Determining the Co-Efficient of End Constraint of Stretch Formed Microtruss Materials
Bibliographic record
Abstract
Microtruss cellular metals are a class of multifunctional materials, composed of a regular arrangement of supporting struts. They can be fabricated by stretching perforated metal sheets out of plane by applying force at strut intersections. Once fabricated, external loads are resolved axially along the struts resulting in stretch dominated deformation, yielding enhanced weight specific strength and stiffness at lower densities compared to conventional metallic foams. Given the slenderness of the struts making up the microtruss architecture, failure often occurs by inelastic buckling and is therefore dependent on the rigidity of the strut end constraints. During column buckling the limiting conditions are pin jointed ( k =1) and rigid jointed ( k =2), with microtruss struts typically having end constraints intermediate to these boundaries. Experimental and finite element methods were used to determine the value of k in IN600 microtrusses. Because of the non-linear stress-strain behavior of the parent metal, the relative significance of end constraint uncertainty is a function of the strut slenderness ratios and the material in question.
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How this classification was reachedexpand
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) | 0.002 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".