Experimental Research of Crack Propagation in Polymethyl Methacrylate Material Containing Flaws Under Explosive Stress Waves
Why this work is in the frame
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Bibliographic record
Abstract
Abstract The crack propagation behavior of the material polymethyl methacrylate with flaws under the effects of explosive stress waves were studied using a digital laser dynamic caustics method. Four different kinds of experimental conditions were set: open joints, closed joints, confined pressure around the specimen, and double boreholes. A digital high-speed camera was utilized to record a series of dynamic caustics spots at the tip of the propagation wing cracks. The cracks' paths and the dynamic stress intensity factor (DSIF) at the tip of the two wing cracks are evaluated. Crack patterns, variation of DSIF, and the mechanisms of the wing cracking process are analyzed and discussed. The results provided an effective experimental basis for evaluating and designing directional controlled blasting for excavating rock faces and tunnels.
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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 | 0.003 | 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 | 0.000 | 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