# What is the formula for bulk or volume stress?

Posted in Elasticity | Email This Post |When an external deforming force is applied on the body it produces change in volume of body which is known as volume or bulk stress.

The formula for bulk or volume stress is given as,

Bulk Stress or Volume Stress = Change in magnitude of Force / Area

We know that Force can also be expressed as Force = Pressure x Area

Bulk Stress or Volume Stress = Change in Pressure / Area

**Bulk Stress or Volume Stress = Change in Pressure (Δ P)**

**Bulk Stress or Volume Stress = Δ P**