Basics of Mechanical Engineering

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Stress-Strain Diagram for Non - Newtonian Alloys

Stress-Strain diagram:
 Properties of Newtonian Fluid:
  • an ideal fluid
  • shear stress proportional to shear strain
  • straight line on curve
  • viscosity = shear stress/ shear strain
  • constant velocity
 Properties of Non-Newtonian (Psuedoplastic) Fluid:
  • viscosity decreases with increasing shear stress, until it reaches a nearly constant value.
  • Examples - Ketchup, Blood, Nail polish
 Stress-Strain diagram for Viscous Fluid & Plastics Materials:

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