.. _auto_curve_has_localization:

*CHECKS FOR LOCALIZATION*
=========================

Detects the onset of plastic localization (necking) in a stress-strain curve. Accepts either engineering or true stress-strain input and returns a boolean scalar indicating whether localization has occurred. Use this worker to quality-check coupon test curves before material calibration.

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

Classification: **process**.

Tagged: ``coupon``, ``engineering_curve``, ``localization``, ``material_check``, ``necking``, ``stress_strain``, ``true_curve``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Engineering Stress Strain Curve
     - curve_in
     - vector
     - —
     - 
     - Engineering or true stress-strain curve (vector of strain–stress pairs) to be checked for localization onset; leave unconnected to test with a null curve.
   * - Type of Curve
     - curve_type
     - scalar
     - eng
     - 
     - Specifies whether the input curve is engineering stress-strain ('eng') or true stress-strain ('true'); defaults to 'eng' — change to 'true' only when a converted true-stress curve is supplied.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Has Localization
     - curve_has_output_1
     - scalar
     - Boolean scalar (1 = localization detected, 0 = not detected) indicating whether the supplied stress-strain curve exhibits a necking / localization instability.

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

- engineering.material.characterization
- engineering.material.specimen

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

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

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_has_localization</code>. Schema hash: <code>01c7863eecf2</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>