What is the difference between stress and pressure in physics?
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Stress is defined as the internal resistive force to deformation per unit area. |
Pressure is defined as the amount of force applied per unit area. |
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(strain) / (Young's modulus) can be used to represent stress. |
Pressure can be expressed mathematically as (force) / (area) |
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Stress is a material characteristic. |
Pressure is a distinctive feature of thermodynamics or physics. |
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Stress can be viewed as either a beneficial or negative force. |
The force of pressure is always a positive force. |
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There is no stress measurement instrument (not a measurable quantity). Strain or elongation are used to calculate stress. |
Pressure gauges, manometers, and other pressure measuring equipment or instruments are used to physically measure (measure) the pressure.
Tensile, compressive, and shear stress are all possible.
Compressive pressure is constantly present.
