Low-Velocity Impact Response of a Continuous Glass Fiber/Polypropylene Composite
Bibliographic record
Abstract
Low-velocity impact behavior of a continuous glass fiber/polypropylene composite molded in a [0/90]2s stacking configuration has been investigated. Optical microscopy and ultrasonic scanning were used to evaluate the impact-induced damage. The predominant damage mechanisms were found to be matrix cracking, delamination and a small amount of fiber breakage at the edge of the front face indentation. Analysis of the load-time signals recorded during impact showed that the load corresponding to the onset of delamination is independent of the impact energy in the range tested. Tensile and flexural tests performed on impacted specimens showed that the residual strengths and flexural modulus decrease with increasing incident impact energy, while the post-impact residual tensile modulus remains constant. The dynamic interlaminar fracture toughness was evaluated from the critical strain energy release rate during impact of specimens with a delamination simulated by an embedded insert. Results are then compared with interlaminar fracture toughness values obtained during steady crack growth.
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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 | 0.000 | 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".