COMPUTE SCALES USING THE STANDARD VARIANCE OF YIELD, ULTIMATE AND FAILURE STRESS¶
Computes effective variance-based scale factors for a quasi-static stress–strain curve by deriving min/max deviation scales at the yield, ultimate, and failure stress points. Given user-supplied fractional tolerances for each stress/strain landmark and the elastic modulus slope, it returns a key-value set of scale parameters suitable for downstream material scatter or stochastic analysis.
When to use¶
Classification: process.
Tagged: effective_stress_strain, failure_stress, material_calibration, quasi_static, scatter, stochastic, ultimate_stress, variance_scales.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Quasi-Static Effective Stress Strain Curve | quasi-static_effective_stress_strain_curve | vector | — | The reference quasi-static effective (true) stress–strain curve (vector of [strain, stress] pairs) from which yield, ultimate, and failure landmarks are extracted; leave unconnected only if landmark stresses are fully overridden externally. | |
| QS Yield Stress Min | qs_yield_stress_min | scalar | -0.05 | Lower fractional tolerance on quasi-static yield stress (e.g., -0.05 = −5 %); used to define the minimum yield-stress scale factor; default −0.05. | |
| QS Yield Stress Max | qs_yield_stress_max | scalar | -0.05 | Upper fractional tolerance on quasi-static yield stress (e.g., +0.05 = +5 %); used to define the maximum yield-stress scale factor; default −0.05 (override to a positive value in practice). | |
| QS Ultimate Stress Min | qs_ultimate_stress_min | scalar | -0.05 | Lower fractional tolerance on quasi-static ultimate (UTS) stress; sets the minimum UTS scale factor; default −0.05. | |
| QS Ultimate Stress Max | qs_ultimate_stress_max | scalar | -0.05 | Upper fractional tolerance on quasi-static ultimate (UTS) stress; sets the maximum UTS scale factor; default −0.05 (override to a positive value in practice). | |
| QS Elongation Strain Min | qs_elongation_strain_min | scalar | -0.05 | Lower fractional tolerance on quasi-static elongation (failure) strain; sets the minimum failure-strain scale factor; default −0.05. | |
| QS Elongation Strain Max | qs_elongation_strain_max | scalar | -0.05 | Upper fractional tolerance on quasi-static elongation (failure) strain; sets the maximum failure-strain scale factor; default −0.05 (override to a positive value in practice). | |
| Elastic Modulus | elastic_modulus | scalar | 210 | Young’s modulus (GPa) of the material, used to compute the elastic slope when projecting scale deviations back onto the curve; default 210 GPa (steel). | |
| Yield Offset | yield_offset | scalar | 0.002 |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| curve_eff_variance_scales_output_1 | curve_eff_variance_scales_output_1 | keyvalue | Key-value list of computed variance scale factors (one entry per landmark × bound combination, e.g., ‘yield_min’, ‘yield_max’, ‘ultimate_min’, ‘ultimate_max’, ‘failure_min’, ‘failure_max’), expressed as dimensionless multipliers ready for use in stochastic or scatter-band workflows. |
Disciplines¶
- data.curve.transform
- design_exploration.reliability
- engineering.material.calibration
- 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_effective_variance_scales
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