Environmental effects on mode II fatigue delamination growth in an aerospace grade carbon/epoxy composite

An investigation of the effects of water, hydraulic fluid and deicing fluid exposure on mode II delamination propagation in an aerospace grade composite is presented. All exposed specimens suffered a loss in delamination toughness and an increase in fatigue delamination growth rate, which was partic...

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Bibliographic Details
Published in:Composites. Part A, Applied science and manufacturing Applied science and manufacturing, 2012-03, Vol.43 (3), p.475-485
Main Authors: Landry, Benoit, LaPlante, Gabriel, LeBlanc, Luc R.
Format: Article
Language:English
Subjects:
Applied sciences
B. Delamination
B. Environmental degradation
C. Finite element analysis (FEA)
carbon
Composites
D. Mechanical testing
delamination
epoxides
Exact sciences and technology
Forms of application and semi-finished materials
Laminates
Polymer industry, paints, wood
Technology of polymers
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Summary:An investigation of the effects of water, hydraulic fluid and deicing fluid exposure on mode II delamination propagation in an aerospace grade composite is presented. All exposed specimens suffered a loss in delamination toughness and an increase in fatigue delamination growth rate, which was particularly significant for deicing fluid exposure. The number of cycles for delamination onset was also reduced by these exposures, although scanning electron micrographs showed no significant differences between the fracture pattern of dry and exposed specimens. It was also shown that environmental effects can be simply accounted for in a cohesive zone based finite element model.
ISSN:1359-835X
1878-5840
DOI:10.1016/j.compositesa.2011.11.015