MATERIAL SPECIMEN GENERATOR¶
Generates LS-DYNA keyword decks for biaxial punch (Nakazima-style) material specimens by parameterising geometry, mesh size, shell formulation, and boundary conditions. Use this worker to produce ready-to-run simulation input files for punch specimen coupon tests that feed material characterisation and failure-surface calibration workflows.
When to use¶
Classification: data.
Tagged: biaxial, coupon, deck, elform, gissmo, keyword, ls-dyna, mat_24.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Specimen Type | type | string | punch_20mmdia_specimen28mmdia | Punch/specimen geometry template to use (e.g. ‘punch_20mmdia_specimen28mmdia’); selects the pre-built LS-DYNA template file that defines punch diameter, specimen diameter, and mesh topology — default is ‘punch_20mmdia_specimen28mmdia’. | |
| Specimen Thickness | specimen_thickness | scalar | 1 | Shell element thickness of the specimen coupon in mm (scalar); controls the *SECTION_SHELL THICKNESS keyword entry — default is 1 mm. | |
| Elform | elform | scalar | 16 | LS-DYNA shell element formulation integer (e.g. 16 = fully-integrated shell); maps directly to the ELFORM field in *SECTION_SHELL — default is 16. | |
| NIP | ni_p | scalar | 3 | Number of Integration Points | |
| Mass-Scaled Time Step | mass-scaled_time_step | scalar | 0 | Mass scaling time step | |
| Membrane Thinning | membrane_thinning | scalar | 0 | *CONTROL_SHELL ISTUPD parameter | |
| V-A-D | velocity-acceleration-displacement | scalar | 2 | VAD Load Curve Type | |
| Loading Input | loading_input_type | scalar | constant | Load Curve is constant or varying based on Curve | |
| Displacement Or Velocity Or Acceleration Value | displacementor_velocityor_acceleration_value | scalar | 25 | Displacement Final value | |
| Duration | duration | scalar | 100 | CONTROL_TERMINATION | |
| Binary Output Frequency | binary_output_frequency | scalar | 1 | ||
| ASCII Output Frequency | ascii_output_frequency | scalar | 0.1 | ||
| Material ID | material_i_d | scalar | — | ||
| Material Data | material_data | text | — | Material Card | |
| IMFLAG | imfla_g | scalar | 0 | ||
| IMASS | imas_s | scalar | 0 | ||
| DT0 | d_t0 | scalar | 0.1 | ||
| ILIMIT | ilimi_t | scalar | 10 | ||
| MAXREF | maxre_f | scalar | 15 | ||
| IACC | iac_c | list | 0 | ||
| FS | f_s | scalar | 0 | Static Friction | |
| FD | f_d | scalar | 0 | Dynamic Friction | |
| Additional Keywords | additionalkeywords | text | — | Addition Keywords (Optional) | |
| Punch Diameter | punch_diameter | scalar | 0 | Punch diameter | |
| Specimen Diameter | specimen_diameter | scalar | 0 | Specimen diameter | |
| Lcint | lcint | scalar | 0 | Number of points to discretize the curves in *CONTROL_OUTPUT |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| material_specimen_generator_punch_output_1 | material_specimen_generator_punch_output_1 | text | Generated LS-DYNA keyword input deck (plain text / .k file) for the selected punch specimen geometry, ready for solver submission or downstream material calibration workflows. |
Disciplines¶
- cae.preprocessing.deck_authoring
- engineering.material.calibration
- engineering.material.characterization
- engineering.material.specimen
Auto-generated from transformation schema. Worker id: material_specimen_generator_punch. Schema hash: 4ce2dec706fa. Hand-curated docs in workerexamples/ override this page when present.