Contact permeance coefficient

rickfischer51 · Jan 7, 2021

Does anyone know of a source for contact permeance coefficients in Henries/m2? I'm trying model magnetic fields in steel plates that are in physical contact with each other. I'm using the old LF emag still in Ansys mechanical, and it supports bonded contact. The contact element has a MAG dof and a real constant for the contact permeance coefficient. I have an idea of the value I need to use, but it would help to have some documentation to back it up.

Rick Fischer
Principal Engineer
Argonne National Laboratory

MagMike · Jan 7, 2021

I've not used that term before but I found this:

https://www.mm.bme.hu/~gyebro/files/ans_help_v182/ans_thry/thy_el174.html#thy174magnet

It mentions Magnetic Contact Permeance Coefficient

Hope it helps.

rickfischer51 · Jan 10, 2021

Thanks for the reply. Thats the CONTA174 page in the MAPDL Theory Manual. The contact element seems to work, except that it doesnt match a run with an actual air gap. I was looking for a table of real world data for comparison.

Rick Fischer
Principal Engineer
Argonne National Laboratory

hacksaw · Jan 22, 2021

are you dealing with magnetic coatings or bulk laminates

hacksaw · Apr 9, 2021

Apparently good enough for 4-Sigma experiment!

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Contact permeance coefficient

rickfischer51

Mechanical

MagMike

Materials

rickfischer51

Mechanical

hacksaw

Mechanical

hacksaw

Mechanical

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