Creep Characteristics of Composite Geomembrane Based on Viscoelastic Models
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 4
Abstract
The creep characteristics of a composite geomembrane under different load levels were investigated by conducting a laboratory creep test for 2,100 h under 15 load levels from 10% to 80%. Test results showed that deformation increased rapidly when a load was applied, and the change in strain decreased gradually with an increase in time. The higher the load level, the higher the creep deformation and creep rate. When the load level was lower than or equal to 40%, the creep strain of the composite geomembrane increased linearly. When the load level was higher than or equal to 45%, the creep strain increase followed a quadratic function. When the load level was 40%–45%, the creep strain changed under the influence of the deformation characteristics of the composite material. Based on the creep test data, a piecewise empirical creep model with load level and time as parameters was established. The three-parameter and four-parameter viscoelastic constitutive models reflecting the creep properties were compared and analyzed, and it was found that the four-parameter model better reflected the creep characteristics of the composite geomembrane.
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Data Availability Statement
All data, models, and codes generated or used during the study appear in the published article.
Acknowledgments
We would like to thank Editage for the English language editing. This work was financially supported by the Natural Science Foundation of the Xinjiang Uygur Autonomous Region, China (No: 2022D01B105).
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 4 • April 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Dec 29, 2022
Accepted: Oct 6, 2023
Published online: Jan 29, 2024
Published in print: Apr 1, 2024
Discussion open until: Jun 29, 2024
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