2. Presentation
2.1 Definition and units
Pressure can be defined in several equivalent ways, depending on the branch of physics under consideration. In mechanics, it is defined locally as the ratio of the force perpendicular to a surface (pressing force) to the surface area:
with :
- P :
-
pressure (in Pa) (see Note),
- F :
- norm of pressing force (in N),...
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Pressure on the material
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