This document specifies the principle,specimen,testing equipment,testing procedure,data processing analysis,and test report of combined axial-torsional fatigue testing under strain-controlled loading for metallic materials.
This document is applicable to the combined axial-torsional fatigue testing under constant amplitude completely-reversed strain loading(zero mean strains)with the same frequency of axial and torsional waveforms for the thin-walled tubular metal specimens at room temperature and elevated temperature.
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