.. _auto_curves_equivalent_strain:

*COMPUTE THE EQUIVALENT STRAIN PLOT*
====================================

Computes the equivalent strain curve from two principal strain components (E1 and E2). Given E1 and E2 strain time-history vectors, it applies the equivalent-strain formula and returns the resulting combined strain curve. Use this worker when you need to derive a scalar equivalent strain signal from biaxial principal strain data.

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

Classification: **process**.

Tagged: ``biaxial``, ``curves``, ``e1``, ``e2``, ``equivalent_strain``, ``principal_strain``, ``strain_transformation``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - E1 Strain
     - e1strain
     - vector
     - —
     - 
     - First principal strain time-history (E1) as a curve vector or CurveGroup; if a CurveGroup is supplied, only the first curve is used. Optional — leave unset if E1 data is not available.
   * - E2 Strain
     - e2strain
     - vector
     - —
     - 
     - Second principal strain time-history (E2) as a curve vector or CurveGroup; if a CurveGroup is supplied, only the first curve is used. Optional — leave unset if E2 data is not available.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_equivalent_strain_output_1
     - curves_equivalent_strain_output_1
     - vector
     - Computed equivalent strain curve (dimensionless strain vs. time or index), derived from E1 and E2 using the equivalent-strain combination formula at the configured number of interpolation digits (default 100).

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

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

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_equivalent_strain</code>. Schema hash: <code>f4e028338426</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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