Composite Materials and Their Properties

Meredith, a field engineer at One Energy, introduces composite materials, which are substances made by combining two or more materials with different properties. The video explains the benefits of composites, such as enhanced strength and flexibility, and distinguishes between reinforcement and matrix materials. Examples include fiberglass used in wind turbine blades and plywood. The video concludes by encouraging viewers to identify composite materials in their daily lives.

What is a composite material?

• A type of metal alloy

• A single material with uniform properties

• A mixture of two or more materials with different properties

• A material that is naturally occurring

Why might someone choose to combine materials into a composite?

• To make the material more expensive

• To make the material heavier

• To control the characteristics and create specific properties

• To reduce the material's strength

What is the role of the reinforcement material in a composite?

• To provide the main properties desired in the composite

• To dissolve the matrix material

• To reduce the weight of the composite

• To act as a decorative element

What is the function of the matrix material in a composite?

• To provide color to the composite

• To bind the reinforcement materials together

• To increase the cost of production

• To make the composite transparent

What materials make up the wind turbine blades at One Energy?

• Pure glass fiber

• Fiberglass, a composite of glass fiber and plastic

• Metal alloys

• Pure plastic

Why is fiberglass used in bathtubs and showers?

• Because it is transparent

• Because it is flexible

• Because it is hard and unabsorbent

• Because it is absorbent

What is the main difference between lumber and plywood?

• Lumber is a composite material, plywood is not

• Plywood is made from multiple layers of wood, lumber is not

• Lumber is more flexible than plywood

• Plywood is naturally occurring, lumber is not

What is the role of resin in plywood?

• To bind the layers of wood together

• To increase the weight of the plywood

• To act as a decorative finish

• To make the plywood waterproof

What are the reinforcement materials in plywood?

• Plastic fibers

• Glass fibers

• Thin sheets of wood

• Thin sheets of metal

Why are composite materials popular in construction?

• Because they are always cheaper

• Because they have a wide range of uses and are easily accessible

• Because they are naturally occurring

• Because they are always lighter