CREATE A MAT_089 WITHOUT STRAIN RATES KEYWORD FOR LS-DYNA¶
Generates an LS-DYNA MAT_089 (*MAT_PLASTIC_POLYMER) keyword block without strain-rate dependency, assembling all required material parameters into a ready-to-use deck card. Use this worker when a rate-independent elasto-plastic polymer material definition is needed for an LS-DYNA simulation.
When to use¶
Classification: data.
Tagged: MAT_089, MAT_PLASTIC_POLYMER, elasto-plastic, keyword, ls-dyna, mat_89, material-card, no-strain-rate.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Material Name | material_name | scalar | — | Alphanumeric label for the material card (e.g. ‘PP_Bumper’); written into the MAT_089 header. Leave blank to omit a named header. | |
| Material ID | material_i_d | scalar | — | Integer LS-DYNA material ID (MID) used to reference this card in the deck; must be unique within the model. Leave blank to auto-assign. | |
| Curve Id | curve_id | scalar | — | Integer load-curve ID (LCID) referencing the pre-existing LS-DYNA *DEFINE_CURVE that defines the stress–plastic-strain hardening data; required when hardening_curve is not supplied directly. | |
| Density | density | scalar | — | Mass density of the material in consistent model units (e.g. kg/mm³ or tonne/mm³); maps to the RO field of MAT_089. | |
| Elastic Modulus | elastic_modulus | scalar | — | Young’s modulus (E) in consistent model pressure units (e.g. MPa or GPa); maps to the E field of MAT_089. | |
| Poissons Ratio | poissons_ratio | scalar | — | Poisson’s ratio (dimensionless, typically 0.3–0.45 for polymers); maps to the PR field of MAT_089. | |
| Hardening Curve | hardening_curve | vector | — | True stress vs. effective plastic strain curve supplied as an inline vector (pairs of strain, stress values); used directly when curve_id is not referenced from an existing deck curve. | |
| Failure Strain | failure_strain | scalar | — | Effective plastic strain at element erosion/failure (dimensionless); maps to the FAIL field of MAT_089. Omit or set to a large value to disable failure. | |
| Number Of Dig Points | numberof_dig_points | scalar | 200 | Number of Dig Points |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| dynakeyword_mat89_without_strain_rates_output_1 | dynakeyword_mat89_without_strain_rates_output_1 | text | Plain-text LS-DYNA keyword block containing the fully formatted *MAT_PLASTIC_POLYMER (MAT_089) card without strain-rate curves, ready for inclusion in a simulation deck. |
Disciplines¶
- cae.preprocessing.deck_authoring
- engineering.material.characterization
- engineering.material.library
Auto-generated from transformation schema. Worker id: dynakeyword_mat89_without_strain_rates. Schema hash: e0a2e87b95f0. Hand-curated docs in workerexamples/ override this page when present.