Flexure bearing

As a solid joint, any area of a component, which allows relative movement ( rotation) between two rigid parts of the body by bending.

Function

The flexure hinge is not a "real " joint in the sense of a kinematic pair, but is based on the principle of elastostatics (elasticity). The function of a hinge is achieved by a region of reduced flexural rigidity in relation to the two adjacent regions of higher bending stiffness. The reduced bending stiffness is mostly generated by local necking. A solid-body joint can be compared with a conventional rotary joint, which has a limited rotational range.

Application

Solid joints are often used, especially in microsystem technology, because real joints, which consist of at least two classical coupled individual elements, are difficult and expensive to manufacture and assemble in microscopic dimensions. In normal dimensions form solid joints wear as part of an inexpensive alternative to synovial joints. In the classical machinery and equipment, they are rather rare because of their lower life safety function, used in the area particularly cost-effective solutions on the other hand often.

Restriction

A significant disadvantage arises due to the strong material fatigue in bending or continuous oscillation (see fatigue test ). According to the very different fatigue strength of materials solid joints can not be achieved with any material.