Recovery of Polymer Glasses from Mechanical Perturbation
Bibliographic record
Abstract
Molecular dynamics simulations of a coarse-grained model of a polymer glass were used to study the recovery regime following deformation at constant stress or constant strain rate. We monitor dynamical as well as structural and energetic quantities to characterize the impact of deformation on the relaxation process. The α-relaxation times are reduced relative to an unperturbed sample immediately after deformation, and we observe a gradually increasing “erasure” of memory with increasing amount of deformation. Remarkably, the single deformation parameter that captures this continuous transition is the total strain at the end of deformation. For deformation up to of order the yield strain, the evolution of multiple measures of short-range order and the inherent structure energy closely track changes of the α-relaxation time, suggesting that the “rejuvenated” state is close to that of a younger glass. For larger strains accessible by constant strain rate deformation, however, plastic yield generates a distinctly different thermodynamic state.
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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".