3.4.2.2 The Young Modulus Flashcards
1
Q
What is the young modulus?
A
The young modulus is a measure of how stiff a material is, It is useful for comparing the stiffness of different materials.
2
Q
What are directly proportional up to the limit of proportionality?
A
Stress and Strain are both directly proportional.
3
Q
What is the equation for the young modulus?
A
Young Modulus = Tensile Stress / Tensile Strain.
4
Q
What is the unit for the young modulus?
A
N/m^2 or pascals.
5
Q
What does the gradient of a stress-strain graph represent?
A
Stress / Strain = Young Modulus.
6
Q
What is the energy per unit volume for a stress strain graph which is a straight line and Hooke’s law is obeyed?
A
Energy per unit volume = 1/2 x stress x strain.
