-: Pressure and Stress :
Pressure :-
- Pressure represents the intensity of external or outside forces exerting or acting at a point.
- in other words - it is the amount of external force applied per unit area.
- Magnitude of the Pressure at a point, remains same in all the direction.
- Due to pressure Stress will be developed.
Pressure = F/A in N/meterSq.
where F = External applied force (external) in N
A = Area in meterSq.
Stress :-
- Stress is the intensity of internal resisting forces (to oppose the applied pressure) developed at a point.
- in other words - it is a internal resistive force to deformation per unit area.
- Stress may act either normal or parallel to the surface.
- Magnitude of the stress at a point is unequal in all the directions.
- Stress can be Tensile, Compressive or Shear type.
- Due to stress Pressure will not be developed.
Stress = F/A in N/meterSq.
where F = internal resistive force developed (external) in N
A = Area in meterSq.
