Tensile and compressive damage assessment of a novel sandwich composite structure made of Kevlar/flax/epoxy hybrid laminates
Bibliographic record
Abstract
This is a study to quantify damage progression of a new Kevlar/flax/epoxy (KFE) hybrid composite made with 12 layers of pure flax fiber fabric sandwiched between 4 layers of pure Kevlar fiber weave. There were four versions of the composite: 0° unidirectional, 0°/90° cross-ply, ± 45° angle-ply flax fibers, and Kevlar fibers-only as the control. Composite plates were subjected to progressive load-unload levels in tension and compression until failure and were evaluated for stiffness degradation, permanent strain, and crack density. Unidirectional KFE laminates exhibited less damage accumulation compared to cross ply and angle ply configurations. Damage progression and failure of KFE hybrids mainly involved cracks through flax fiber bundles and at flax fiber/epoxy interfaces. The reported data are useful for damage-limited design structures made from a combination of natural and synthetic fibers.
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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 | 0.000 | 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".