Hallo Dave, there is something that does not work as I expected in planar problems. Suppose that I have a square lamination with a central round hole. Through the hole there is a current. Lamination are angularly shifted of 45 degrees on the Z axis so as to obtain a star. Now, I set lamination fill factor to 1 for the octagon and 0.5 for the triangles, but it does not work: flux lines appear to be correct, but I expect that in triangular areas there is almost the same B as in the octagon since I have less iron. To bypass the problem I have two ways: 1- create a new material with a different B-H characteristic (one half of the original) so as to preserve the geometry and saturation, but with the wrong B 2- modify the geometry to preserve B and saturation Is this a bug or does fill factor work in a different way? Find attached the sample file. I also have another problem: As I told you, I have written my own class library to read, write, and workwith .fem and .ans files. My problem is that I can not get the correct result in calculation of torque from the stress tensor. The result that I get is wrong of 1e6 (probably due to some scale factor) plus 20-30% (it means that there is an error somewhere). I do the following: - find the edges over which the path lays - find the elements that share the edge and compute B as the mean of the B on the elements and H from permeability and B. - compute the torque on every edge of the path using the formula (26) of the manual - sum the results is there anything wrong on the above? Thank you. G.Bortolan
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