.. _auto_curve_forcedeflectiontoengstressstrain:

*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 by dividing force by the original cross-sectional area and displacement by the original gage length. Use this worker when processing uniaxial coupon test data to produce the standard engineering stress-strain representation needed for material characterization workflows.

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

Classification: **process**.

Tagged: ``coupon``, ``curve-conversion``, ``engineering-stress-strain``, ``force-deflection``, ``material-testing``, ``uniaxial``.

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, Y = force) obtained from a physical coupon test; units must be consistent with the length and area inputs (e.g., mm and N, or in and lbf).
   * - Length
     - length
     - float
     - 1
     - 
     - Original gage length of the specimen used to compute engineering strain (strain = deflection / length); must use the same length unit as the displacement axis of the input curve — defaults to 1 (dimensionless pass-through).
   * - Area
     - area
     - float
     - 1
     - 
     - Original cross-sectional area at the gage section used to compute engineering stress (stress = force / area); must use units consistent with force and desired stress units (e.g., mm² for MPa when force is in N) — defaults to 1 (dimensionless pass-through).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curve_forcedeflectiontoengstressstrain_output_1
     - curve_forcedeflectiontoengstressstrain_output_1
     - vector
     - Resulting engineering stress vs. strain curve (X = engineering strain [dimensionless], Y = engineering stress [force/area units]), ready for material characterization or calibration workflows.

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 <https://www.d3view.com/api/workflow/example?id=curve_forcedeflectiontoengstressstrain>`_

.. raw:: html

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   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_forcedeflectiontoengstressstrain</code>. Schema hash: <code>5e599336c8fd</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>