AIrcraft Structure: Composite Materials in Aerospace

What is required for the repair of advanced composite materials?

• Basic knowledge of metals

• In-depth knowledge of composite structures

• Simple tools

• General engineering skills

What are composite materials made of?

• A combination of materials mixed together

• A single type of material

• Only metals

• Only plastics

Which of the following is NOT an application of composites on aircraft?

• Flight control surfaces

• Landing gear doors

• Engine oil

• Propellers

What is a unidirectional composite?

• Fibers run in multiple directions

• Fibers run in one direction

• No fibers are used

• Fibers are randomly oriented

What is the main advantage of bidirectional fabric constructions?

• They are lighter than unidirectional tapes

• They offer more flexibility for complex shapes

• They are cheaper to produce

• They have higher tensile strength

What is the main use of tapes in unidirectional prepreg products?

• To add color

• To hold fibers in place

• To increase weight

• To reduce cost

What is the common construction method for woven structural fabrics?

• Interlocking with reinforcement tows, strands, or yarns

• Using adhesive bonding

• Sewing with threads

• Gluing with resin

What is E-glass identified for?

• Electrical applications

• Thermal insulation

• Soundproofing

• Decorative purposes

What is a disadvantage of S-glass compared to E-glass?

• Lower strength

• Higher strength

• More expensive

• Less flexible

What is the main disadvantage of Kevlar® fibers?

• Difficult to drill and cut

• Too flexible

• Too heavy

• Not durable