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Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range
Adding rubber into sands has been found to improve the mechanical behavior of sands, including their dynamic properties. However, ambiguous and even contradictory results have been reported regarding the dynamic behavior of sand–rubber mixtures, particularly in terms of the damping ratio. A series o...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559381/ https://www.ncbi.nlm.nih.gov/pubmed/32927873 http://dx.doi.org/10.3390/ma13184017 |
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author | Li, Jianfeng Cui, Jie Shan, Yi Li, Yadong Ju, Bo |
author_facet | Li, Jianfeng Cui, Jie Shan, Yi Li, Yadong Ju, Bo |
author_sort | Li, Jianfeng |
collection | PubMed |
description | Adding rubber into sands has been found to improve the mechanical behavior of sands, including their dynamic properties. However, ambiguous and even contradictory results have been reported regarding the dynamic behavior of sand–rubber mixtures, particularly in terms of the damping ratio. A series of cyclic triaxial tests were, therefore, performed under a large range of shear strains on sand–rubber mixtures with varying rubber volume contents, rubber particle sizes, and confining pressures. The results indicate the dynamic shear modulus decreases with increasing rubber volume content and with decreasing particle size and confining pressure. The relationship of the damping ratio to the evaluated parameters is complicated and strain-dependent; at shear strains less than a critical value, the damping ratio increases with increasing rubber volume content, whereas the opposite trend is observed at greater shear strains. Furthermore, sand–rubber mixtures with different rubber particle sizes exceed the damping ratio of pure sand at different rubber volume contents. A new empirical model to predict the maximum shear moduli of mixtures with various rubber volume contents, rubber particle sizes, and confining pressures is accordingly proposed. This study provides a reference for the design of sand–rubber mixtures in engineering applications. |
format | Online Article Text |
id | pubmed-7559381 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-75593812020-10-26 Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range Li, Jianfeng Cui, Jie Shan, Yi Li, Yadong Ju, Bo Materials (Basel) Article Adding rubber into sands has been found to improve the mechanical behavior of sands, including their dynamic properties. However, ambiguous and even contradictory results have been reported regarding the dynamic behavior of sand–rubber mixtures, particularly in terms of the damping ratio. A series of cyclic triaxial tests were, therefore, performed under a large range of shear strains on sand–rubber mixtures with varying rubber volume contents, rubber particle sizes, and confining pressures. The results indicate the dynamic shear modulus decreases with increasing rubber volume content and with decreasing particle size and confining pressure. The relationship of the damping ratio to the evaluated parameters is complicated and strain-dependent; at shear strains less than a critical value, the damping ratio increases with increasing rubber volume content, whereas the opposite trend is observed at greater shear strains. Furthermore, sand–rubber mixtures with different rubber particle sizes exceed the damping ratio of pure sand at different rubber volume contents. A new empirical model to predict the maximum shear moduli of mixtures with various rubber volume contents, rubber particle sizes, and confining pressures is accordingly proposed. This study provides a reference for the design of sand–rubber mixtures in engineering applications. MDPI 2020-09-10 /pmc/articles/PMC7559381/ /pubmed/32927873 http://dx.doi.org/10.3390/ma13184017 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Li, Jianfeng Cui, Jie Shan, Yi Li, Yadong Ju, Bo Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range |
title | Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range |
title_full | Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range |
title_fullStr | Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range |
title_full_unstemmed | Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range |
title_short | Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range |
title_sort | dynamic shear modulus and damping ratio of sand–rubber mixtures under large strain range |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7559381/ https://www.ncbi.nlm.nih.gov/pubmed/32927873 http://dx.doi.org/10.3390/ma13184017 |
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