Effect of tensile loading history on mechanical properties for polyethylene
Bibliographic record
Abstract
Influence of loading history on the mechanical properties for polyethylene (PE) was examined through an experimental study, in which each specimen was subjected to two short‐term tensile tests that were conducted at least 1 month apart. The first test was to apply various loading histories to specimens, and the second test to characterize the corresponding change in mechanical properties. The results show clearly that the loading history introduced in the first test affects mechanical properties measured from the second test. In particular, the initial tangent modulus and stress response to deformation from the second test show a noticeable decrease with the increase of the applied strain introduced in the first test, even at the applied strain for the first test as low as 0.05. Change in mechanical properties was also found to depend on loading mode (cyclic and monotonic) and crosshead speed (1 mm/min and 5 µm/min) used in the first test. The above changes are explained based on the microstructural concept of interphase that is located in the interlamellar region and has a less ordered microstructure than the crystalline lamella. Based on results from this study, further investigation is planned to obtain direct evidence to support the idea. POLYM. ENG. SCI., 55:2002–2010, 2015. © 2014 Society of Plastics Engineers
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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 | 0.001 | 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) | 0.000 | 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".