Composite Materials

What is the definition of a composite?

• Composites are when you weld two or more metals together to form a new type of metal.

• Composites are a combination of two or more materials that are bonded together to improve their mechanical or physical properties.

• Composites are when you take 2 or more metals and fuse them through melting.

• Composites are when you take 2 or more matrix and mix them to create a new material.

What are the properties of Kevlar?

• Heavy, incredible strength, low cost

• Flexible, elastic, ductile

• Waterproof, rigid, low cost

• Vibration absorption, incredible strength, abrasion resistance

What does GRP stand for?

• Glass rigid plastic

• Glued rigid polymer

• Glass reinforced polymer

• Glass reinforced plastic

Plywood has the following properties...

• Resistance to cracking, breaking, shrinking, twisting and warping

• Resistance to insects, moisture, mould

• Good weight strength ratio, comes in wider board sizes than solid wood, more economical than using expensive solid wood

• Heavy and relatively weak, easy to cut and join

What must be used to reinforce concrete when making large structures?

• Glass fiber

• Epoxy resin

• Graphene

• Steel reinforcement - steel bars

Why do carbon fiber bicycle frames cost more than aluminum frames?

• The carbon fiber and matrix used to join the fibers are very expensive

• The equipment is very expensive

• The frames are made using multiple pieces of carbon fiber so the process is labor intensive and requires highly skilled workers

• Companies have to pay the patent owner a royalty for each frame they make

A more common term for - CFRP, CRP, CFRTP is ...

• Carbon Fiber

• Construction Fabric

• Concrete

• Reinforced concrete

Advantages of Carbon fiber are ...

• Mass production processes can be used to bring down costs

• Low skilled workers to create complex shapes

• Cheap to produce complex shapes

• Complex shapes can be created that are extremely strong and lightweight

Composites are ______ joined

• mechanically

• chemically

what is reinforcement

• fibers or particles that give the composites strength,stiffness and density

• a composite with different sets of properties than its constituent materials

• decrease in cracking by distributing stress evenly

• fillers added to save money or modify properties