Material data files

Material Functions and Material Data Files

To define material properties:

• either use functions from m6 material file (only a subset of all options is supported, see below)
• use built-in functions from Material class, in this case the material reference in the project file must have the name: built-in:<nr>

Example:

<!--List of all materials used in this construction-->
<Materials>
	<MaterialReference name="My material">built-in:2</MaterialReference>
</Materials>

This will make the solver use the built-in material data set with index 2 (see Material class).

Subset of material data used in OpenHAM

OpenHAM supports a subset of the material functions used in DELPHIN when providing material data files.

Moisture-tight materials have to be flagged as such by VAPOR_TIGHT or WATER_TIGHT flags (see material model).

Required parameters:

• LAMBDA_DRY
• CET
• RHO

Functions:

• moisture retention function thetal(pc) as spline
• liquid conductivity lgKl(thetal) as spline
• vapour permeability lgKv(thetal) as spline or parameter MEW

See also description of the material model.