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This section describes the low level format for material properties. The actual formats are described under m_ functions m_elastic, m_piezo, ... For Graphical edition and standard scripts see section 4.2.1.
A material is normally defined as a row in the material property matrix pl. Such rows give a declaration of the general form [MatId Type Prop] with
| MatId | a positive integer identifying a particular material property. |
| Type | a positive real number built using calls of the form fe_mat('m_elastic','SI',subtype), the subtype integer is described in m_ functions. |
| Prop | as many properties (real numbers) as needed (see fe_mat, m_elastic for details). |
Additional information can be stored as an entry of type 'mat' in the model stack which has data stored in a structure with at least fields
| .name | Description of material |
| .pl | a single value giving the MatId of the corresponding row in the pl matrix |
| .unit | a two character string describing the unit system (see the fe_mat Unit and Convert commands). |
| .type | the name of the material function handling this particular type of material (for example m_elastic). |
