Are stress and pressure additive?

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Pressure and stress are defined as force per area, meaning if a uniform pressure of 1 atm is applied to a square rod, each sub-square of the rod's face experiences the same pressure. The discussion clarifies that if the force per area is consistent across the surface, the pressure remains uniform. Therefore, each section of the square face will experience the full 1 atm of pressure, not a fraction of it. The concept reinforces that pressure is additive in this context, as each point on the face experiences the same force per area. Overall, the pressure applied is uniformly distributed across the entire surface.
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If we have some pressure/stress (say 1 atm) applied to an end of a square rod. Let's say this square face expression this pressure/stress is discretized into 4 squares of equal area. Each each sub-square experience 1 atm or 1/4 atm?
 
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Pressure and stress are "force per area". If the force per area is the same everywhere, you have the same pressure or stress.
 
mfb said:
Pressure and stress are "force per area". If the force per area is the same everywhere, you have the same pressure or stress.
Oh, so each face would be experiencing 1 atm?
 
Each point will experience this pressure.
 

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