Propriedades mecânicas de tração e fadiga de chapa fina de um aço livre de intersticiais
Bibliographic record
Abstract
In the present work, the monotonic and low cyc1efatigue properties of thin sheet of interstitial free steel containing titanium additions, used in the automotive industry, were investigated.Fatigue tests were conducted under deformation control (R;=-1) using a grip alignrnent fixture.The material exhibits different fatigue behavior for the transverse and longitudinal directions (in relation to the rolling direction).A comparison between the monotonic stress-strain curve and the cyc1ic stress-strain curve in the transverse direction showed that the material exhibits cyc1ichardening in alI strain amplitudes tested.The strain-life relationship obtained for transverse direction is given by 8.Et/2= O, O186(2Nfro,262 + 0,235(2Nf)-O,476 with transition point in 2Nt=1,4x105 reverses; buck1ing of longitudinal specimens made impossible to obtain such relationship.Several prediction methods of fatigue properties from monotonic properties were compared to the experimental results.The Four Point Correlation and the Modified Universal Slopes Methods showed a good correlation for the low cyc1eregion.Fractographic analysis through Scanning Eletronic Microscopy showed the presence of Stage 11striations, giving support to the high ductility of the material.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".