# Flexural Rigidity of Beam is a Product of

By BYJU'S Exam Prep

Updated on: September 25th, 2023

### Flexural rigidity of beam is a product of

1. modulus of elasticity and mass moment of inertia
2. modulus of rigidity and area moment of inertia
3. modulus of rigidity and mass moment of inertia
4. modulus of elasticity and area moment of inertia

Answer: D – modulus of elasticity and area moment of inertia

## Flexural rigidity of beam is a product of modulus of elasticity and area moment of inertia.

Solution:

From the bending moment equation,

σ/y = M/I = E/R

Flexural rigidity = EI

Unit of flexural rigidity: Nm2

Where

• E= modulus of elasticity
• I = area moment of inertia

Notes:

1. The bending moment required to produce unit curvature in a beam is given by flexural rigidity.
2. Flexural rigidity describes the resistance provided by a structure when bent.
3. The beam with a higher flexural rigidity has a lower deflection value.

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