Fatigue strength of vibration‐welded unreinforced nylon butt joints
Bibliographic record
Abstract
Abstract The fatigue properties of vibration‐welded butt joints in two thermoplastics, nylon 6 and nylon 6,6, are examined in this work. Injection molded plaques were welded under high and low pressure conditions at 212 Hz and at an amplitude of 1.8 mm to a weld penetration of 1.5 mm. Dog‐bone coupons were machined from welded and unwelded plaques and then fatigue cycled in load control at a stress ratio of R = 0.1. The test frequency ranged from 1 to 10 Hz to avoid hysteretic heating. When the temperature rise in the weld region during testing was insignificant, no physical thermal damage was observed. It was found that the nonwelded specimens have longer fatigue lives than the welded ones, while the welded specimens appear to have similar fatigue behavior, except for nylon 6 welded in high pressure, which was slightly inferior. Vibration welding of these materials appears to be viable for structural applications requiring fatigue resistance. POLYM. ENG. SCI. 45:935–944, 2005. © 2005 Society of Plastics Engineers
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".