Stress-strain curves for brittle and ductile materials. Brittle materials fracture at low strains and absorb little energy. Conversely, ductile materials fail after significant plastic strain (deformation) and absorb more energy. Note that in this idealized example, the yield and ultimate tensile stresses are the same for both materials; brittle or ductile behavior is not necessarily related to strength.
This file was derived from: Stress strain comparison brittle ductile.svg
derivative work: EllieBellie25
Stress strain comparison brittle ductile.svg: Nicoguaro