MATS 3011 Lecture Notes - Ductility
Document Summary
Strain hardening: load material in tension, once plastic deformation occurs, release the load, re-load. Y(new) is higher than previous y (strain hardening) material 1 material 2. Red = materials that = very brittle, fracture easily. Black: ductility: ability of material to deform plastically. Measure of plastic deformation that has been sustained at fracture blue = ductility of material 1 (percentage deformation before fracture) x length until fracture of red = ductility of material 2. Matsci page 1 examples of ductile materials: metals not ductile: ceramics (brittle) Toughness of material = area under stress/strain curve until fracture. Capacity of a material to absorb energy when it is deformed elastically & upon unloading have this energy recovered. Area under linear portion (elastic) of stress-strain curve = modulus of resilience. Area under that part of curve = (1/2) y y. If you have no straight line in stress/strain curve.
