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Young’s Modulus

Young’s modulus or elastic modulus is a mechanical property of linear elastic solid materials. It defines the relationship between stress and strain in a material and is given by:




where, ‘E


‘ is the Young’s modulus of the material, ‘σ


‘ and ‘ϵ


‘ are the stress and strain respectively.

When a load is applied to the material, the material deforms. The material is called elastic if it returns back to its original shape after the load is removed. A constant Young’s modulus means that the relationship between stress and strain is linear. A material is said to be very rigid if the Young’s modulus is very high.

Strain-Strain curve of a linear elastic material

Young’s Modulus has a units of pressure or stress, since the strain is dimensionless quantity.

Last updated: January 21st, 2020

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