An experimental study of uniaxial fatigue behavior of an epoxy resin by a new noncontact real‐time strain measurement and control system
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Bibliographic record
Abstract
Abstract Uniaxial fatigue behavior of an epoxy resin was investigated with a recently established non‐contact real‐time strain measurement and control system. A relation of strain amplitude vs. fatigue life for fully‐reversed strain‐range‐controlled uniaxial fatigue tests was obtained. Quantitative analyses of evolutions of various mechanical properties (including stress range, elastic modulus, nonlinear stress‐strain relation, dissipated strain energy density, etc.) during entire fatigue life period were carried out based on recorded stress‐strain data. From the evolution of the stress‐strain hysteresis loops, a gradual degradation of modulus and a decrease of nonlinear effect in stress‐strain response were observed. It was also found that these two phenomena were independent of the loading control mode (stress‐control or strain‐range‐control) and the mean stress/strain values in the cyclic loading. Fractographic analysis was also performed and the mechanism of crack initiation and propagation of the epoxy material under cyclic loading was investigated. POLYM. ENG. SCI., 47:780–788, 2007. © 2007 Society of Plastics Engineers
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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)
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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 it