metallic seal metallic nozzle bonding structural bond laminated tube laminated tube Figure 8.17 Composite-metal Shaft Bonding Reduction in mechanical vibrations Decrease in acoustic vibration level (in particular the "peak") Good resistance against chemical agents Very good fatigue resistance Lateral transmission shafts are used for vehicles with front drive.They are used to eliminate the homokinetic joints that are actually used.They are made of a weak matrix material and wound fibers that allow the freedom of flexure for the transmission shaft. 8.2 COMPOSITES IN NAVAL CONSTRUCTION 8.2.1 Competition 8.2.1.2 Multishell Sail Boats In the past years there has been a spectacular development in the sailboat competition,with significant research activities on the improvement of the qualities of the boats,and the design of sail boats called "multishells"with large dimen- sions,made of high performance composites,characterized by ■Low mass leading to reduced“water drafts" New and more performing"riggings"20 Resistance against intense fatigue loadings,namely for the joint mechanisms between the shells Example:Catamaran Elf Aquitaine (FRA)1983 (see Figure 8.18).This is a large boat (20 m)in high performance composite materials.It has the following principal characteristics: A mast-sail constituted of two half-shells in carbon/epoxy,24 meters long ■ Connecting arms for shells with "x"shape that work in flexure to take up the difference in pitching between the two shells There is a record speed of 34 knots with a class C catamaran 7.6 m in length). 2003 by CRC Press LLC
Reduction in mechanical vibrations
Decrease in acoustic vibration level (in particular the “peak”)
Good resistance against chemical agents
Very good fatigue resistance
Lateral transmission shafts are used for vehicles with front drive. They are used to eliminate the homokinetic joints that are actually used. They are made of a weak matrix material and wound fibers that allow the freedom of flexure for the transmission shaft. 8.2 COMPOSITES IN NAVAL CONSTRUCTION 8.2.1 Competition 8.2.1.2 Multishell Sail Boats In the past years there has been a spectacular development in the sailboat competition, with significant research activities on the improvement of the qualities of the boats, and the design of sail boats called “multishells” with large dimen￾sions, made of high performance composites, characterized by
Low mass leading to reduced “water drafts”
New and more performing “riggings” 10
Resistance against intense fatigue loadings, namely for the joint mechanisms between the shells Example: Catamaran Elf Aquitaine (FRA) 1983 (see Figure 8.18). This is a large boat (20 m) in high performance composite materials. It has the following principal characteristics:
A mast-sail constituted of two half-shells in carbon/epoxy, 24 meters long
Connecting arms for shells with “x” shape that work in flexure to take up the difference in pitching between the two shells Figure 8.17 Composite-metal Shaft Bonding 10 There is a record speed of 34 knots with a class C catamaran (7.6 m in length). TX846_Frame_C08 Page 193 Monday, November 18, 2002 12:22 PM © 2003 by CRC Press LLC