Material property matrices

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7.3 Material property matrices

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 5.3.1.

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).