2. Beading phenomenon
During the dimensioning phase, and more specifically when determining tube wall thicknesses, the designer uses an appropriate construction code. The latter refers to standards that indicate how to determine the mechanical characteristics of materials. In the case of homogeneous materials, i.e. metals or thermoplastic polymers, these characteristics are modulus of elasticity, stress at plasticity threshold or stress at rupture. They are determined in static tensile tests on standard specimens. They can also be deduced from tests on tubes subjected to internal pressure. In the case of these materials, tube rupture is manifested by bursting, resulting in the total loss of mechanical and sealing properties. The burst pressure is related to the stress at rupture of the material by the following equation
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Beading phenomenon
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References
Also in our database
Standards and norms
French Standards Association
- Systèmes de canalisations en plastiques. Tubes en plastiques thermodurcissables renforcés de verre (PRV). Détermination de la résistance à long terme à la pression interne - NF EN 1447 - 1996
- Systèmes de canalisations en plastiques. Tubes et raccords en plastique thermodurcissable renforcé de verre (PRV). Méthode d'essai pour établir l'étanchéité de la paroi sous une pression...
Events
Journées Nationales sur les Composites (France. Every two years) – AMAC (Association pour les matériaux composites) http://www.jnc/5.cnrs-mrs.fr/presentation.htm
Directory
Manufacturers – Suppliers – Distributors (non-exhaustive list)
Main specialist manufacturers
Ameron Fiberglass Pipe Group http://www.ameronfpd.com
Fiberdur France SA http://www.fiberdur.com
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