The
program reads either hysteresis loop data or the summary data, cycles
vs. max. and min. load and strain data or both; draws a plot of stress
vs. no of cycles. After a few cycles, the stress-strain path generally
becomes stable. A percentage stress decrease defines the ‘failure
cycle count’, Nv. The specific variables determining specimen life
can be calculated directly from the 0.5 Nv hysteresis loop. The loading
and unloading modulus, the plastic and elastic strain portions, max.
and min. strain, mean and amplitude strain, max. and min. stress,
mean and amplitude stress are calculated.
The results can be printed either in graphical form or text form,
either on a laser printer or inkjet printer. The header page can be
customised to the user specifications. |
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