Properties of materials

What is a ductile material?

• a type of material that undergoes significant plasic deformation under tensile stress before fracturing

• a type of material that has a linear stress-strain graph until it fractures

• a type of material that has anon-linear stress-strain curve

Wht is a yield point?

• The maximum stress experiences by a stressed material before it fractures

• The maximum strain that can by applied to a material before it fractures

• The point at which there is a large increase in the extension of a material when the stress is increased beyond the material's elastic limit

What is a Young modulus?

• The ratio of force to extension for a material

• The ratio of stress to strain for a material

• The ratio of strain to stress for a material

What does the point labelled 'y' on this graph represent?

• limit of proportionality

• elastic limit

• yield point

• breaking point

What quantity does the area under the graph represent?

• the spring constant

• the Young modulus

• the elastic potential energy

What does the point labeeled 'z' on this graph represent?

• the limit of propotionality

• the yield point

• the breaking point

• the ultimate tensile stress

What type of material does this graph represent?

• ductile

• brittle

• tough

What material could this graph represent?

• nylon

• steel

• glass