COMPUTES KEY VALUES SUCH AS YIELD, NECKING ETC.¶
Computes key statistical properties from engineering stress-strain curves, including Yield Stress (0.2 % offset or alternative methods), Necking point, Ultimate Tensile Strength, and Fracture values. Use this worker to characterise coupon test data before material calibration or library ingestion.
When to use¶
Classification: process.
Tagged: UTS, coupon, engstress, fracture, material_characterization, necking, offset_method, slip_correction.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Eng Stress Strain Curves | eng_stress_strain_curves | vector | — | One or more engineering stress-strain curves (stress in MPa, strain dimensionless) obtained from coupon tests; accepts multiple curves for batch processing. | |
| Slope | slope | scalar | 210 | Young’s Modulus in GPa used to fit the initial linear region and locate the offset line; default 210 GPa (steel) — set to 0 to let the worker auto-detect the best-fit initial slope. | |
| Yield Offset | yield_offset | scalar | 0.002 | Strain offset for the 0.2 % offset yield criterion (dimensionless); default 0.002 — increase for thermoplastics or materials with a gradual elastic-to-plastic transition. | |
| True Intersection Type | true_intersection_type | list | xlast | Selects which intersection point between the true stress-strain curve and its derivative is used to identify the necking onset: ‘xlast’ (default, most conservative), ‘xfirst’, or ‘xavg’. | |
| Treat Mechanical Slip | treat_slip | list | no | When set to ‘yes’, mechanical slip or grip-seating offset is detected and removed from the curve before computing statistics; default ‘no’. | |
| Remove Failure | remove_failure | list | no | When set to ‘yes’, the post-fracture load-drop region is stripped from the curve before statistics are computed; default ‘no’. | |
| Yield Type | yield_type | list | offset | Type of yield determiniation. By default it uses offset of the line parallel to the slope. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| curves_engstress_stats_output_1 | curves_engstress_stats_output_1 | dataset | Dataset (tabular) containing per-curve key-value statistics — Yield Stress, Yield Strain, UTS, Necking Stress/Strain, Fracture Stress/Strain, and Young’s Modulus — one row per input curve. |
Disciplines¶
- data.statistics
- engineering.material.characterization
- engineering.material.specimen
Runnable example¶
A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: /api/workflow/example?id=curves_engstress_stats
Auto-generated from transformation schema. Worker id: curves_engstress_stats. Schema hash: 0603b85a38dc. Hand-curated docs in workerexamples/ override this page when present.