Enter the stress and strain into the calculator to determine the flexural modulus of a material. The flexural modulus is a measure of a material’s stiffness when it is bent.

## Flexural Modulus Formula

The following formula is used to calculate the flexural modulus:

E = \frac{\sigma}{\epsilon}

Variables:

• E is the flexural modulus (MPa)
• σ is the stress (MPa)
• ε is the strain (unitless)

To calculate the flexural modulus, divide the stress by the strain.

## What is Flexural Modulus?

Flexural modulus, also known as the modulus of elasticity in bending, is a measure of a material’s stiffness or resistance to flexural deformation. It is defined as the ratio of stress to strain in flexural deformation, or the tendency for a material to resist bending. It is an important parameter in engineering and materials science, particularly in the design and analysis of materials that will undergo bending stresses.

## How to Calculate Flexural Modulus?

The following steps outline how to calculate the Flexural Modulus:

1. First, determine the stress (σ) in the material under flexural load, measured in megapascals (MPa).
2. Next, determine the strain (ε) in the material, which is a unitless value representing the deformation per unit length.
3. Use the formula E = σ / ε to calculate the Flexural Modulus (E).
4. Finally, enter the values of stress and strain into the calculator to find the Flexural Modulus.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Stress (σ) = 120 MPa

Strain (ε) = 0.005 (unitless)