Hertzian stress or?
Hertzian stress or?
(OP)
LS,
To clamp a measuring device onto a round steel structure, the choice was made to used a kind of "knife". Since the contact area is very small, it is possible to exceed the yield stress of the metal (knife and structure are made from identical materials) and obtain a very stable contactpoint.
Initially we used the formulas for Hertzian stress to calculate the stresses. But the radius of the "knife" blade is difficult to determine and has a large impact on the result. Also plastic deformation will occur, and the contact surface will not be a linecontact anymore.
Does anyone have a suggestion how to solve this?
Thanks,
DYV
To clamp a measuring device onto a round steel structure, the choice was made to used a kind of "knife". Since the contact area is very small, it is possible to exceed the yield stress of the metal (knife and structure are made from identical materials) and obtain a very stable contactpoint.
Initially we used the formulas for Hertzian stress to calculate the stresses. But the radius of the "knife" blade is difficult to determine and has a large impact on the result. Also plastic deformation will occur, and the contact surface will not be a linecontact anymore.
Does anyone have a suggestion how to solve this?
Thanks,
DYV





RE: Hertzian stress or?
this could be a solid piece, like a machined piece profiled to suit both parts, or it could be a formable piece, like epoxy shim.
RE: Hertzian stress or?
RE: Hertzian stress or?
Do you have access to non-linear FEA code? Might this be required?
Can't quite picture what it is you are trying to achieve, but "a radius that is difficult to determine" that has "a large impact on the result" would seem to be an intractable problem. Is it simply the case that it is difficult for you to determine, and that you could get accurate measurements done somewhere else?