Vibration Welding Nylon 66 - Part I Experimental Study
Bibliographic record
Abstract
The strengths and failure mechanisms of vibration welded joints were studied using a central composite design of experiment. The experimental study focused on three aspects: material, joint geometry and welding process effects. Butt joints, T-joints and cup-plaque joints were made using unreinforced nylon 66 and 33% short glass fiber reinforced nylon 66. Reinforced nylon 66 exhibited lower butt and T-joint strengths than unreinforced nylon 66. Analyses of the fracture surface suggest that the lower strength for the reinforced compound is related to glass fiber bundling and orientation effects. Weld pressure appears to play the largest role in determining joint strength; lower pressure results in higher strengths. Although the nominal tensile stress on these joint geometries has been shown to be a useful screening tool, a more detailed mechanical analysis is required to understand the complex stress field existing in T- and cup-plaque joints. Such an analysis should allow a better design of real joints on industrial parts.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.001 |
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".