MATL* - Material Databases

MATL* - Material Databases

There is a maximum limit of 256 Material Databases. The entries in a oa_index file for a MATeriaL database MUST be formatted using 3 fields as follows.

• filename
• material name ( this will be used to automatically match the material in a model with a material in the database after it has been converted to upper case)
• Ansys LS-DYNA material model type ( without the *MAT_ prefix )

i.e

3
$
Filename
Material Name
LS_DYNA Material Type
$
steel_yield-200.key
   STEEL : YIELD 200 MPa
   PIECEWISE_LINEAR_PLASTICITY
$
steel_yield-250.key
   STEEL : YIELD 250 MPa
   PIECEWISE_LINEAR_PLASTICITY

Each data file should contain a single Ansys LS-DYNA material input card (in the KEYWORD format) along with any *DEFINE_CURVE and *DEFINE_TABLE definitions that are referenced by the material card. The material should be defined in the database file as material number 1 and any *DEFINE_CURVE and *DEFINE_TABLE cards should also be numbered sequentially from 1.

When a material is imported from a database file the following rules are used :

• If the file contains more than 1 material then only the material with the lowest material ID will be imported from the file.
• All *DEFINE_CURVE and *DEFINE_TABLE definitions will be imported .
• Any other Ansys LS-DYNA keyword data cards will be ignored.