Estimating the response to torsional loading requires the use of a dedicated torsional test rig. Alternatively, an adapter that converts an usual tension-compression loading
into torsional loading can be applied. The adapter also enables the measurement of the torsional stress-strain response. In this master thesis, an adapter was designed for
the implementation of torsional loads on a tensile-compressive test rig. An analytical and numerical model were built to ensure the adapter’s evaluation. Then, fatiguelife
experiments were conducted at various levels to plot the Coffin-Manson curve and incremental test to determine the stabilized cyclical curve. The results of the analytical
and numerical model were carried out with the results determined experimentally. The test rig was evaluated in a way that allows changing the material of the specimen,
repeating the calibration process and performing a larger number of experimental tests.
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