One-dimensional thermomechanical model for dynamic pseudoelastic response of shape memory alloys
Bibliographic record
Abstract
Experiments have shown that the mechanical response of shape memory alloys is highly sensitive to the loading rate. The origin of this rate-dependent behavior, however, is not the usual viscoelastic effect, but rather it arises from the complex coupling that exists among stress, temperature, and the rate of heat generation during stress-induced phase transformations. It has also been shown that the stress-induced transformations in NiTi shape memory alloys are inhomogeneous in nature and can result in localized deformation. This paper describes a one-dimensional model developed to capture the thermomechanical coupling and the localized phase transformations that occur during the dynamic response of shape memory alloys. The model is then implemented into a finite element code to simulate the dynamic behavior of a NiTi wire exposed to various thermomechanical loading conditions. The numerical simulations of the pseudoelastic response show close qualitative agreement with previously reported experimental data. Relaxation and restrained recovery in a partially transformed wire are also simulated to show the versatility of the model.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.003 | 0.001 |
| Insufficient payload (model declined to judge) | 0.005 | 0.001 |
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".