## Types of Elastic Modulii

There are two types of elastic modulus based on the nature of the stresses:

1)Modulus of Elasticity ( compressive or tensile stress )

2)Modulus of Rigidity ( Shear stress )

## Modulus of Elasticity

#### ” Modulus of Elasticity is also called as “Young’s Modulus”. The ratio of tensile stress or compressive stress to corresponding stain is a constant. This ratio is known as Young’s Modulus or Modulus of Elasticity and is denoted as ‘E’ “

**Young’s modulus is given by :**

Formula for Young’s Modulus. |

## Modulus of Rigidity:

” Modulus of Rigidity is also known as ‘ Shear Modulus’. The ratio of Shear stress to the corresponding Shear strain within the elastic limit, is known as Modulus of Rigidity “

**Shear Modulus is given by:**

Formula of Shear Modulus |

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