Device for connecting the ends of a composite tube subjected to severe axial stress with metallic collars and manufacturing process therefor

A joint for connecting an end of a tube of composite material which is subject to relatively large axial stress to an annular ferrule, comprising:

• a composite tube composed of high strength fibers agglomerated by a polymerized synthetic resin having a wall;
• an annular metallic ferrule formed as a band, having in the entire cross-section the shape of a segment of a circle including a curved portion and a flat portion, said curved portion of said ferrule facing said composite tube, said annular metallic ferrule being embedded in a receiving surface of said wall of said tube;
• an end member having an extending portion which engages said annular metallic ferrule;
• wherein connection between said band and said end member is realized by a thread provided on the entire surface of said flat portion of said band, said thread being in threaded engagement with said extending portion of said end member.

A joint for connecting an end of a tube of composite material which is subject to relatively large axial stress to an annular metallic ferrule, comprising:

• a composite tube composed of high strength fibers agglomerated by a polymerized synthetic resin having a wall;
• an annular metallic ferrule formed as a band, having in cross-section the shape of a segment of a circle including a curved portion and a flat portion, said curved portion of said ferrule facing said composite tube, said annular metallic ferrule being embedded in a receiving surface of said wall of said tube;
• an end member having an extending portion which engages said annular metallic ferrule;
• and
• said extending portion terminates in a flange, and a ring is connected to said ferrule, wherein connection between said band and said end member is realized by a bolted connection between said ring and said flange end member.