Material Properties

Question 1

What properties can be determined from a tensometer?

Answer 1

. Elasticity
. Ultimate tensile force
. Ductility or plasticity

Question 2

What is elastic deformation?

Answer 2

Material stretches under loading. When force is removed, it returns to its original length/shape.

Question 3

What is plastic deformation?

Answer 3

Material stretches under loading. Once force is removed, it does not return to original shape/length.

Question 4

How do you carry out a tensile test, and what equipment is needed?

Answer 4

A tensometer is needed.

Create a test specimen. Place into the tensometer. If it is manual, turn the handle. A graph of results is produced. Material is tested to failure.

Question 5

Draw a test specimen and indicate on the drawing two important physical readings that would have to be taken at the beginning of the test.

Answer 5

Look at red jotter for answer.

Question 6

Explain the link between Young’s modulus and material properties.

Answer 6

A high Young’s modulus means a high level of stiffness, and vice versa.

High values of Young’s modulus will result in a steeper line on the stress strain graph.