Limit of proportionality=
Hookes law=
Hookes law=
What features of a graph confirm a spring obeys hookes law?
How does a graph show the material does NOT exhibit plastic behaviour?
Area under graph=
Brittle=
Youngs modulus=
Density=
Ductile=
Tough material=
Small youngs modulus of a material means it is what?
UTS- Ultimate Tensile Stress=
Yield Point=
Elastic limit=
Hookes law limit=
- point beyond which force no longer proportional to extension
Hookes law=
- return to original length
Hookes law=
- force is proportional to extension
- up to limit of proportionality
What features of a graph confirm a spring obeys hookes law?
- straight line
- through origin (0, 0)
How does a graph show the material does NOT exhibit plastic behaviour?
- no permanent extension
Area under graph=
- work done
Brittle=
- material brakes without any deformation
- breaks during elastic deformation
Youngs modulus=
- stiffness of a material in Pa (pascals)
Density=
- mass per unit volume
Ductile=
- ability to be drawn into wires
Tough material=
- will deform plastically before it breaks
- can withstand shock and impact
Small youngs modulus of a material means it is what?
- stretchy
UTS- Ultimate Tensile Stress=
- highest stress just before the wire brakes
Yield Point=
- beyond this point little extra force is needed to produce a large extra extension (creep occurs)
Elastic limit=
- beyond this point the deformation is plastic and if the load was unloaded, the wire would be left with a permanent extension
Hookes law limit=
- point beyond which the strain is no longer proportional to stress for elastic deformation