.. _auto_curve_engstress_yield:

*COMPUTE YIELD POINT OF ENG STRESS STRAIN CURVE*
================================================

Computes the yield point of an engineering stress-strain curve using the 0.2% offset method (or a user-specified offset). The worker draws an offset line with the given elastic modulus slope and returns the intersection with the curve as the yield point.

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

Classification: **process**.

Tagged: ``0.2%_offset``, ``engineering_stress_strain``, ``material_characterization``, ``offset_method``, ``stress_strain``, ``yield_point``, ``yield_stress``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Eng Stress Strain Curve
     - engstressstraincurve
     - vector
     - —
     - 
     - Engineering stress-strain curve (stress in MPa or consistent units vs. dimensionless strain) from which the yield point will be determined; provided as an XY vector pair.
   * - Elastic Modulus
     - elastic_modulus
     - scalar
     - 0
     - 
     - Elastic (Young's) modulus used as the slope of the offset line (same stress units as the curve, e.g. MPa); defaults to 210000 MPa (steel) when set to 0.
   * - Yield Offset
     - yield_offset
     - scalar
     - 0.002
     - 
     - Strain offset applied to the elastic line for the offset yield method (dimensionless); default is 0.002, corresponding to the standard 0.2% offset rule.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_engstress_yield_output_1
     - curve_engstress_yield_output_1
     - vector
     - Yield point result returned as an XY curve (or scalar pair) representing the intersection of the offset line with the engineering stress-strain curve; format depends on the internal return_type setting (defaults to 'curve').

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

- data.curve.transform
- engineering.material.characterization

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

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_engstress_yield</code>. Schema hash: <code>02e5db192374</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>