In contrast, ideal fluids can only be subjected to normal, compressive stress which is called pressure.
They develop in areas of compressive stress, such as where a valley widens or bends.
The surface wants to expand creating a compressive stress.
The tool path and normal pressure applied are designed to create a distribution of compressive residual stress.
Physical compression means that a material under compressive stress reduces its volume.
One can increase the compressive stress until compressive strength is reached.
It is this compressive stress that gives the toughened glass increased strength.
The greatest compressive stress is normal to fold axial planes.
The source of the compressive stresses is still debated.
These methods create deep compressive residual stresses to increase component life.