COMPUTE LANKFORD COEFFICIENT¶
Computes the Lankford coefficient (r-value) from longitudinal and transverse strain curves measured during a uniaxial tensile test. The r-value quantifies plastic anisotropy and is a key input for sheet-metal forming simulations. Use this worker when characterizing material directionality from coupon test data.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Longitudinal Strain Curve | longitudinal_strain_curve | vector | — | True longitudinal (axial) strain vs. time or displacement curve from a uniaxial tensile coupon test, supplied as an (x, y) vector; must be co-registered with the transverse strain curve. | |
| Transverse Strain Curve | transverse_strain_curve | vector | — | True transverse (width) strain vs. time or displacement curve from the same tensile coupon test, supplied as an (x, y) vector; used together with the longitudinal strain curve to compute the r-value ratio. | |
| Number Of Digitized Points | numberofdigitizedpoints | scalar | — | Integer number of evenly-spaced points used to re-digitize / resample both strain curves before the r-value calculation; leave as default (null) to use the raw curve resolution. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| curve_lankford_coefficient_output_1 | curve_lankford_coefficient_output_1 | vector | Lankford coefficient (r-value) curve — typically r plotted as a function of strain level — returned as an (x, y) vector for downstream material calibration or reporting. |
Disciplines¶
- data.curve.pair
- engineering.manufacturing
- 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=curve_lankford_coefficient
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