Numerical modeling of a dual crush mode welded aluminum crash structure
Why this work is in the frame
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Bibliographic record
Abstract
Abstract The two main types of crush structures that are used to absorb energy during an automotive impact are the so-called axial crush and bending collapse structures. This paper presents results from a numerical study used to assess the crash performance of dual crush mode multi-gauge tailor-welded aluminum alloy crash structures that exhibit both modes of energy absorption. The design of these structures is based on testing of mono-gauge axial crush and s-rail structures, also presented in this paper. The axial crush structures were made from straight tubes, while the bending collapse structures (s-rails) consisted of tubes with two 45° bends that create an ȁsȁ shape. Numerical models were developed from axial crush structures with thinner tube walls welded to thicker gauge s-rails to create multi-gauge dual crush mode structures. A parametric study is presented in which the effects of the thickness ratio between the axial crush and the s-rail sections of the structure are investigated. Another parametric study is presented to examine the effects of varying cross sections of the s-rail section of the structure. Simulations of mono-gauge s-rail structures were used as a basis of comparison to assess the energy absorption performance of the multi-gauge dual crush mode structures. Dual crush mode structures are shown to lower the reaction load during impact and increase the crush displacement, compared to mono-gauge s-rail structures.
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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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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