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The effect of matrix microcracks on the stress-strain relationship in fiber composite tubes

Lookup NU author(s): Emeritus Professor Terry Evans, Professor Geoff Gibson, Dr Simon Frost

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Abstract

A model for the stress-strain behavior of fiber composites with matrix cracks is presented and applied to the deformation of fiber reinforced composite pipes under different combinations of hoop and axial stress. The model provides a good description of the nonlinear stress-strain relationship that develops in composites when the matrix is damaged by the progressive nucleation of microcracks during loading. Ply properties are expressed as a function of crack density, calculated as a function of increasing stress using the shear-lag approximation. The predictions are in very good agreement with data from multiaxial tests on ±55° filament wound glass-reinforced epoxy pipes.

Publication metadata

Author(s): Roberts SJ, Evans JT, Gibson AG, Frost SR

Publication type: Article

Publication status: Published

Journal: Journal of Composite Materials

Year: 2003

Volume: 37

Issue: 17

Pages: 1509-1523

ISSN (print): 0021-9983

ISSN (electronic): 1530-793X

Publisher: Sage

URL: http://dx.doi.org/10.1177/0021998303034360

DOI: 10.1177/0021998303034360

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