Behaviour of springs Flashcards
By compressive force, the spring…
is squashed.
By tensile force, the spring…
is stretched.
Restoring force is when…
spring applies equal but opposite force on the person applying the force.
Hook’s law states:
The extension of spring is directly proportional to the force applied until the limit of proportionality is not exceeded.
F=
kx - spring constant x extension
Limit of proportionality is a point…
beyond which behaviour no longer obeys Hook’s law.
Elastic limit is a point…
beyond which the spring will no longer return to its original shape when the force is removed.
Elasticity is…
the ability to regain shape after deforming forces are removed.
The Young modulus is…
the ration of stress to strain for a material obeying Hook’s law.
Stress=
F/A
Strain=
extension/length
Young modulus=
stress/strain
Stress-strain graph:
- a gradient is a young modulus
- the area represents the energy absorbed by the material
The yield point is large…
increase in the extension of a material when the stress is increased beyond the elastic limit.
UTS is…
Ultimate tensile stress, maximum stress experienced before breaking (per unit C.S.A.)
