Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 42, Issue 4, Pages 408-418Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2010.12.015
Keywords
Polymer-matrix composites (PMCs); Damage tolerance; Non-destructive testing
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Accelerated UV degradation conditions were imposed on different epoxy resin composites reinforced with carbon fibre, 3D parabeam glass, and E-glass. X-ray micro computed tomography (X mu CT) was used to evaluate the changes in the composites' inner structure as a result of the treatment. Structural damage factors such as density changes, reinforcement filler damage, homogeneity, cracks and microcracks were examined. X mu CT 3D images, 2D reconstructed slices and void calculations showed cracks in all composites with different shapes and volume in response to the UV degradation conditions. 3D-glass reinforced epoxy composites showed the least amount of damage in comparison with other composites. E-glass suffered the most damage upon UV degradation. Most of the structural damage in both 3D-glass and E-glass composites occurred in the resin matrix in the near-surface region, while internal damage was present in the form of delamination in the carbon fibre composite. (C) 2010 Elsevier Ltd. All rights reserved.
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