A Phenomenological Primary–Secondary–Tertiary Creep Model for Polymer-Bonded Composite Materials
| Autor: | Hongwei Yuan, Jingjing He, Xiaochang Duan, Xuefei Guan, Wei Tang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Organic chemistry 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Article Root mean square Stress (mechanics) polymer-bonded composites material primary–secondary–tertiary creep 020303 mechanical engineering & transports Compressive strength QD241-441 0203 mechanical engineering Creep temperature- and stress-dependent phenomenological model Phenomenological model Range (statistics) Composite material 0210 nano-technology Reference model Test data |
| Zdroj: | Polymers, Vol 13, Iss 2353, p 2353 (2021) Polymers Volume 13 Issue 14 |
| ISSN: | 2073-4360 |
| Popis: | This study develops a unified phenomenological creep model for polymer-bonded composite materials, allowing for predicting the creep behavior in the three creep stages, namely the primary, the secondary, and the tertiary stages under sustained compressive stresses. Creep testing is performed using material specimens under several conditions with a temperature range of 20 °C–50 °C and a compressive stress range of 15 MPa–25 MPa. The testing data reveal that the strain rate–time response exhibits the transient, steady, and unstable stages under each of the testing conditions. A rational function-based creep rate equation is proposed to describe the full creep behavior under each of the testing conditions. By further correlating the resulting model parameters with temperature and stress and developing a Larson–Miller parameter-based rupture time prediction model, a unified phenomenological model is established. An independent validation dataset and third-party testing data are used to verify the effectiveness and accuracy of the proposed model. The performance of the proposed model is compared with that of an existing reference model. The verification and comparison results show that the model can describe all the three stages of the creep process, and the proposed model outperforms the reference model by yielding 28.5% smaller root mean squared errors on average. |
| Databáze: | OpenAIRE |
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