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Young’s (Elastic) Modulus

  • With regard to human tissues, applies mainly to bone 
  • Defines the relationship between stress (force per unit area) and strain (proportional deformation) in a solid material 
    • A stiffer material (such as a metal) requires more force to be deformed, thus it has a higher Young’s (elastic) modulus 
    • A softer material (such as an elastic band) requires less force to be deformed, thus it has a lower Young’s (elastic) modulus 
  • Directionality: 
    • Isotropic = the elastic properties are the same in every orientation 
    • Anisotropic = the elastic properties change with direction of the force applied