Difference Between Stress and Pressure

The main difference between Stress and Pressure are many, however they are both words that are commonly mistaken for one another. Pressure can mainly be defined as the amount of force that is exerted per unit area. Stress on the other hand refers to the amount of force exerted per unit area, experienced by a material. This is termed as Stress and it is uniquely more different than Pressure.

Difference between Stress and Pressure

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. In order 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 amount of force being exerted per unit area.

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

Stress can be represented as (strain) / (young’s modulus)

Pressure can be mathematically represented as (force) / (area)

Stress can only be exerted on solids.

Pressure on the other hand can be exerted on both liquids and gases.

Stress on the other hand can be either a positive or a negative force, this can be represented as Stress= – F/A.

Pressure is a positive unit and can be represented as F/A

Stress is a unique property of the material.

Pressure on the other hand is a unique property of thermodynamics.

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