Experimental Investigation of Effect of Gravity on Properties of Parts Fabricated by Fused Deposition Modeling Additive Manufacturing
Bibliographic record
Abstract
Additive manufacturing in space has the potential to revolutionize space exploration by enabling the in-situ production of parts. Although fused deposition modeling (FDM) additive manufacturing has been demonstrated in microgravity, its impact on the properties of FDM printed components remains unclear. This thesis attempts to reveal how microgravity affects the mechanical and material properties of parts printed by FDM with microgravity conditions simulated by varying raster and print orientations relative to gravity in the printing process. The experimental study examines the tensile, compressive, and dimensional properties of fabricated specimens, noting a general decline in tensile strength with increased gravity level at interfacial layers, except for full-gravity specimens that showed a different failure mechanism. Compressive strength and dimensions also decreased with higher gravity. Micro-CT imaging revealed voids, air gaps, and poor interlayer bonding in specimens at low gravity. These findings enhance the understanding of how gravity conditions impact FDM additive manufacturing.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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 source (direct Gemma or distilled Codex), 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".