Solid Materials Flashcards
what is σ
stress
what is ε
strain
what is F
force
what is A
cross sectional area
what is x
original length
what is Δx
extension
what is E
young modulus
what is k
spring constant
what is stress measured in
PA or Nm-2
what is strain measured in
Nothing- it is a ratio
what is force measured in
Newtons
what is A measured in
m2
what is x and Δx measured in
m
what is E measured in
Nm-2
what is k measured in
Nm-1
In order, what are the points on a stress/strain graph?
limit of proportionality
elastic limit
yield point
Ultimate Tensile Strength
breaking point
What is the area under a stress strain graph (straight part)
work done per unit volume
what is the limit of proportionality
maximum point where stress is directly proportional to strain
what is the elastic limit
point where material stops behaving elastically
what is the yield point
point before which atomic structure of material is reorganised and lower force is needed for same extension
what is the UTS
maximum stress a material can handle
what is the breaking point
point where material breaks (duh)
area between loading and unloading lines on stress strain graph=
energy transferred to internal energy in the material
what is a stiff material
resists deformation by tension or compression
