ON THE TOUGHNESS-INDUCED CRACK DECELERATION MECHANISM OF GAS PIPELINES TRANSMITTING GAS FROM THE WEST TO THE EAST
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Bibliographic record
Abstract
A numerical analysis method is developed to solve the problem of crack propagation in gas pipelines. It is based on the fundamental theories, methods and arrest criteria in dynamic fracture mechanics as well as finite element method (FEM) in shell dynamics. For high toughness pipelines, the decrease of heat dissipation caused by plastic work unloading cannot be neglected. By referring to the energy balance equation under the condition of nonuniform crack propagation, an iterative method is constructed to solve the instant speed in FEM. The dynamic fracture toughness comprised mainly of the heat dissipation rate is obtained through experiments, and is used as the given function of crack speed, to replace the original steady propagation mode and form the toughness-induced deceleration mechanism. To determine the parameters required in calculation, the two-specimen DWTT method is deducted to determine the heat dissipation rate formula.
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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) | 0.000 | 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 it