.. _auto_doe_preprocessing_worker:

*DOE PREPROCESSING WORKER*
==========================

Applies pre-processing transformations to a DOE experiment table prior to simulation runs; currently supports Cockcroft-Latham damage curve generation, which derives a damage curve from a hardening curve and tensile failure strain for each simulation in the dataset. Use this worker when DOE experiment configurations require material damage pre-processing before solver submission.

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

Tagged: ``cockcroft_latham``, ``damage_curve``, ``doe``, ``doe_preprocessing``, ``hardening_curve``, ``material_failure``, ``preprocessing``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Experiments
     - doe_experiments
     - dataset
     - —
     - ✓
     - Dataset table of DOE experiment rows, each representing one simulation configuration; must contain at least the simulation ID column and the tensile failure strain column referenced in preprocessing_params.
   * - Simulation Column Id
     - sim_id_column
     - scalar
     - id
     - ✓
     - Name of the column in doe_experiments that holds the simulation identifier used to look up each simulation record; defaults to 'id'.
   * - Pre-processing Type
     - pre_processing_type
     - scalar
     - cockcroft_latham_damage
     - ✓
     - Selects the pre-processing algorithm to apply; currently the only supported value is 'cockcroft_latham_damage', which computes a Cockcroft-Latham damage curve for each simulation.
   * - Preprocessing parameters
     - preprocessing_params
     - textarea
     - —
     - 
     - Key-value map (textarea) supplying algorithm-specific parameters; for 'cockcroft_latham_damage' the required keys are tensile_failure_column (column name in doe_experiments), hardening_curve_id (curve ID to retrieve from the simulation), and damage_curve_id (curve ID to replace in the simulation).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Simulations
     - pre_processed_info
     - dataset
     - Dataset of pre-processed simulation records, each containing the simulation ID, tensile failure strain, the original hardening curve, and the newly computed damage curve; consumed by downstream solver or DOE evaluation workers.

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

- ai_ml.preprocessing
- design_exploration.doe
- engineering.material.calibration
- engineering.material.failure

.. raw:: html

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   <p style="font-size:11px;color:#888">
   Auto-generated from <code>platform</code> schema. Worker id: <code>doe_preprocessing_worker</code>. Schema hash: <code>20941d617aae</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>