GET RATIO OF NECKING STRESS BETWEEN THE TWO ENG. STRESS VS STRAIN CURVES¶
Computes the ratio of necking stress between two engineering stress-vs-strain curves (e.g., test vs. simulation). An optional peak-matching mode aligns the curves at the engineering peak or true necking point before computing ratios, including post-necking regions if requested.
When to use¶
Classification: process.
Tagged: curve_comparison, engineering_stress_strain, material_characterization, necking, necking_point, peak_match, stress_ratio.
Inputs¶
| Label | ID | Type | Default | Required | Description |
|---|---|---|---|---|---|
| Eng Stress vs Strain Curve 1 | eng_ss_1 | vector | — | First engineering stress vs. strain curve (e.g., physical test coupon result); accepts a single curve or the first curve of a CurveGroup; strain on x-axis (mm/mm), stress on y-axis (MPa). | |
| Eng Stress vs Strain Curve 2 | eng_ss_2 | vector | — | Second engineering stress vs. strain curve to compare against the first (e.g., simulation output); accepts a single curve or the first curve of a CurveGroup; must share the same axis units as eng_ss_1. | |
| Type of Peak Match | peak_match_type | select | none | Controls how the two curves are aligned before ratio computation: ‘none’ skips alignment, ‘eng_peak’ aligns at the first engineering stress peak, ‘true_necking_point’ aligns at the true necking point (intersection of true stress and its derivative), ‘eng_peak_post_neck’ also matches post-necking region from the engineering peak, and ‘true_necking_post_neck’ also matches the post-necking region from the true necking point; defaults to ‘none’. |
Outputs¶
| Label | ID | Type | Description |
|---|---|---|---|
| Ratios | ratio | keyvalue | Key-value map of computed necking stress ratios between the two curves (e.g., ratio at peak, at necking point), reflecting the selected peak_match_type alignment strategy. |
Disciplines¶
- data.correlation
- data.curve.pair
- engineering.material.characterization
Runnable example¶
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