constraints mechanical properties materials and their properties
TRANSCRIPT
ConstraintsMechanical 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
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