4.8 - The Young Modulus

Question 1

What is the Young Modulus?

Answer 1

The measure of the ability of a material to withstand changes in length with an added load.

Question 2

What does the Young Modulus tell us?

Answer 2

-Gives information about the stiffness of a material (k)
- helps engineers make sure the materials they are using can withstand sufficient forces

Question 3

What is the Young Modulus defined as? (equation)

Answer 3

Youngs modulus = tensile stress / tensile strain

YM = FL / AΔL
F = force
L = original length
A = cross-sectional area
ΔL = extension

Question 4

What are the units for the Young Modulus?

Answer 4

Pascals (Pa). The same as stress.

Question 5

What is the gradient of a stress-strain graph?

Answer 5

The Young Modulus. (where it is linear)