PROVIDES THE LS-DYNA RUNNABLE MODEL FOR FOAM COMPRESSION MODEL WORKER¶
Generates a ready-to-run LS-DYNA foam compression deck by rendering a Smarty template with user-supplied material and solver parameters. Use this worker to produce the keyword input file and companion JSON template for a foam coupon compression test (sphere or plate impactor).
When to use¶
Tagged: compression, coupon, dt2ms, dynamodel, elform, foam, foam_compression, impactor.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Title | title | textarea | Foam Compression Test | Free-text title written into the LS-DYNA keyword header; defaults to ‘Foam Compression Test’ and can be left as-is for batch runs. | |
| Material ID | material_id | textarea | 12 | Integer material ID (*MAT card MID) assigned to the foam part in the generated deck; defaults to 12 — change only when the ID must match an existing model numbering scheme. | |
| Material data | material_data | textarea | — | Raw LS-DYNA material keyword block (e.g., *MAT_LOW_DENSITY_FOAM card content) to be injected verbatim into the template; must be provided for a valid runnable model. | |
| Displacement Sf | disp_sf | textarea | -20 | Scale factor (mm, negative = compression) applied to the impactor prescribed displacement curve; default -20 mm gives ~20 mm of compression travel — adjust for thicker/thinner foam specimens. | |
| ELFORM | elform | textarea | -1 | LS-DYNA element formulation (ELFORM) for the foam solid elements; default -1 (mean-stress fully integrated) is recommended for foam to avoid hourglassing. | |
| Termination Time | term | textarea | 0.2 | Simulation termination time in seconds; default 0.2 s — reduce for faster quasi-static sweeps or increase if the prescribed displacement is slow. | |
| DT2MS | dt2ms | textarea | -1e-07 | Mass-scaling target timestep (DT2MS, seconds, negative = minimum timestep floor); default -1e-7 s — tighten toward 0 to reduce added mass, loosen to shorten wall-clock time. | |
| Impactor Type | impactor_type | select | sphere | Geometry of the compression impactor: ‘sphere’ (rigid spherical indenter contacting the foam surface) or ‘plate’ (rigid flat plate / prescribed motion on the top foam surface); select based on test fixture. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| Model | model | textarea | |
| Foam Model Template | foam_model_template | textarea | JSON template file that describes the parameter schema for the foam compression model, used by downstream workers for parameterised re-runs or DOE studies. |
Disciplines¶
- cae.preprocessing.deck_authoring
- engineering.crash.dynamics
- engineering.material.calibration
- engineering.material.specimen
Auto-generated from platform schema. Worker id: dynamodel_get_foam_compression. Schema hash: b02aa9937937. Hand-curated docs in workerexamples/ override this page when present.