Experimental investigation of moisture absorption and mechanical properties of GFRP laminates for stay vane extensions
Bibliographic record
Abstract
This paper presents an experimental investigation into the moisture absorption behavior and mechanical properties of glass fiber-reinforced polymer (GFRP) laminates used in stay vane extensions for hydraulic turbines. The research addresses critical challenges posed by prolonged water exposure, focusing on two types of resins—Araldite RenInfusion 8601/Ren 8602 (epoxy) and Derakane 411-350 (vinylester)—and two types of fiberglass weaves—Non-Crimp Fabrics (NCF) and Satin. Laminates were subjected to accelerated aging at 40°C and natural aging at room temperature to simulate long-term water immersion. The study reveals that epoxy-based laminates exhibit higher moisture absorption rates and more pronounced mechanical degradation compared to vinylester-based laminates, primarily due to differences in resin susceptibility to hydrolysis and matrix plasticization. These findings underscore the importance of resin choice and moisture management in optimizing the durability and mechanical performance of GFRP laminates, providing valuable insights for improving composite materials in underwater applications within hydropower systems.
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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 | 0.000 | 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) | 0.000 | 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".