Difference Between Stress and Pressure

There are many differences between Stress and Pressure. However, they are both words that are commonly mistaken for one another. Pressure can mainly be defined as the force exerted per unit area. On the other hand, stress refers to the amount of force exerted per unit area experienced by a material. This is termed stress, and it is uniquely more different from pressure.

Difference between Stress and Pressure

By understanding the major differences between stress and pressure, one can know the key separating points between one and the other.  We know that pressure is an external quality that affects the object from the outside, while stress affects the object from the inside. To understand the effects of stress better, it is important to understand the relationship between stress and strain.

Difference between Stress and Pressure

Stress

Pressure

Stress can be defined as the internal resistive force to the deformation per unit area. Pressure can be defined as the amount of force applied per unit area.
Due to stress, the pressure will not be developed. Due to pressure, stress will be developed.
Stress can be either a positive or a negative force. The pressure is always a positive force.
Pressure is exerted externally. Stress is developed internally.
Stress may be tensile, compressive and shear. Pressure is always compressive.

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Frequently Asked Questions – FAQs

Define pressure.

Pressure is defined as the amount of force applied per unit area.

What is stress?

Stress refers to the force exerted per unit area experienced by a material.

State true or false: Stress is developed externally.

False, stress is developed internally.

What is the formula to calculate the pressure?

Pressure is given by the formula: P=F/A
Where,
P=pressure
F=force
A-area

What is the formula to calculate the stress?

Stress is given by the formula:
\(\begin{array}{l}\sigma=F/A\end{array} \)
Where,
σ=stress(N/m2)
F=Force
A =Area on which force is acting
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