Abstract: A pressure vessel includes front and rear end plates and a plurality of open-ended vessel structures constructed of fibre-reinforced polymer matrix composite material positioned adjacent to one another so that their longitudinal axes are parallel to a longitudinal direction extending between the front and rear end plates. The vessel also includes an outer reinforcement comprising polymer matrix composite material with continuous fibres extending longitudinally around the pressure vessel to secure the front and rear end plates to the vessel structures. At least one of the vessel structures has a partially curved cross section in a plane perpendicular to its longitudinal axis, such that one or more crevices are formed between the vessel structures, running longitudinally between the front and rear end plates and the front and rear end plates are shaped to allow the outer reinforcement to at least partially fill the one or more crevices between the vessel structures.

Abstract: A method of manufacturing a composite (e.g. fibre-reinforced polymer) connector for a fluid transfer conduit includes: manufacturing a continuous fibre pre-form net 150 that is shaped to comprise a hub-forming portion 156 and a flange-forming portion 158, the continuous fibre pre-form net comprising continuous fibre reinforcement 110 and a common support layer 151 to which the continuous fibre reinforcement 110 is secured by being stitched thereto; placing the continuous fibre pre-form net 150 into a mould, the mould being shaped such that the hub-forming portion 156 forms a tubular hub portion which extends along a central axis and the flange-forming portion 158 forms a flange portion which extends from the hub portion at an angle to the central axis; and introducing polymer into the mould so as to form a composite connector comprising the flange portion and the hub portion.

Abstract: A pressure vessel includes front and rear end plates and a plurality of open-ended vessel structures constructed of fibre-reinforced polymer matrix composite material positioned adjacent to one another so that their longitudinal axes are parallel to a longitudinal direction extending between the front and rear end plates. The vessel also includes an outer reinforcement comprising polymer matrix composite material with continuous fibres extending longitudinally around the pressure vessel to secure the front and rear end plates to the vessel structures. At least one of the vessel structures has a partially curved cross section in a plane perpendicular to its longitudinal axis, such that one or more crevices are formed between the vessel structures, running longitudinally between the front and rear end plates and the front and rear end plates are shaped to allow the outer reinforcement to at least partially fill the one or more crevices between the vessel structures.

Abstract: A composite shaft with an end fitting mounted on an interface region on at least one end of said shaft, and a preload structure arranged to provide a biasing force to bias the composite shaft against the end fitting; wherein the preload structure is in an interference fit with the composite shaft. The preload structure is applied to the composite shaft in a subsequent operation to the mounting of the end fitting to the shaft.