Hydraulic grips clamping force
Hydraulic grips clamping force
(OP)
Hello there,
I've got a problem regarding the clamping force on hydraulic grips on a universal testing machine.
For aluminium alloys works fine, but when i try on steel, it fails maintaining the clamping force on the grips.
The question: are there specifications regarding clamping forces for specimens?
Thank you in advance, and excuse the bad english.
I've got a problem regarding the clamping force on hydraulic grips on a universal testing machine.
For aluminium alloys works fine, but when i try on steel, it fails maintaining the clamping force on the grips.
The question: are there specifications regarding clamping forces for specimens?
Thank you in advance, and excuse the bad english.





RE: Hydraulic grips clamping force
Also check the limits on sample size.
Get the manual for your testing machine and checkout it's capabilities as some are not intended for Steel. We have machines that are only good for polymers, composites, etc. A lot of machines that are capable of testing different materials require one to change the jaws are grips for different materials.
RE: Hydraulic grips clamping force
RE: Hydraulic grips clamping force
The machine it's a hydraulic 300kN testing machine.
All sample can and are fixed within grips, but, after test
is started, at different load(10-15kN) values, for steel samples
the test stops, claiming that a break was detected.
The sample did not break.
Bellow are some pictures with the grips and the sample.
The sample is deformed after retrieval.
RE: Hydraulic grips clamping force
RE: Hydraulic grips clamping force
Are the jaw teth sharp and clean>
Are the jaws harder than your steel sample?
Does this happean at the same load each time?
RE: Hydraulic grips clamping force
at least so it seems.
Thank you all for the sugestions.
RE: Hydraulic grips clamping force
Hope you have it under control.