Stress / Strain Graphs# Flashcards
1
Q
What is the gradient of a stress/strain graph ?`
A
young modulus
2
Q
What is the area of a stress /strain graph?
A
elastic strain energy per m^3 up to the limit of proportionality of hooke’s law
3
Q
What do I have to be able to interpret from a stress/ strain graph?
A
- the limit of proportionality
- elastic limit
- yield point
- breaking stress
- UTS (for tensile forces)
4
Q
What is the equation for elastic strain energy per unit volume?
A
1/2 stress strain
5
Q
What happens at the yield point?
A
the material starts to stretch without any extra load.
- it is a point at which large amount of plastic deformation takes place with constant or reduced load
6
Q
What is another name for the yield point?
A
The yield stress
7
Q
The elastic strain energy per unit volume is a measure of what?
A
toughness
it is also called the energy density
