# Isotropic soft material : Iron sheets described by LS model

## Presentation

This model defines a nonlinear B(H) dependence for an isotropic material, from predefined sheets included in the software or from personal materials that the user can import by himself (see : LS model identification with MILS). During solving the behavior of this model is the same as an isotropic spline but in post processing for the computation of iron losses, Flux takes benefit of this dedicated model of dynamic hysteresis (LS model : Iron losses model), for which all the data to compute iron losses in the post-processing are already stored in the material description. The interest of this model is to have an accurate computation of iron losses in post-processing without getting the trouble of convergence and computation time of an hysteresis model during solving.

## Software aspects

- In the menu
**Physics**, click on**Materials** - In the B(H) properties choose :
**Iron sheets described by LS model** - The user can choose one of the predefined sheets
- The user can also import his own materials with its iron losses properties
(see :
__LS model identification with MILS__) - Assign materials to a
**Laminated non conducting region**Note: the thickness of the sheet must be the same in the material and in the region.

- M270-35A
- M330-35A
- M330-65A
- M400-50A
- M600-50A
- M600-65A
- M800-50A
- M800-65A

For more information about electrical steel sheets, see this page : Standards for electrical steel sheets

- In the menu
**Computation**, click on**Computation of iron losses** - Choose the
**Computation type** - Choose the
**Regions**and the computation**Interval** - Select the model
**Model defined in the material**

## Limitations

This model can be only applied on **Laminated non conducting region**.