XFEM using a non linear fracture mechanics approach for concrete crack propagation in dam safety assessment
Bibliographic record
Abstract
This paper presents a crack model that couples the benefits of the damage mechanics approach and the extended finite element method (XFEM). A local crack-tracking technique is developed to propagate a crack pattern along a single row of finite elements as a function of the equivalent principal stress direction. The level-sets are computed to predict the crack path and with the use of continuum damage mechanics, the path is corrected. Once a certain level of damage is reached inside an element, the level-sets computed previously are used to apply the XFEM formulation with Heaviside function within this element introducing a discontinuity in the displacement field. The three point beam tested by Bažant and Pfeiffer, the shear beam with single notch tested by Arrea and Ingraffea and the tension-shear specimen tested by Nooru-Mohamed are used for the validation of the proposed model that is targeted to be used shortly in dam safety application.
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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 | 0.000 | 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 | 0.001 |
| 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".