materials Flashcards
1
Q
density
A
mass/volume
2
Q
stress
A
force/cross sectional area
3
Q
cross sectional area
A
pi x diameter squared / 4
4
Q
strain
A
change in length/lenght
5
Q
elastic deformation
plastic deformation
A
-object returns to original shape once forces are removed
-object dosent return to original shape after forces are removed
6
Q
breaking stress
A
eventually material will break at a point
7
Q
ultimate tensile stress
A
max stress that the material can withstand
8
Q
youngus modulus
A
stress/strain or gradient of stress strain graph
9
Q
limit of proportionality
A
stops obeying hookes law
