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Richard Smith[_4_] Richard Smith[_4_] is offline
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Default hydraulic valve - opens on set pressure, closes no pressure

Leon Fisk writes:

And what about heat? Flexing metal creates heat. If you accelerate
flexing to speed up failure detection you will likely create heat that
would not be present in its actual use...

Leon Fisk
Grand Rapids MI

Heating is pretty negligible.
On a resonant machine you can test at up to around 300Hz and there is
no drift in values obtained compared to at much slower rates.
You have full elastic energy recovery.

Servo-hydraulic - not recovering elastic energy with the drive heats
the oil away from the sample where you dump the pressure - and you
dump that heat through "raditiators" (forced convectors transfering

But the sample is seeing full energy recovery / negligible energy