.. _auto_lsdyna_connections_dr:

*LSDYNA CONNECTIONS — DEMAND RATIO PER SPOTWELD / CONTACT*
==========================================================

Composes Time Analysis Segments output for swforc / rcforc / nodfor / deforc and computes peak Demand Ratio = peak_force / ultimate_force per connection. Pass / Warn / Fail status against the configured ultimate thresholds. Powers the Root Cause Analyzer's connections-tool.

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

Tagged: ``connections``, ``DR``, ``demand_ratio``, ``spotweld``, ``contact``, ``nodfor``, ``deforc``, ``lsdyna``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Simulation
     - simulation_id
     - remote_lookup
     - —
     - 
     - Reference to the LS-DYNA simulation.
   * - Spotweld ultimate (kN)
     - spotweld_ultimate_kN
     - float
     - 38
     - 
     - Ultimate axial force used as the spotweld DR denominator.
   * - Contact ultimate (kN)
     - contact_ultimate_kN
     - float
     - 50
     - 
     - Ultimate normal force used as the contact / nodfor DR denominator.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - Connections
     - connections
     - dataset
     - { items: [{ connection_id, name, branch, peak_force, unit, ultimate_force, peak_DR, status }], count, note }

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

- cae.postprocessing.extraction
- engineering.structural.connection_analysis

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   Auto-generated from <code>platform</code> schema. Worker id: <code>lsdyna_connections_dr</code>. Schema hash: <code>8def5f2d851e</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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