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Original Article

On the evaluation of failure strain in graphite-epoxy composites

J. C. MarínGrupo de Elasticidad y Resistencia de Materiales, Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Sevilla, SpainView further author information
&
J. JustoGrupo de Elasticidad y Resistencia de Materiales, Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Sevilla, SpainCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0003-1396-8056View further author information
ORCID Icon
Received 16 Dec 2022, Accepted 03 Aug 2023, Published online: 11 Aug 2023
 
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Abstract

Determination of failure strains is a topic of great interest for the design of composite structures. To evaluate the ultimate strains of a composite, tensile tests have been carried out on specimens with a range of fiber orientations between 0° and 90°. Ultimate tensile strengths obtained present low or moderate dispersion, the average values constituting a good estimation of the failure stress. Values of failure strains obtained present high dispersion for almost all orientations, so it is proposed to take as failure strain threshold the minimum value for each orientation. Finally, the shear behavior of the material has been evaluated.

Additional information

Funding

This work was supported by Junta de Andalucía and European Regional Development Fund under Grant P18-FR-3855.

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