Machined core not as strong as simulations
Machined core not as strong as simulations
(OP)
Hello,
I had simulated a core (low carbon steel 1008) wound with Cu wire in Ansys magnetostatics. An armature (permanent magnet in this case) placed in a gap of the core was simulated to calculate forces.
However the force I am getting from an actual machined 1010 steel core is significantly less (more than factor of 2).
Why is this happening? Is this due to stress formed by machining that could be affecting the grain structure? Should I look into annealing/plating with high permeability mat? please help !
I had simulated a core (low carbon steel 1008) wound with Cu wire in Ansys magnetostatics. An armature (permanent magnet in this case) placed in a gap of the core was simulated to calculate forces.
However the force I am getting from an actual machined 1010 steel core is significantly less (more than factor of 2).
Why is this happening? Is this due to stress formed by machining that could be affecting the grain structure? Should I look into annealing/plating with high permeability mat? please help !





RE: Machined core not as strong as simulations
TTFN
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RE: Machined core not as strong as simulations
RE: Machined core not as strong as simulations
However - You should also check your model. What is the material curve for the 1008 like? Perhaps you have something unrealistic there. Secondarily, what is the cooling on your coil like? Heating of the wires could also be part of the problem. Lastly, what sort of magnet did you model and what did you use?
I realize these are all measurement-model agreement questions that you would ask for every problem, but given the short first post, I gotta ask.
RE: Machined core not as strong as simulations
Is everything in the as-built structure IDENTICAL to the simulation?
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Machined core not as strong as simulations
I use MagNet in conjunction with a material properties database I have built up over the years. It is usually within about 10% of measurements but always high. Everything is always perfect in a simulation, real parts have imperfections.
RE: Machined core not as strong as simulations
Adjust the material properties of the 1008 in Ansys until it matches your readings. This will help partially validate your model. After this, re-run the model with the armature.
BTW: You mentioned your armature is a permanent magnet. If it is Alnico or Hard Ferrite, there is a chance it became slightly demagnetized.