.. _auto_curves_stress_to_triaxiality:

*CONVERT STRESS-TENSOR TO TIAXIALITY USING VON-MISES STRESS AND HYDROSTATIC PRESSURE*
=====================================================================================

Converts a set of stress-tensor component curves (σ_x, σ_y, σ_z, τ_xy, τ_yz, τ_zx) into a derived scalar quantity using von Mises stress and hydrostatic pressure. Supports three output modes: triaxiality (η = p / σ_vm), hydrostatic pressure, or von Mises stress. Use this worker to prepare stress-state indicators needed for material failure and GISSMO calibration workflows.

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

Classification: **process**.

Tagged: ``GISSMO``, ``curves``, ``failure``, ``hydrostatic_pressure``, ``stress_state``, ``stress_tensor``, ``triaxiality``, ``von_mises``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve 1
     - stresscomponents
     - vector
     - —
     - 
     - Time-history curves of the six independent stress-tensor components in order σ_x, σ_y, σ_z, τ_xy, τ_yz, τ_zx (vector/curve format); multiple element or integration-point curves may be supplied simultaneously.
   * - Return Type
     - return_type
     - list
     - triax
     - 
     - Selects the scalar quantity to compute and return: 'triax' (triaxiality η = hydrostatic pressure / von Mises stress, default), 'pressure' (hydrostatic pressure p), or 'von-mises' (von Mises equivalent stress σ_vm).

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - curves_stress_to_triaxiality_output_1
     - curves_stress_to_triaxiality_output_1
     - vector
     - Output curve(s) containing the computed scalar quantity (triaxiality, hydrostatic pressure, or von Mises stress) as a function of time, one curve per input stress-tensor set.

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

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

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

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

.. raw:: html

   <hr style="margin-top:2em">
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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curves_stress_to_triaxiality</code>. Schema hash: <code>1c615527d1b2</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>