Material Properties Flashcards
DMM1: Materials Deck 1
1
Q
describe stress and strain
A
strain: ratio of extension with intitial length
Stress: the force applied per unit cross sectional area
2
Q
what is the difference between plastic and elastic behaviour?
A
Elastic: low reversable strain where strain is proportional to stress
Plastic: Higher perminent strains where stress is not proportional to strain
3
Q
define yeild stress
A
Stress at which plastic
deformation occurs
4
Q
Define UTS
A
Stress at which complete failure occurs
5
Q
What is Necking?
A
at high stress the strain can cause the cross sectional area to reduce
6
Q
What is hardness?
A
Ability of material to resist
plastic deformation of surface
7
Q
What is Ductility?
A
a materials ability to plastically deform as it is drawn out under tensile stress
8
Q
A
