Topic 4.1 Properties of materials

What is the difference between mass and weight?

Properties of materials that are usually measured through some form of destructive testing

• Physical properties

• Mechanical properties

The ability to a material to bend and then return to its original shape

• Elasticity

• Plasticity

What is a Young modulus?

• The ratio of force to extension for a material

• The ratio of strain to stress for a material

• The ratio of stress to strain for a material

What type of material does this graph represent?

• ductile

• tough

• brittle

Which of the following is not a smart material?

• CFRP

• Pizo Electric materials

• SMA

• Thermo chromic paints

A smart material is

• a material that has a Phd.

• a material that changes a property in response to an environmental trigger.

• a material that changes its properties during the manufacturing process.

The ability of a material to absorb energy and plastically deform without fracturing -

• stiffness

• toughness

The ability of a material to withstnd pulling forces -

• tensile strength

• compressive strength