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A critical state constitutive model for clean and silty sand.

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Title: A critical state constitutive model for clean and silty sand.
Authors: Wei, X.1 (AUTHOR), Yang, J.1 (AUTHOR) junyang@hku.hk
Source: Acta Geotechnica. Apr2019, Vol. 14 Issue 2, p329-345. 17p.
Subjects: Sand, Experimental programs, Elastic modulus, Human behavior models
Abstract: The mechanical behavior of silty sand is highly dependent on the percentage of fines in addition to the packing density and confining pressure. Properly modeling the diverse behavior of silty sand remains an area of difficulty and uncertainty. This paper presents an attempt to formulate a critical state-based constitutive model for sand with varying fines content based on several new laboratory findings. A marked feature of the model is a unified description of the state-dependent elastic modulus as well as a unified description of plastic hardening modulus such that only one set of elastic and hardening parameters is required for sand with different fines contents. The model is calibrated and validated using the results from a structured experimental program. It shows that the model can produce reasonably good predictions for undrained shear responses of sand specimens under a range of void ratios, confining stresses and fines contents. In particular, it successfully predicts the laboratory observation that under otherwise similar conditions, the presence of non-plastic fines increases the liquefaction susceptibility of sand. [ABSTRACT FROM AUTHOR]
Copyright of Acta Geotechnica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: A critical state constitutive model for clean and silty sand.
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  Data: <searchLink fieldCode="AR" term="%22Wei%2C+X%2E%22">Wei, X.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+J%2E%22">Yang, J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> junyang@hku.hk</i>
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  Data: <searchLink fieldCode="JN" term="%22Acta+Geotechnica%22">Acta Geotechnica</searchLink>. Apr2019, Vol. 14 Issue 2, p329-345. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Sand%22">Sand</searchLink><br /><searchLink fieldCode="DE" term="%22Experimental+programs%22">Experimental programs</searchLink><br /><searchLink fieldCode="DE" term="%22Elastic+modulus%22">Elastic modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Human+behavior+models%22">Human behavior models</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The mechanical behavior of silty sand is highly dependent on the percentage of fines in addition to the packing density and confining pressure. Properly modeling the diverse behavior of silty sand remains an area of difficulty and uncertainty. This paper presents an attempt to formulate a critical state-based constitutive model for sand with varying fines content based on several new laboratory findings. A marked feature of the model is a unified description of the state-dependent elastic modulus as well as a unified description of plastic hardening modulus such that only one set of elastic and hardening parameters is required for sand with different fines contents. The model is calibrated and validated using the results from a structured experimental program. It shows that the model can produce reasonably good predictions for undrained shear responses of sand specimens under a range of void ratios, confining stresses and fines contents. In particular, it successfully predicts the laboratory observation that under otherwise similar conditions, the presence of non-plastic fines increases the liquefaction susceptibility of sand. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Acta Geotechnica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11440-018-0675-0
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        Text: English
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        Type: general
      – SubjectFull: Experimental programs
        Type: general
      – SubjectFull: Elastic modulus
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      – SubjectFull: Human behavior models
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      – TitleFull: A critical state constitutive model for clean and silty sand.
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              Text: Apr2019
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