.. _auto_curve_forcedeflectiontoengstressstrain_section:

*CONVERT A FORCE-DEFLECTION CURVE TO A ENGINEERING STRESS VS STRAIN CURVE BASED*
================================================================================

Converts a force-deflection (force-displacement) curve into an engineering stress vs. strain curve using the specimen's gauge-section geometry. Supports rectangular and circular cross-sections; stress is computed as force divided by initial cross-sectional area and strain as deflection divided by gauge length.

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

Classification: **process**.

Tagged: ``circular``, ``coupon``, ``cross-section``, ``curve-transform``, ``engineering-strain``, ``engineering-stress``, ``force-deflection``, ``gauge-section``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Force Deflection Curve
     - forcedeflectioncurve
     - vector
     - —
     - 
     - Input force-displacement curve (X = displacement/deflection, Y = force) measured from the coupon test; must be provided as a two-column vector before any cross-section conversion is applied.
   * - Section Type
     - sectiontype
     - scalar
     - rectangle
     - 
     - Cross-section shape of the specimen at the gauge region — 'rectangle' (default) for flat/sheet specimens or 'circular' for round-bar specimens; determines how the cross-sectional area is calculated.
   * - Length
     - length
     - float
     - 1.0
     - 
     - Gauge length of the specimen (scalar, same length units as the deflection axis of the input curve; default 1.0); used as the denominator when computing engineering strain.
   * - Width Or Radius
     - widthorradius
     - float
     - 1.0
     - 
     - Width of the specimen (for rectangular sections) or radius (for circular sections) at the gauge, in the same length units as gauge length (default 1.0); used to compute the initial cross-sectional area.
   * - Thickness
     - thickness
     - float
     - 1.0
     - 
     - Thickness of the specimen at the gauge, in the same length units as gauge length (default 1.0); used only for rectangular cross-sections to complete the area calculation (width × thickness).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_forcedeflectiontoengstressstrain_section_output_1
     - curve_forcedeflectiontoengstressstrain_section_output_1
     - vector
     - Resulting engineering stress vs. engineering strain curve (X = engineering strain [dimensionless], Y = engineering stress [force/area units consistent with inputs]), ready for downstream material characterization or calibration workers.

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

- data.curve.transform
- 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_forcedeflectiontoengstressstrain_section <https://www.d3view.com/api/workflow/example?id=curve_forcedeflectiontoengstressstrain_section>`_

.. 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_forcedeflectiontoengstressstrain_section</code>. Schema hash: <code>f4dbbd9ce635</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>