The Mechanical Engineering Handbook



Normal Strain

Normal Strain Equation



$$ \epsilon = \frac{\Delta L}{L_0} $$ where:

ε   =   Normal Strain   (Dimensionless)

Δ L   =   Change in length of the material   (m)

L0   =   Original length of the material   (m)


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Equation Assumptions



  • The material is linear elastic.
  • The material deformations are small.
  • The material is homogeneous.
  • The material is isotropic.