The rotary bending test to DIN 50113 serves to determine the reversed bending stress strength of round specimens. In the dynamic fatigue test to DIN 50100, a sinusoidal varying load is applied to round specimens.
In both applications with the rotary bending testing machine, the specimen is stressed strictly varyingly. As the stress is highest at the specimen surface, the surface condition of the specimen is particularly important in these test processes.
The Zwick vibrophore can be used for dynamic tests to determine the vibration resistance over time and the fatigue strength of materials and components, for example, dynamic fatigue tests to DIN 50100 (Wöhler curve) under tensile, pressure, cyclic, and alternating loads.
The vibrophore can also be deployed to build up oscillation in CT or COT specimens for fracture mechanics tests on components such as camshafts, connecting rods, axle pivots, and screws.
With the appropriate add-ons, tests under different environmental conditions (temperature, aggressive media) or torsion and bending tests are possible. The various tests can be either force or strain controlled.
The fracture mechanical parameters such as the KIC value to ISO 12135 6.2 or ASTM E 399 or the CTOD 0.2 BL value to ISO 12135 7 can be determined either with static or dynamic testing machines and the appropriate testXpert® software.
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