Constraints Mechanical Properties Materials and their Properties.

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Constraints Mechanical Properties Materials and their Properties

Transcript of Constraints Mechanical Properties Materials and their Properties.

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