The term compression refers to the reduction in the length or thickness of a body. External influences are responsible for this deformation. The compression is the result of a compressive force.
The opposite of compression is elongation, in which the dimensions of a body increase. Both processes are directly related. If a body is compressed in the longitudinal direction, its cross-section increases (elongation) so that the volume is approximately maintained. This principle is called transverse contraction.
The deformation resistance of the body counteracts the compressive force. If the compressive force on a body is too great, it can buckle.
#1 Definition of compression
A compression is a reduction in the length or thickness of a body caused by a mechanical compressive force.
#2 Meaning of the compression
When designing O-ring seals, the focus is on the compression, expansion and compression of the seal. They must be selected so that the resulting deformation of the cord diameter is within the target range for a reliable seal.