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6. Durability
An essential point to consider when designing composite enclosures is their durability. Several factors can reduce the service life of these structures, for example:
creep (static fatigue) ;
dynamic (i.e. cyclic) fatigue ;
SHOCK;
aging.
Creep (or static fatigue) is the viscoelastic deformation of a polymer under constant load. Numerous studies have been carried out on the behavior of composite tubes under internal pressure [1] [40] [41], but few data are available under external pressure. It is rare to be able to use hyperbaric chambers for long enough to carry out creep tests. However, under hydrostatic pressure, the dimensions of an enclosure will change, and this creep can lead to early buckling. Figure...
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Durability
Conclusion
Bibliography
Software tools
ABAQUS http://www.3ds.com/products-services/simulia/portfolio/abaqus/overview/
ADINA http://www.adina.com/index.shtml/
ANSYS http://www.ansys.com/
COMSOL http://www.comsol.com/
Websites
Ifremer, French Research Institute for Exploitation of the Sea http://www.ifremer.fr/
MaHyTec, manufacturer of composite cylinders http://www.mahytec.com
Events
Journées Nationales de Composites (JNC), a conference organized in France by AMAC (Association des Matériaux Composites) every two years, http://www.amac-composites.org/manifestations/journees-nationales-composites
JEC Europe, an annual trade show, forum and user conference organized...
Standards and norms
AFNOR NF X 10-812 Marine Environment, Oceanographic Equipment, Environmental Test and Recommendations for Test Equipment.
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