Composite tubular member having consistent strength and method

Details Composite tubular member having consistent strength and method Composite tubular member having consistent strength and method

B - Operations, Transporting

32

B

B32B 1/08 (2006.01) A63B 53/10 (2006.01) A63B 59/12 (2006.01) B29C 70/08 (2006.01) B32B 5/28 (2006.01)

Patent

CA 2227197

An axially extending tubular composite member (100) having a plurality of plies and extending along a longitudinal axis has at least three plies (116, 118, 120) with selectively structured fiber components in each ply. Typically an inner ply (116) has at least one biaxial fiber component, an intermediate ply (118) has at least an axial fiber component that typically is combined with two further fibers to form a triaxial fiber component. Another ply (120) typically has a woven fiber component. A further ply having a biaxial component either replaces the ply of woven fiber or is disposed beneath it over the intermediate ply. A surface veil (122) having fiber and an excess of resin material typically covers at least the innermost or outermost surface of the composite member. An internal web member (112, 114) can be provided, and typically also employs fibers and the matrix material.

La présente invention concerne un élément tubulaire allongé en composite (100), qui présente plusieurs couches, s'étend le long d'un axe longitudinal et possède au moins trois couches (116, 118, 120) avec, dans chacune d'elles, des composants fibreux auxquels une structure est donnée de façon sélective. Dans un cas typique, une couche intérieure (116) a au moins un composant fibreux biaxial, une couche intermédiaire (118) a au moins un composant fibreux axial qui, dans un cas typique, est combiné à deux autres fibres pour former un composant fibreux triaxial. Une autre couche (120) a, dans un cas typique, un composant fibreux tissé. Une autre couche ayant un composant biaxial remplace la couche de fibres tissées, ou bien elle est placée au-dessous d'elle, au-dessus de la couche intermédiaire. Un voile de surface (122) ayant des fibres et un excédent de résine couvre, dans un cas typique, au moins la surface la plus intérieure ou la plus extérieure de l'élément en composite. Il peut y avoir un élément intérieur (112, 114) fait d'une bande continue et, dans un cas typique, il comporte aussi des fibres et la matière du mélange-maître.

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