Question

Mention three elastic moduli

Answer 1

Young's modulus (E) describes tensile elasticity, or the tendency of an object to deform along an axis when opposing forces are applied along that axis.

It is defined as the ratio of tensile stress to tensile strain. It is often referred to simply as the elastic modulus.

2.The shear modulus or modulus of rigidity (G or μ ) describes an object's tendency to shear (the deformation of shape at constant volume)  when acted upon by opposing forces.

It is defined as shear stress over shear strain. The shear modulus is part of the derivation of viscosity.

3.The bulk modulus (K) describes volumetric elasticity, or the tendency of an object to deform in all directions when uniformly loaded in all directions.

It is defined as volumetric stress over volumetric strain, and is the inverse of compressibility.

Answer 2

1. It is defined as the ratio of tensile stress to tensile strain. It is often referred to simply as the elastic modulus.

2. It is defined as shear stress over shear strain. The shear modulus is part of the derivation of viscosity.

3. It is defined as volumetric stress over volumetric strain, and is the inverse of compressibility.

Dimension  

Si unit pascal