Experimental Research on the Influence of an Empty-Hole Defect on Crack Connections Between a Directionally Fractured Blast Hole
Why this work is in the frame
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Bibliographic record
Abstract
Abstract In this work, we examine the distribution characteristics of a dynamic stress field surrounding an empty hole, as well as the influence of an empty hole on the dynamic behavior of main crack expansion caused by an explosion between double blast holes from a blast load effect by utilizing a new digital laser dynamic caustics (DLDC) experimental system. The results show that the two face-to-face expanded main cracks are deflected toward the empty hole and connect at the empty hole as a result of the influence of the guiding role of the empty hole. The influence of increasing the size of the empty hole on the orientation of the principle stress surrounding the empty hole is found to be ambiguous. The expansion speed and stress-intensity factor of the main crack tips in each case are analyzed. Moreover, the average expansion speed of the main crack for different shapes of empty holes are compared.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 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