MATERIAL PROPERTIES

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MATERIAL PROPERTIES
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3 TYPES

• Mechanical
• Thermal
• Chemical

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MECHANICAL

• Mechanical properties are characteristics
  exhibited when outside forces are applied to
  them.
• Tension
• Compression
• Elasticity
• Plasticity
• Brittleness
• Toughness
• Ductility

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Tension

• Tension is the pulling force acting upon an
  object.
• Tensile strength is the ability of a material to
  resist stretching.

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Compression

• Compression is the pushing force acting upon an
  object.
• Compressive strength is the ability of a material
  to resist compression.

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Strain vs. Stress

• Strain Is defined as the change in length
  caused from a force.
• Equation Change in length / original length

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Strain vs. Stress

• Stress Is defined as the force applied to a
  given area of the object.
• Equation Force / Area

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Elasticity

• Refers to a materials ability to return to its
  original size and shape once the force has ended.
• 2 conditions
• Must not stretch so much that it fails under
  load.
• Must return to original size after load has been
  removed.

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Plasticity

• Opposite of Elasticity.
• Does not change back to original shape after
  materials has been removed.
• An undesired characteristic

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Brittleness

• Opposite of Plasticity
• Refers to the ease at which a material will break
  with little or no bending.

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Toughness

• Refers to the ability to withstand sudden shock
  without breaking

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Ductility

• The ability of a material to be changed in shape
  without breaking