File talk:Brittle v ductile stress-strain behaviour.png

The energy absorbed cannot be interpreted as the area under the curve ; as the dimensions of stress σ are M.L⁻¹T⁻² , or pressure (in Pa) ; and the strain ε is dimensionless , and thus the area discussed has dimensions [σ][ε] , which is M.L⁻¹T⁻² , or pressure (in Pa).