A Technique for Axial/Torsional Thermomechanical Fatigue Testing

A technique for thermomechanical fatigue testing of thin-walled tubular specimens involves the application of cyclic axial (tension/compression) and torsional (shear) strains, along with thermal cycling. In this technique, the phase relationships among the two strain waveforms and the temperature waveform are prescribed and are maintained constant throughout a test.