Ability of mechanical parts to resist deformation. In the elastic range, stiffness is the proportional coefficient of the load and displacement of parts, that is, the force required to cause unit displacement. Its reciprocal is called flexibility, which is the displacement caused by unit force. Stiffness can be divided into static stiffness and dynamic stiffness.

Stiffness (k) of mechanism refers to the ability of elastic body to resist deformation (bending, stretching, compression, etc.). ). Calculation formula:

k=P/δ

P is the constant force acting on the mechanism, and δ is the deformation caused by this force.

The international unit of stiffness is Newton per meter (N/m).

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