MATERIAL SPECIMEN GENERATOR — TDCB MODE I FRACTURE COUPON¶
Generates an LS-DYNA TDCB (Tapered Double Cantilever Beam) Mode I fracture coupon for adhesive Mode I calibration (industry-standard ASTM D3433-style geometry). The two material parameters TENMAX and GCTEN are exposed as inputs so calibration sweeps can vary them without re-shipping the keyword deck. The rest of the deck (mesh, elements, contacts, controls, boundary conditions) is fixed.
When to use¶
Classification: data.
Tagged: adhesive, calibration, fracture, keyword, ls-dyna, mat_169, mat_arup_adhesive, mode_i.
Inputs¶
| 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 | 800.0 | 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). Use for unit conversion (e.g. 0.001 to report kN instead of N) or to combine with per-specimen-count assemblies. 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 fully custom MAT card (e.g. *MAT_COHESIVE_MIXED_MODE_ELASTOPLASTIC_RATE) without editing the template. When empty (default), the templated *MAT_ARUP_ADHESIVE block built from rtenmax / rgcten / shrmax / gcshr is rendered. | |
| Additional Keywords | additional_keywords | textarea | — | Optional free-text LS-DYNA keywords (e.g. *COMMENT, extra *DEFINE_CURVE blocks, custom *SET_NODE definitions) appended after the standard deck and before the terminating *END card. | |
| Title | title | scalar | Sample TDCB Mode I coupon | Text that appears in the *TITLE block at the top of the generated keyword deck. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| material_specimen_generator_tdcb_output_1 | material_specimen_generator_tdcb_output_1 | text | Generated LS-DYNA keyword text for a TDCB Mode I fracture coupon with the supplied tensile-strength + Mode I fracture-energy parameters baked into the *PARAMETER block. Drop into the simulation deck as-is. |
Disciplines¶
- cae.preprocessing.deck_authoring
- engineering.material.library
- engineering.material.specimen
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