Mechanical Properties Of Materials

Mechanical Properties Of Materials

1. Stress

   • Stress = Force Divided by Cross Sectional Area (Internal reactive forces transmitted through the material subjected to loading)
     • 2 Types of Stress = Normal Stress and Shear Stress
       • Unit for Stress = Pascal
       • Strain = Dimensionless is the amount of elongation per unit length

2. Youngs Modulus of Elasticity

   • Youngs Modulus is the measure of how Rigid or Stiff a material is
     • Tensile Testing = Tensile tests can tell us a number of material properties
       • Tensile tests can tell us that Strain and Stress are proportional to one another
         • Can also tell us the Elastic or yield point, As in if the load is removed before it reaches a certain stress level the material will go back to its original form. Also known as " Elastic Behaviour"
           • UTS = Point at which the load bearing ability of the specimen peaks. If more is added to material this will result in load bearing capacity of the material being diminished
             • Ductile Materials will begin to neck an then Break
               • Breaking or Fracture Strength
             • Brittle Materials will fracture

3. Ductility: The point of which the specimen will break

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