Scanning Electron Microscopy of the Effects of Moisture and Elevated Temperature on the Fibre/Matrix Bond in CFRP
Abstract
The engineering properties of carbon fibre reinforced plastics (CFRPs) make them attractive materials with potential applications in many demanding markets. Because of their low density, CFRPs have high specific strength and stiffness thus offering substantial savings in weight. For these reasons, composites such as carbon fibre reinforced epoxy resins are increasingly being used in aircraft primary and secondary structures. Unlike metals however, epoxy resins are moisture-sensitive and absorbed moisture can affect the properties of the composite as a whole. Today's military aircraft can also experience rapid high temperature excursions called 'thermal spikes' caused by air friction during supersonic flight or ground-reflected efflux from the engines of VTOL aircraft. Recent work suggests that not only is the resin matrix degraded by absorbed moisture, but also that the fibre/resin bond is itself degraded. This Memorandum describes an investigation using scanning electron microscopy (SEM) techniques to examine the fibre/resin interface for signs of degradation due to prolonged exposure to high humidity and thermal spiking.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1991
- Accession Number
- ADA243248
Entities
People
- G. D. Howard
Organizations
- Royal Aircraft Establishment