Development of Numerical Model for the Crashworthiness of Additively Manufactured Sandwich Lattices
Why this work is in the frame
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Bibliographic record
Abstract
View Video Presentation: https://doi.org/10.2514/6.2023-2200.vid Compared to other materials, cellular solids have superior energy absorption capabilities. Of particular interest within this material category are periodic lattice materials, which – in combination with advances in additive manufacturing technologies – allow not only for repeatable behavior, but also for a high degree of customization. In this paper, the crashworthiness of “sandwich” lattice structures is investigated, using both experimental and numerical investigations. After characterizing the quasi-static mechanical performance of solid nylon-carbon fiber and a solid engineering resin material, the response of single-layer cubic and octet lattices with a relative density of 30% made from those materials was characterized and compared. The response of multi-layer cubic and octet lattices was investigated before finally layering single-layer octet and cubic topologies to form two unique “sandwich” lattices. Stress-strain, efficiency-strain and other crashworthiness parameter data was gathered, and it was found that while the three-layer single-topology lattices were capable of absorbing 9.8 J (cube) and 7.8 J (octet), the designed sandwich lattices were experimentally capable of absorbing more: 19.0 J (octet-cube-octet) and 22.4 J (cube-octet-cube).
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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