Which material is a matrix material listed for aircraft composites?

Which material is a matrix material listed for aircraft composites?

• A. Epoxide resin
• B. Kevlar
• C. Nomex
• D. Boron

Answer: (A)

In composite materials, the matrix is the continuous phase that binds the reinforcement fibers together and transfers loads between them. Epoxide resin (epoxy) is a common thermosetting matrix used in aircraft composites because it forms a strong, stiff, and durable network that adheres well to reinforcing fibers like carbon or glass, provides good chemical and environmental resistance, and cures to a stable structure. The other materials are reinforcements rather than the matrix: Kevlar and Nomex are aramid fibers used to add strength and toughness, while boron is another type of reinforcing material. They are not the matrix that binds the fibers together, which is why epoxide resin is the correct choice.

In composite materials, the matrix is the continuous phase that binds the reinforcement fibers together and transfers loads between them. Epoxide resin (epoxy) is a common thermosetting matrix used in aircraft composites because it forms a strong, stiff, and durable network that adheres well to reinforcing fibers like carbon or glass, provides good chemical and environmental resistance, and cures to a stable structure.

The other materials are reinforcements rather than the matrix: Kevlar and Nomex are aramid fibers used to add strength and toughness, while boron is another type of reinforcing material. They are not the matrix that binds the fibers together, which is why epoxide resin is the correct choice.