首页|Cyclic stress-strain curves generated from random cyclic strain amplitude tests
Cyclic stress-strain curves generated from random cyclic strain amplitude tests
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NETL
NSTL
Cyclic tests have been carried out to investigate the cyclic behavior of two steels using a random sequence of cyclic strains. The waveform was triangular with a constant strain rate between reversals. It was found that a plat of stress and strain differences between curssessive reversals exhibited an apparent dual elastic region which was attributed to a stress relaxation effect occurring at each reversal. The use of stress and strain differences taken at the end of a small pause introduced at each reversal eliminated the dual nature of the curve. It is proposed that the use of a random cyclic strain sequence with a pause at each reversal would provide an alternative method of measuring cyclic stress-strain curves which would have advantages over existing methods.
NETL
NSTL
