Experimental and Numerical Investigation of Residual Stresses in Shot Peened Flange Pin of Landing Gears
Bibliographic record
Abstract
Flange pin is a landing gear component, manufactured by Safran, which is made of high strength low alloy HY-TUF steel.It is conventionally peened with steel shots to improve its fatigue life, but recently Safran has proposed to substitute ZirShot-ZC600 ceramic shot for steel shot owing to the high reusability of ceramic shot.In this research, the residual stresses in the flange pin peened with ceramic shots are investigated experimentally with X-ray diffraction (XRD) technique and numerically via finite element analysis (FEA) using Abaqus package.The experimental data show that at the surface of the peened flange pin the residual stresses in longitudinal and circumferential direction of the flange pin are all compressive, with the latter much greater than the former in magnitude.Three-dimensional FEA models are created for simulating the flange pin surface peened by ceramic shot flow which is generated randomly using the MATLAB program.It is
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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 | 0.001 |
| 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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".