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# RE: [femm] Hysteresis

- To: <femm@yahoogroups.com>
- Subject: RE: [femm] Hysteresis
- From: "McGee" <mcgee@mcmillan-mcgee.com>
- Date: Tue, 10 Apr 2001 08:20:13 -0600
- Importance: Normal
- In-reply-to: <3AD30E9B.EE7CD937@foster-miller.com>

David
Using the approximate approach for modeling hysteresis that you have implemented in your model has worked for me in the past as a "history matching" parameter. As a predictive tool an approach using Preisach's Theory might be useful. I would like to take a stab at implementing hysteresis into your code. It would be tremendously beneficial to me (hysteresis losses in steel pipes) and I am sure others might find it useful. Have you looked at Preisach's Theory. I know several researchers have implemented this approach into FEM code, however I do not know the success of this approach. I used a time stepping approach around the BH loop as H varied with time; in FDTD this was a very direct approach. Any suggestions.
Bruce

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