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2. Thermomechanical coupling
In the aerospace industry, composite laminates made of unidirectional plies of continuous fibers and polymer resin are widely used, thanks to their good specific mechanical properties and excellent fatigue resistance. However, the thermoelastic properties of fibers and matrix, on the one hand, and unidirectional plies, on the other, are very different and highly anisotropic. As a result, temperature variations induce, through prevented differential thermal expansion, intra- and inter-laminar stresses that can be significant. The first consequence of this thermomechanical coupling is the creation of thermally-induced residual stresses when the parts cool down from their consolidation temperature, residual stresses that manufacturers seek to minimize, in particular by optimizing manufacturing cycles. The higher the baking temperature, the greater these stresses will be, as is the case for...
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Thermomechanical coupling
Diffusion-mechanical coupling
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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