Modulus of Elasticity

Table of Contents

• Modulus of Elasticity
• Unit and Dimension
• Different types of moduli of elasticity:

Modulus of Elasticity

The modulus of elasticity or coefficient of elasticity of a body is defined as the ratio of stress to the corresponding strain, within the elastic limit.

Modulus of elasticity,

E = Stress / Strain

Unit and Dimension

The SI unit of modulus of elasticity is Nm^-2 and its dimensions are [ML^-1T^-2].

Different types of moduli of elasticity:

Corres­ponding to the three types of strain, we have three important moduli of elasticity:

(i) Young’s modulus (Y), i.e., the modulus of elasticity of length.

(ii) Bulk modulus (κ), i.e., the modulus of elasticity of volume.

(iii) Modulus of rigidity or shear modulus (η), i.e., modulus of elasticity of shape.