Artículo
Determination of in-plane and through-the-thickness coefficients of thermal expansion in composite angle brackets using digital image correlation
Autor/es | Graciani Díaz, Enrique
Justo Estebaranz, Jesús Zumaquero Bernal, Patricia Lucía |
Departamento | Universidad de Sevilla. Departamento de Mecánica de Medios Continuos y Teoría de Estructuras |
Fecha de publicación | 2020-04 |
Fecha de depósito | 2024-01-27 |
Publicado en |
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Resumen | A procedure for the simultaneous determination of in-plane and through-the-thickness coefficients of thermal
expansion (CTEs) in composite angle brackets is presented. Carbon fibre/epoxy samples are heated and digital
image ... A procedure for the simultaneous determination of in-plane and through-the-thickness coefficients of thermal expansion (CTEs) in composite angle brackets is presented. Carbon fibre/epoxy samples are heated and digital image correlation is used to determine the in-plane strains and out-of-plane displacements in one side of each sample. In-plane CTEs are obtained from the average in-plane strains measured at different temperatures. Through-the-thickness CTE is obtained from the angular distortion of the samples at different temperatures, which is determined from the out-of-plane displacements. One quasi-isotropic and two unidirectional samples are used. Unidirectional samples allow the material’s in-plane CTEs in orthotropic directions to be determined. Material’s in-plane CTEs permit predicting an in-plane CTE value for the quasi-isotropic sample that agrees with the experimental measurements. Conversely, results obtained for the through-the-thickness CTE in all samples show a significant dispersion. This fact is attributed to the manufacturing distortions present in the curved part of the samples. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) |
Identificador del proyecto | MAT2015-71309-P
MAT2016-80879-P UNSE15-CE3581 |
Cita | Graciani, E., Justo, J. y Zumaquero, P.L. (2020). Determination of in-plane and through-the-thickness coefficients of thermal expansion in composite angle brackets using digital image correlation. Composite Structures, 238, 111939. https://doi.org/10.1016/j.compstruct.2020.111939. |
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