7.6. Stress Strain Curves#
Stress is the primary physical quantity that is used to determine whether a structure can withstand the external forces applied to it.
It is not the force that is the limiting factor – it is the amount of stress the material can withstand.
Material Properties#
The following material properties can be derived from a stress-strain curve.
Stiffness: slope in elastic range
Ductility: total amount of plastic deformation
Yield stress = \(\sigma_y\) = yield strength: transition out of elastic range
Ultimate stress = \(\sigma_{UTS}\) = ultimate strength: highest stress