
#1
May1312, 02:07 PM

P: 27

Both pressure and stress are defined in terms of force per unit area. Beyond that simple relationship, what might constitute a good intuitive way to distinguish these two concepts?




#2
May1312, 02:34 PM

P: 349

They are basically the same thing and the terms used tend to reflect context rather than physics. You would use 'Stress' when dealing with stretching etc, pressure when dealing with gases etc.
Similar 'problems' occur with Newton.metres which can mean work or energy (Joules) or moment as in turning effect and torque 



#3
May1312, 05:47 PM

Sci Advisor
PF Gold
P: 11,353

Pressure and stress, however, are totally equivalent and it's only the context that determines which term you want to apply to a situation. (It's not really a "problem") 



#4
May1312, 07:30 PM

Sci Advisor
P: 5,468

difference between pressure and stress'stress' is the most general way to describe any deformation, while pressure is restricted to the uniform expansion/compression. Mathematically, pressure is the isotropic component of the stress tensor. 


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