Static behavior of thick flax/epoxy composite laminates: multi-instrumentation mechanical failure analysis
Bibliographic record
Abstract
The use of thick composites in civil engineering and aeronautics fields is becoming increasingly common in primary or secondary structures, and natural fiber composites present a valuable alternative in terms of mechanical performance, cost and environmental impact. Investigating the mechanical characteristics and damage mechanisms that occur in thick flax/epoxy laminates is the primary objective of this research. Firstly, multi-instrumented bending tests and interlaminar shear tests were carried-out to assess the mechanical properties and failure characteristics of the composite. This multi-instrumentation concerns, the Acoustic Emission and the Digital Image Correlation techniques. In addition, postmortem observations utilizing Computed Tomography (CT) Scan and scanning electron microscopy (SEM) were carried out. Finite Elements and analytical models were proposed to evaluate the mechanical response. At the macroscale, results demonstrate a good correlation in the elastic zone between the numerical, analytical and the experimental. However, at the mesoscale the correlation is less evident especially close to the final failure of the laminate. Based on SEM and X-ray tomography images, the differences recorded are related mainly to the plies thickness variations and the waviness phenomenon induced by the manufacturing process.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.001 | 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".