Multi-scale Analyses of 3D Woven Composite Based On Periodicity Boundary Conditions
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Bibliographic record
Abstract
In this article, two-scale 3D finite element (FE) models, the microscopic repeated unit cell (RUC) model for yarn, and mesoscopic-repeated unit cell model for woven composite, are presented to predict the effective stiffness properties of 3D woven orthogonal interlock composites. The micro-RUC model for the yarn is based on a hexagonal array of fibers. Undulation of the yarns in the novel 3-D meso-RUC for the woven composite is described by Hermit-spline function. The periodic boundary conditions are applied to the two-scale models during the 3D FE analysis in order to ensure that both the displacement and stress are continuous on the boundary surfaces. Specimens are manufactured with house-made resin transfer molding (RTM) equipment and simple tensile experiment is performed. It is found that the predicted yarn properties by the micro-RUC agree well with data computed by equations with a suitable parameter determined by experiment and the predicted effective stiffness properties of 3-D woven composites by the meso-RUC are also in good agreement with the test data. Thus the correctness of the established multi-scale models and analysis method are verified.
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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) | 0.001 | 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 it