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4. Thermo-chemical-mechanical coupling: thermo-oxidation
Thermo-oxidation mainly affects organic polymers which, when held at high temperatures (from around 120°C, depending on the type of resin), undergo irreversible structural changes associated with their instability and interaction with atmospheric oxygen. Oxidation reaction rates depend on polymer "availability", oxygen concentration and temperature. They may exceed the diffusion rate of oxygen in the polymer. In this case, the oxidation process is diffusion-controlled. For polymers whose oxidation process is diffusion-controlled, if there are enough oxidizable sites, the thickness of the oxidized layer will remain constant, so the diffusion-reaction system is stationary. Observations by optical microscopy show the formation of a fairly thin oxidized layer (of the order of hundreds of micrometers) located near the surface exposed to the environment: the aging process takes place mainly in...
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Thermo-chemical-mechanical coupling: thermo-oxidation
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Bibliography
Events
DURACOSYS – DURAbility of Composite SYStems – International conference series on the durability of composite materials and systems.
ICCM – International Conference on Composite Materials – International conference series on composite materials.
ECCM – European Conference on Composite Materials – International conference series on composite materials.
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Standards and norms
Durability standards for composite materials
- Federal aviation regulations – Part 25: material strength properties and design values - FAR 25.613 - 2003
- Federal aviation administration – Advisory circular – Composite aircraft structure - FAA AC 20-107A - 2009
- Federal aviation regulations – Part 25: Materials - FAR 25.603 - 1978
- Federal aviation regulations – Part 25: Fabrication methods...
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Federal Aviation Administration (FAA) – Government agency responsible for regulations and controls concerning civil aviation in the United States.
Joint Aviation Authorities (JAA) – Organization associated with the ECAC (European Civil Aviation Conference) in the harmonization of civil aviation in Europe. Since 2009, it has been...
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