Bending Tests usually are performed according to standards, such as 2-, 3- or
4-point bending tests to investigate materials or components. These standards
are no longer applicable, if the material to be tested can undergo large deflections
and thus elongations of several percent, such as superelastic Ni-Ti alloys. Strain
concentrations around the bearings would give rise to large bending angles, resulting
in buckling of the specimen.
Consequently a procedure is required which ensures a circular shape of the
specimen throughout the entire range of bending angles even if the major deflections
occur. This procedure was developed in FATIBEND.
Moreover, the station can also be employed to study, e.g. the delamination behavior
of thin films deposited onto substrates under cyclic bending load.
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