.. _auto_material_specimen_generator_4enf:

*MATERIAL SPECIMEN GENERATOR — 4ENF MODE II FRACTURE COUPON*
============================================================

Generates an LS-DYNA 4ENF (4-point End-Notched Flexure) Mode II fracture coupon for adhesive Mode II calibration. The two material parameters SHRMAX and GCSHR are exposed as inputs so calibration sweeps can vary them without re-shipping the keyword deck. The rest of the deck is fixed.

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

Classification: **data**.

Tagged: ``adhesive``, ``calibration``, ``fracture``, ``keyword``, ``ls-dyna``, ``mat_169``, ``mat_arup_adhesive``, ``mode_ii``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Element Formulation
     - elform
     - scalar
     - 1
     - 
     - Solid element formulation for the primary adherend section (*SECTION_SOLID secid=1). Exposed as IELFORM in *PARAMETER (referenced as &ELFORM). Default 1 (constant-stress). The cohesive adhesive section is left unchanged.
   * - Duration
     - duration
     - scalar
     - 100.0
     - 
     - Termination time (*CONTROL_TERMINATION endtim). Exposed as RETERM in *PARAMETER (referenced as &ETERM).
   * - Force Multiplier
     - force_multiplier
     - scalar
     - 1.0
     - 
     - Scale factor for force output / load curve referencing (exposed as RFMULT in *PARAMETER, referenceable as &FMULT). Default 1.0.
   * - Material Data (Full *MAT Card Override)
     - material_data
     - textarea
     - —
     - 
     - Optional. When set, the entire *MAT_ARUP_ADHESIVE block is replaced verbatim with this text. Use to swap in a custom MAT card without editing the template.
   * - Additional Keywords
     - additional_keywords
     - textarea
     - —
     - 
     - Optional free-text LS-DYNA keywords appended after the deck and before *END.
   * - Title
     - title
     - scalar
     - Sample 4ENF Mode II coupon
     - 
     - Text that appears in the *TITLE block at the top of the generated keyword deck.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - material_specimen_generator_4enf_output_1
     - material_specimen_generator_4enf_output_1
     - text
     - Generated LS-DYNA keyword text for a 4ENF Mode II fracture coupon with the supplied shear-strength + Mode II fracture-energy parameters baked into the *PARAMETER block.

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

- cae.preprocessing.deck_authoring
- engineering.material.library
- engineering.material.specimen

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   Auto-generated from <code>transformation</code> schema. Worker id: <code>material_specimen_generator_4enf</code>. Schema hash: <code>dfbde8b0da1b</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>