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Title: An atomic finite element model for biodegradable polymers. Part 2, A model for change in Young’s modulus due to polymer chain scission
Authors: Gleadall, Andrew
Pan, Jingzhe
Kruft, Marc-Anton
Issue Date: 2015
Publisher: © Elsevier
Citation: GLEADALL, A. ... et al., 2015. An atomic finite element model for biodegradable polymers. Part 2, A model for change in Young’s modulus due to polymer chain scission. Journal of the Mechanical Behavior of Biomedical Materials, 51, pp.237-247.
Abstract: Atomic simulations were undertaken to analyse the effect of polymer chain scission on amorphous poly(lactide) during degradation. Many experimental studies have analysed mechanical properties degradation but relatively few computation studies have been conducted. Such studies are valuable for supporting the design of bioresorbable medical devices. Hence in this paper, an Effective Cavity Theory for the degradation of Young's modulus was developed. Atomic simulations indicated that a volume of reduced-stiffness polymer may exist around chain scissions. In the Effective Cavity Theory, each chain scission is considered to instantiate an effective cavity. Finite Element Analysis simulations were conducted to model the effect of the cavities on Young's modulus. Since polymer crystallinity affects mechanical properties, the effect of increases in crystallinity during degradation on Young's modulus is also considered. To demonstrate the ability of the Effective Cavity Theory, it was fitted to several sets of experimental data for Young's modulus in the literature.
Sponsor: Andrew Gleadall acknowledges an EPSRC PhD studentship and a partial University studentship by the University of Leicester, United Kingdom.
Version: Accepted for publication
DOI: 10.1016/j.jmbbm.2015.07.010
URI: https://dspace.lboro.ac.uk/2134/26779
Publisher Link: https://doi.org/10.1016/j.jmbbm.2015.07.010
ISSN: 1751-6161
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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