Published Resources Details

Journal Article

Author
Hart-Smith, L. J.
Title
Is there really no need to be able to predict matrix failures in fi bre-polymer composite structures? Part 1: Explanation of fatal fl aws in existing theories
In
Australian Journal of Mechanical Engineering
Imprint
vol. 12, no. 2, June 2014, pp. 139-159
Url
http://dx.doi.org/10.7158/M12-AGM01.2014.12.2.
Description

2012 A G M Michell Medal

Abstract

A logic-based case is presented that it is necessary to be able to predict matrix failures in fibre-polymer composites, even though some 50 years after the introduction of the advanced fibre-polymer composites there is still no widely accepted theory capable of actually doing so. This lack is due to the widespread malpractice of artificially homogenising distinct fibre and matrix constituents into an "equivalent" anisotropic solid, to simplify the mathematics. The enormous residual thermal stresses in the matrix, even when the lamina is stress-free, are not widely recognised; these detract appreciably from the ability of the matrix to withstand applied mechanical loads. The extreme thermal mismatch between the fibres and the polymer causes the resin to try to shrink during cool-down after cure at high temperature, but the strong stiff fibres prevent this from happening. Such internal residual stresses cannot possibly exist in truly homogeneous materials, so the consequences are overlooked whenever homogenised material models are used in analyses when they should not have been. The case is made that it is impossible to predict matrix failures using any theory in which the fibre and resin constituents have been artificially homogenised, despite the myriad of theories claiming to do so that cannot.

EOAS ID: bib/ASBS13603.htm

Except where otherwise noted, content on this site is
Licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
What do we mean by this?

Published by the Centre for Transformative Innovation, Swinburne University of Technology.
This Edition: 2024 August (Larneuk - Gariwerd calendar - pre-spring - season of nesting birds)
Reference: http://www.bom.gov.au/iwk/gariwerd/larneuk.shtml
For earlier editions see the Internet Archive at: https://web.archive.org/web/*/www.eoas.info

The Encyclopedia of Australian Science and Innovation uses the Online Heritage Resource Manager (OHRM), a relational data curation and web publication system developed by the eScholarship Research Centre and its predecessors at the University of Melbourne 1999-2020. The OHRM has been maintained by Gavan McCarthy since 2020.

Cite this page: https://www.eoas.info/bib/ASBS13603.htm

"... the rengitj, as a visible mark or imprint on the land, is characterised as a place of origin, the repository of all names, as well as a kind of mapped visual expression of the connection between people and places which is to be carried out in the temporal sequence of the journey." Fanca Tamisari (1998) 'Body, Vision and Movement: In the footprints of the ancestors'. Oceania 68(4) p260