.. _auto_dynakeyword_mat224:

*CREATE A MAT_224*
==================

Generates an LS-DYNA MAT_224 (Tabulated Johnson-Cook) keyword block from user-supplied material parameters and curve/table references. Use this worker to programmatically author rate- and temperature-dependent plasticity cards for crash and impact simulations.

When to use
-----------

Classification: **data**.

Tagged: ``-``, ``2``, ``4``, ``A``, ``D``, ``L``, ``M``, ``N``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Material Name
     - material_name
     - scalar
     - —
     - 
     - String label assigned to the MAT_224 card (e.g. 'DP980_MAT224'); purely informational and written into the keyword header.
   * - Material ID
     - material_i_d
     - scalar
     - —
     - 
     - Integer LS-DYNA material ID (*MAT MID field); must be unique within the deck — leave null to let the workflow assign one automatically.
   * - Starting Table ID
     - starting_table_i_d
     - scalar
     - —
     - 
     - Integer ID of the first *DEFINE_TABLE entry referenced by the card; subsequent tables are numbered incrementally from this value.
   * - Starting Curve Id
     - starting_curve_id
     - scalar
     - —
     - 
     - Integer ID of the first *DEFINE_CURVE entry referenced by the card; subsequent curves are numbered incrementally from this value.
   * - Density
     - density
     - scalar
     - —
     - 
     - Mass density of the material (RO field, units consistent with model — typically tonne/mm³ or kg/m³); required for valid dynamic simulations.
   * - Elastic Modulus
     - elastic_modulus
     - scalar
     - —
     - 
     - Young's modulus (E field, units consistent with model — e.g. GPa or MPa); governs the elastic response before yielding.
   * - Poissons Ratio
     - poissons_ratio
     - scalar
     - —
     - 
     - Poisson's ratio (PR field, dimensionless, typically 0.28–0.30 for steels); controls lateral strain during elastic deformation.
   * - CP
     - c_p
     - scalar
     - —
     - 
     - Specific heat capacity (CP field, energy per unit mass per degree — e.g. mJ/(tonne·K)); required when thermal softening tables are used.
   * - TR
     - t_r
     - scalar
     - —
     - 
     - Room / reference temperature (TR field, in model temperature units, e.g. K or °C); sets the baseline for Johnson-Cook thermal softening.
   * - BETA
     - bet_a
     - scalar
     - —
     - 
     - 
   * - NUMINT
     - numin_t
     - scalar
     - —
     - 
     - 
   * - LCK1
     - lc_k1
     - vector
     - —
     - 
     - LCK1   <a class='btn btn-xs btn-default' target='_blank' href='https://www.d3view.com/docs/master/workflows/Glossary.html#curveinput'> <i class='fa fa-external-link'> </i> View more </a>
   * - Strain Rates
     - strain_rates
     - scalar
     - —
     - 
     - 
   * - NDIG
     - ndi_g
     - scalar
     - 200
     - 
     - 

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - dynakeyword_mat224_output_1
     - dynakeyword_mat224_output_1
     - text
     - Plain-text LS-DYNA keyword block containing the fully assembled *MAT_224 card (and any companion *DEFINE_TABLE / *DEFINE_CURVE entries), ready to be included or appended to a simulation deck.

Disciplines
-----------

- cae.preprocessing.deck_authoring
- engineering.crash.dynamics
- engineering.material.calibration
- engineering.material.library

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>dynakeyword_mat224</code>. Schema hash: <code>5b905fd6c041</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>