Constraints Mechanical Properties Materials and their Properties

 Stress exerted on a material by a force Tension = Stretch Compression = Crush Torsion = Twist

 How a material reacts when a constraint is applied to it

 Material does not break even if the pressure is great  Ex: Granite counters

 Material stretches when pulled apart  Ex: Copper wires

 Material goes back to original shape after constraint is applied  Ex: Latex gloves

 Material changes shape without breaking  Ex: Gold jewellery

 Withstands degradation of the material by the environment  Ex: Special coatings on metals 5. Corrosion Resistant 5. Corrosion Resistant

 Plastics Plastics  Ferrous alloys Cast iron is harder than steel  Nonferrous metals and alloys Nickel and titanium alloys used for wires in dental appliances have shape memory  Wood and modified wood Oak used for floors because it’s hard, shock and wear resistant