A unique elevated-temperature tension-torsion fatigue test rig |
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Authors: | E H Jordan C T Chan |
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Institution: | (1) Mechanical Engineering, University of Connecticut, Room 200, 191 Auditorium Road, Box U-139, 06268 Storrs, CT |
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Abstract: | A unique tension-torsion fatigue test set up is described that allows strain-controlled tests at temperatures exceeding 649°C.
The machine uses a large die set as a load frame resulting in lower cost and superior parallel positioning of the crossheads.
Disposable weld-on grips were found to be cost effective for elevated-temperature testing. A new extensometer using commercially
available capacitance probes was developed which can operate at the elevated temperature without cooling. Capacitance ring
probes were utilized in an attempt to measure through-thickness strains. The characteristic behavior of the ring probes is
discussed. Design modifications needed to make a successful measurement of through-thickness strains at elevated temperatures
are presented. |
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Keywords: | |
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