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...
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| Format: | Article |
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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/18/4017 |
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| author | Jianfeng Li Jie Cui Yi Shan Yadong Li Bo Ju |
| author_facet | Jianfeng Li Jie Cui Yi Shan Yadong Li Bo Ju |
| author_sort | Jianfeng Li |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T16:25:16Z |
| format | Article |
| id | doaj.art-329390ca66db4abab3c0c2a6a7471572 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T16:25:16Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-329390ca66db4abab3c0c2a6a74715722023-11-20T13:17:49ZengMDPI AGMaterials1996-19442020-09-011318401710.3390/ma13184017Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain RangeJianfeng Li0Jie Cui1Yi Shan2Yadong Li3Bo Ju4School of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaSchool of Civil Engineering, Guangzhou University, Guangzhou 510006, ChinaAdding 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.https://www.mdpi.com/1996-1944/13/18/4017sand–rubber mixturecyclic triaxial testingdynamic shear modulusdamping ratioempirical model |
| spellingShingle | Jianfeng Li Jie Cui Yi Shan Yadong Li Bo Ju Dynamic Shear Modulus and Damping Ratio of Sand–Rubber Mixtures under Large Strain Range Materials sand–rubber mixture cyclic triaxial testing dynamic shear modulus damping ratio empirical model |
| 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 | sand–rubber mixture cyclic triaxial testing dynamic shear modulus damping ratio empirical model |
| url | https://www.mdpi.com/1996-1944/13/18/4017 |
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