Stability of Viscoelastic Rings Under Radial Loads With Applications to Nuclear Technology
Bibliographic record
Abstract
The mechanics of an elastic helical coil are well known; however, the replacement of the elastic material with a viscoelastic material introduces a time dependency that requires a re-examination of the mechanics. A new theory has been developed that allows the prediction of the time to instability as a function of load, viscosity, and relaxation time, and is applied to an exemplar polyvinyl chloride (PVC) ring. The PVC ring shows that twist buckling dominates the instability, and the maximum critical time is approximately 90% of the relaxation period of the material achieved at a viscosity of 50%. Some viscosity is desirable to utilize the energy dissipation ability of a viscoelastic material. The new theory has a practical application in the field of nuclear reactor component design because the metals within the reactor are exposed to elevated temperatures thus exhibiting viscoelastic behavior. The Canadian Deuterium (CANDU®) reactor uses garter springs as spacers within the calandria of the reactor, and these spacers have been observed to move. A better understanding of the mechanics of the spacers may lead to improved spacer design.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 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 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".