Polyurethane foam mechanical reinforcement by low-aspect ratio micro-crystalline cellulose and glass fibres
Bibliographic record
Abstract
The effect of fibre length and fibre aspect ratio on the reinforcement of soybean-based polyurethane foams was investigated. Micro-crystalline cellulose fibres and 260-µm long glass fibres embedded inside polyurethane foams were studied separately. Using X-ray tomography, it was determined that short micro-crystalline cellulose fibres were found solely embedded within the cell struts of the polyurethane foam. The cell struts were reinforced by the micro-crystalline cellulose fibres based on composite theory. An attempt was made to predict the reinforcement by using existing micro-mechanical models including the rule of mixtures and shear-lag theory. The overall foam compressive modulus increased based on the reinforcement of the cell struts and correlated with the foam mechanics model developed by Gibson and Ashby. The intermediate length 260-µm long glass fibres were found to span cells in polyurethane foam and were not embedded within the cell struts. These glass fibres did not contact each other. The reinforcement performance of the intermediate length glass fibres was found to be worse than the short micro-crystalline cellulose fibres. Therefore, these intermediate length fibres that span cells should be avoided for use in reinforcement of soybean-based polyurethane foams.
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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 | 0.001 | 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 | 0.001 | 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".