What is difference between stress and pressure?

The internal force acting over a cross-sectional area within the material is termed stress, whereas the force applied per unit area typically used inside a fluid is termed pressure.

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 The pressure is always compressive
The magnitude of stress at a point in a different direction is different. The magnitude of the pressure at a point in all the directions remains the same.

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