Fiber reinforced plastics; Resins; Strain; Strain measurement; Thermosets, 3-dimensional reinforcement; 3D fibers; Digital image correlations; Failure strain; Fibre-reinforced composite; Notched tension; Off-axis; Open holes; Tensile performance; Thermoplastic resin (elium), Image correlation
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 19 Dec 2023 03:22
Last Modified: 19 Dec 2023 03:22
URI: https://khub.utp.edu.my/scholars/id/eprint/16133

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