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Calculating torque of an axial PM magnetic coupling?

Calculating torque of an axial PM magnetic coupling?

Calculating torque of an axial PM magnetic coupling?

(OP)
Hi folks, long time lurker on here. Needing a bit of help calculating the torque and attraction force of an axial permanent magnetic coupling in Abaqus. I understand that there are more suitable softwares for this, but I'm working on a budget and only have access to Abaqus CAE.

I am trying to model a coupling which uses 6 magnets per disk, arranged in N-S-N. The magnets themselves are bonded neodymium with a magnetic permeability of 1.05 and a Br of 0.4T. They are 10mm in diameter and thickness. I have modelled them as two disks of 6 sections. The gap between the disks is 5mm.

I modelled it in Abaqus as a Standard/Explicit model and a Dynamic/Implicit step. The disks are bound to allow no translation, only rotation. I have tried to create the magnetic force using both face and body magnetic forces, but it aborts with errors. I am having troubles getting the program to complete jobs, as it is my first time using the program with magnetic forces. I think the problem lies either with the material properties being incorrect (it asks for piezoelectric properties, which I don't have to hand), or the forces being used incorrectly, but I am not sure.
Pic for example is below:

Link

I understand that there are other pieces of software which would do the job far easier, such as ANSYS Maxwell, but I don't have access at work. Any help would be great.

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