GISSMO BUILD LCREGD REGULARIZATION CURVE¶
Build a GISSMO LCREGD mesh-size regularization curve (dimensionless factor vs element size mm), normalized to 1.0 at the reference element size. Empirical path fits factor=eps_f(L)/eps_f_ref through 2-3 mesh-size calibration points; the Hillerborg 1/L fallback is a rough constant-fracture-energy approximation for when no multi-mesh data exists.
When to use¶
Tagged: gissmo, lcregd, regularization, mesh, failure_strain, fracture, materials.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Calibrated Failure Strain | failure_strain_calibrated | text | — | eps_f (equivalent plastic strain to fracture) measured at the reference element size. Dimensionless, > 0. | |
| Reference Element Size (mm) | reference_element_size | text | — | Element size (mm) at which eps_f was measured. The curve is normalized to factor=1.0 at this size. > 0. | |
| Mesh Calibration Points (JSON) | mesh_calibration_points | text | — | JSON array of {“element_size”: mm, “failure_strain”: eps_f} from coupon runs at 2-3 different mesh sizes. Required for the empirical path. Do NOT include the reference point (implicit at factor=1.0). | |
| Use Hillerborg 1/L Fallback | fracture_energy_method | text | no | ‘no’ (default) = empirical fit through the calibration points (recommended). ‘yes’ = analytic 1/L fallback (rough approximation; use only when no calibration data exists). | |
| Fallback Output Points | n_output_points | text | 20 | Number of log-spaced points in the output curve (Hillerborg fallback path only; the empirical path uses the calibration points directly). |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| LCREGD Result | lcregd_result | keyvalue | Assoc result: lcregd_curve [[length_mm, factor], …], reference_element_size, method (‘empirical’/’hillerborg_fallback’), normalization_check, validation_note, and (fallback) warning. On bad input, an ‘error’ key. |
Disciplines¶
- engineering.material.calibration
- engineering.crash.dynamics
- cae.preprocessing.deck_authoring
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