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	How do I join my structures?

When composite structures cannot be manufactured in one piece, joining methods can be utilised. There are several options for joining polymeric composite components with other composite components or with metal components to form complex structures. Bonded joining techniques and mechanical joining techniques are available. If a structure is to be created from multiple components, then decisions on appropriate joining methods must be taken at an early stage in the design to ensure all joins are practical. The following factors should be considered when designing joints:

• Load orientation on the joint
• Any fatigue loading on joint during service
• Thickness and geometry of parts to be joined
• Temperature effects
• Effects of exposure to service environments on joint
• Material compatibility to avoid corrosion problems
• Inspection requirements
• Disassembly requirements
• Weight requirements
• Expected manufacturing tolerances
• Manufacturing requirements (cost, skills, equipment, etc)

For both mechanical joint design and bonded joint design, the foundation for success is having knowledge gained from mechanical testing of representative test pieces. The two principal methods for joining composite parts utilise:

	Mechanical fasteners
	Adhesive Bonding