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Fatigue crack growth in epoxy polymer nanocomposites
File(s)
Author(s)
Kinloch, Anthony
Jones, Rhys
Michopoulos, John
Type
Journal Article
Abstract
The present paper has described detailed analyses of experimental data for the cyclic-fatigue behaviour of epoxy nanocomposite polymers. It has been shown that the data may be interpreted using the Hartman-Schijve relationship to yield a unique, ‘master’, linear relationship for each epoxy nanocomposite polymer. By fitting the experimental data to the Hartman-Schijve relationship, two key materials parameters may be deduced: (a) the term A, which may be thought of as the fatigue equivalent to the quasi-static value of the fracture energy, ܩ௖, and (b) the fatigue threshold value, ∆ඥܩ௧௛௥, below which no significant fatigue crack growth (FCG) occurs. It has then been established that the values of these parameters, together with the slope, ݊, and intercept, ܦ, of the Hartman-Schijve master relationship, may be used (a) to compute the experimental results measured for the fatigue behaviour of the epoxy nanocomposite polymers, (b) to understand the observed fracture and fatigue behaviour of these materials with respect to the structure of the epoxy nanocomposite polymers and (c) to deduce the ‘upper-bound’, i.e. ‘worst-case’, FCG rate curve which may be used by industry as a material development, material selection, design and service-life prediction tool when these epoxy nanocomposite polymers are used in engineering applications such as structural adhesives and/or as matrices in fibre-reinforced composites.
Date Issued
2021-06-21
Date Acceptance
2021-03-01
Citation
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2021, 379 (2203), pp.1-19
URI
URL
DOI
ISSN
1364-503X
Publisher
The Royal Society
Start Page
1
End Page
19
Journal / Book Title
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume
379
Issue
2203
Copyright Statement
© 2021 The Author(s) Published by the Royal Society. All rights reserved.
Identifier
https://royalsocietypublishing.org/doi/10.1098/rsta.2020.0436
Subjects
adhesives
fatigue crack growth
fracture
polymer nanocomposites
General Science & Technology
Publication Status
Published
Date Publish Online
2021-06-21