• Stress and pressure are the two important terms used frequently in science and technology.
  • Though they give the same meaning, there are unique characteristics for each term.
  • Could you explain clearly the

Difference Between Them with Some Examples?

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

Pressure is used in situations of mechanical things where a certain amount of pressure is applied in a hydraulic machine. Stress is related to material engineering where it is used with regard to the wires and sheets.

  • Pressure is the external force acting a body per unit area. Pressure belongs to the thermodynamic property.
  • Pressure is given by (force)/(area)

Stress: Stress is the amount of force per unit area experienced by a material.
So the pressure is the external quality whereas stress is an internal force experienced by a material.

  • Stress is a force generated internally when an external force acts on a body.
  • Stress has structural properties. It is developed within a body to resist an external force.

Difference Between Stress and Pressure in tabular form

Stress

Pressure

  • Stress can be defined as “The amount of force per unit area experienced by a material”.
Pressure can be defined as “The amount of force applied per unit area”.
  • Stress can be represented as strain.
Pressure can be represented as force and area.
  • Due to stress, the pressure will not be developed.
The pressure is always a positive force.

The pressure is an intrinsic property and most of the time related to fluids. It depends on the momentum transfer between the atoms of a liquid or gas volume (molecules constrained inside the volume) on a micro-scale.

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