.. _auto_curves_requires_mesh_regularization:

*EVALUATES THE SLOPE OF ALL CURVES TO DETERMINE IF MESH-REGULARIZATION IS REQUIRED*
===================================================================================

Evaluates the slope (or derivative intersection) of one or more stress-strain curves to determine whether mesh regularization is required for material softening/localization. Returns a dataset flagging each curve that exhibits a slope below the configured threshold, indicating potential strain localization.

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

Classification: **process**.

Tagged: ``derivative``, ``intersection``, ``localization``, ``material``, ``mesh_regularization``, ``regularization_check``, ``slope``, ``strain``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve 1
     - curve1
     - vector
     - —
     - 
     - One or more stress-strain (or force-displacement) curves to be evaluated; accepts multiple vector inputs representing individual coupon or simulation curves.
   * - Factor to use while computing the end value
     - end_r
     - scalar
     - 0.2
     - 
     - Fraction (0–1) of the curve's maximum x-value used to define the 'end' region for slope computation; default 0.2 means the last 20% of the curve range is used.
   * - Threshold
     - threshold
     - scale
     - 0.05
     - 
     - Dimensionless multiplier applied to the average slope; if the computed end-region slope falls below (threshold × average slope), the curve is flagged as requiring mesh regularization — default 0.05.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Needs Mesh Regularization
     - curves_req_regularize
     - dataset
     - Tabular dataset listing each input curve with a flag (and supporting metrics such as computed slope and threshold) indicating whether mesh regularization is required for that curve.

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

- data.curve.transform
- data.signal_processing
- engineering.material.calibration
- engineering.material.characterization
- engineering.material.failure

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=curves_requires_mesh_regularization <https://www.d3view.com/api/workflow/example?id=curves_requires_mesh_regularization>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_requires_mesh_regularization</code>. Schema hash: <code>6e7598cad66d</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>