COMPUTES EFFECTIVE STRAIN AT DEVIATION¶
Computes the effective (true) strain at the point where a simulated engineering stress-strain curve first deviates significantly from a reference test curve. Use this worker to quantify the strain onset of divergence between simulation and physical test data, typically during material characterization or model validation.
When to use¶
Classification: process.
Tagged: curve_comparison, deviation, effective_strain, engineering_ss, material_characterization, sim_vs_test, stress_strain, yield.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Sim Eng SS | curve_1 | vector | — | Simulated engineering stress-strain curve (x = engineering strain, y = engineering stress in GPa or MPa); leave null if providing only a test curve for standalone yield analysis. | |
| Test Eng SS | curve_2 | vector | — | Experimental (physical test) engineering stress-strain curve (x = engineering strain, y = engineering stress, same units as curve_1); used as the reference against which simulation deviation is measured. | |
| Slope | slope | scalar | 210 | Elastic modulus (Young’s modulus) in GPa used to construct the offset yield line; defaults to 210 GPa (steel); set to 0.0 to let the worker compute it internally from the curve data. | |
| Yield Type | threshold | scalar | offset | Numeric value corresponding to the selected yield method (e.g. 0.0002 for 0.02 % offset, i.e. the standard 0.2 % proof-stress offset); adjust to match the material standard being applied. | |
| Yield Type Value | threshold | scalar | 0.0002 | Numeric value corresponding to the selected yield method (e.g. 0.0002 for 0.02 % offset, i.e. the standard 0.2 % proof-stress offset); adjust to match the material standard being applied. | |
| Compute the Deviation after this value | x_after | scalar | 0.0 | Strain value (engineering strain, dimensionless) below which data is ignored; any portion of the curve before this x-value is clipped before deviation is evaluated. Defaults to 0.0 (no clipping). | |
| Ratio of Max | percent_max | scalar | 0.05 | Fractional threshold of the maximum absolute difference between the two curves above which a divergence is classified as a deviation (e.g. 0.05 = 5 % of peak difference); lower values make detection more sensitive. | |
| Search from End | from_end | scalar | no |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| Eff Strain at Deviation | curve_get_eff_strain_at_deviation | scalar | Scalar effective (true) strain value at which the simulated stress-strain curve first deviates from the test curve beyond the specified percent_max threshold; dimensionless engineering strain units. |
Disciplines¶
- data.correlation
- data.curve.pair
- engineering.material.characterization
Runnable example¶
A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: /api/workflow/example?id=curve_get_eff_strain_at_deviation
Auto-generated from transformation schema. Worker id: curve_get_eff_strain_at_deviation. Schema hash: 63286350714e. Hand-curated docs in workerexamples/ override this page when present.