Experimental and Theoretical Analysis of Stress Superposition in Double-Hole Blasts
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Bibliographic record
Abstract
Abstract Using an experimental system of digital image correlation based on a high-speed camera which can be applied for blast-induced loading, model experiments of single-hole and double-hole blasts were conducted in polycarbonate specimens, and the evolutionary processes of the full-field strain were studied during blast loading. The results showed that the strain peak at the midpoint between two blastholes in double-hole blasts was 2.4–2.7 times as large as that in single-hole blasts. The stress superposition effect of double-hole blasts was much larger than 2, which is predicted by elastic wave theory. In addition, the superposition of double-hole blast stresses was analyzed by elastic and shock wave theories. These results indicated that when examining the superposition of blast stress waves, the shock wave theory is more in line with the experimental results. Based on the experimental results, there were discussions of the definition of the elastic vibration zone in the traditional blast theory.
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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 | 0.001 | 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