CREATE A MAT_181 WITHOUT STRAIN RATES KEYWORD FOR LS-DYNA¶
Generates an LS-DYNA MAT_181 (*MAT_SIMPLIFIED_RUBBER/FOAM) keyword block without strain-rate dependency, using a single quasi-static stress–strain curve. Use this worker when authoring rubber or foam material cards that do not require rate-dependent behaviour.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Material Name | material_name | scalar | — | Alphanumeric label written into the LS-DYNA keyword header (e.g. ‘FOAM_PU_45’); leave null to omit a title comment. | |
| Material ID | material_i_d | scalar | — | Integer material ID (MID) assigned to the MAT_181 card; must be unique within the deck. | |
| Curve Id | curve_id | scalar | — | Integer load-curve ID (LCID) referencing the quasi-static stress–strain or force–displacement curve already defined in the deck. | |
| Density | density | scalar | — | Mass density of the material (ρ) in consistent units (e.g. kg/mm³ or t/mm³); used as the RO field in the keyword. | |
| Bulk Modulus | bulk_modulus | scalar | — | Bulk modulus (K) of the rubber/foam in consistent pressure units; controls volumetric stiffness in the MAT_181 card. | |
| Specimen Length | specimenlength | scalar | 1 | Gauge length of the physical test specimen (same units as the simulation model); used to normalise displacement to engineering strain. Default is 1 (dimensionless pass-through). | |
| Specimen Width | specimenwidth | scalar | 1 | Width of the physical test specimen; used together with thickness to compute cross-sectional area for stress normalisation. Default is 1. | |
| Specimen Thickness | specimenthickness | scalar | 1 | Thickness of the physical test specimen; combined with width to derive cross-sectional area for stress normalisation. Default is 1. | |
| Compression Tension Curve | compression_tension_curve | vector | — | Compression Tension Curve <a class=’btn btn-xs btn-default’ target=’_blank’ href=’https://www.d3view.com/docs/master/workflows/Glossary.html#curveinput’> <i class=’fa fa-external-link’> </i> View more </a> | |
| Poissons Ratio | poissons_ratio | scalar | 0.495 | ||
| Failure Parameter K | failureparameter_k | scalar | — | ||
| Failure Parameter Gamma1 | failureparameter_gamma1 | scalar | — | ||
| Failure Parameter Gamma2 | failureparameter_gamma2 | scalar | — | ||
| HU | h_u | scalar | — | ||
| Shape | shape | scalar | — | ||
| Number Of Dig Points | numberof_dig_points | scalar | 100 | Number of Dig Points |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| dynakeyword_mat181_without_strain_rates_output_1 | dynakeyword_mat181_without_strain_rates_output_1 | text | Plain-text LS-DYNA keyword block containing the fully populated *MAT_SIMPLIFIED_RUBBER/FOAM (MAT_181) card without strain-rate curves, ready to be inserted into a simulation deck. |
Disciplines¶
- cae.preprocessing.deck_authoring
- engineering.material.calibration
- engineering.material.library
Auto-generated from transformation schema. Worker id: dynakeyword_mat181_without_strain_rates. Schema hash: 81f57613a75b. Hand-curated docs in workerexamples/ override this page when present.