.. _auto_curve_clip_to_delay_failure:

*CLIP CURVE TO DELAY NEGATIVE Y-VALUE*
======================================

Clips a curve's trailing segment so that its extrapolated slope crosses y = 0 only after a specified multiple of the original x-maximum, effectively delaying the apparent failure point. The tail slope is refit using a percentage-based segment of the curve's last points. Use this worker to push a material or structural curve's zero-crossing further out in time/displacement without altering the early response.

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

Classification: **process**.

Tagged: ``clip``, ``curve``, ``failure_delay``, ``material_curve``, ``slope_adjustment``, ``tail_extrapolation``, ``zero_crossing``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Curve
     - curve
     - vector
     - —
     - 
     - Input curve (x-y vector) whose tail slope will be adjusted so that the y = 0 crossing is delayed; must be a standard d3VIEW curve vector — leave unconnected only if passing directly via workflow context.
   * - Segment Size In Terms Of Percentage Of Points
     - per_p
     - scalar
     - 0.05
     - 
     - Fraction of total curve points used to define the trailing segment for slope fitting (e.g., default 0.05 means the last 5% of points); increase for a smoother/more stable slope estimate, decrease to use only the very last portion.
   * - Max Limit
     - max_limit
     - scalar
     - 5
     - 
     - Multiplier on the original x-maximum beyond which the extrapolated y-value must become negative (default 5 means y < 0 is enforced beyond 5 × x_max); increase to delay failure further, decrease to allow an earlier crossing.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Clipped Curve
     - curve_clip_o
     - vector
     - Modified curve with the tail slope adjusted so that the zero-crossing is deferred to at least max_limit × x_max; all points up to the clip point are unchanged from the input curve.

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

- data.curve.transform
- engineering.crash.dynamics
- 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_clip_to_delay_failure <https://www.d3view.com/api/workflow/example?id=curve_clip_to_delay_failure>`_

.. raw:: html

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>curve_clip_to_delay_failure</code>. Schema hash: <code>70e9327fcac7</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>