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SCIENCE CHINA Technological Sciences, Volume 61 , Issue 10 : 1546-1555(2018) https://doi.org/10.1007/s11431-017-9205-8

A constitutive model for granular soils

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  • ReceivedDec 20, 2017
  • AcceptedJan 24, 2018
  • PublishedMar 23, 2018

Abstract

A simple constitutive model is presented to describe the mechanical behaviors of granular soils in a large stress range. A novel normal compression line (NCL) is first expressed by introducing a limit void ratio (eL) in the double logarithmic scale. Subsequently, a state parameter (ξ) is defined to quantify the current state of granular soils, and a unified hardening parameter (H) that is a function of the state parameter (ξ) is developed to govern the hardening process of the drop-shaped yield surface. Combining with flow rule, a constitutive model for granular soils is proposed. Finally, the comparison between the predictions and the test results of Cambria sand and Coarse-grained material indicates that the model is able to describe the mechanical behaviors of granular soils in a large stress range.


Funded by

the National Basic Research Program of China(Grant,No.,2014CB47006)

the National Natural Science Foundation of China(Grant,Nos.,51579005,&,11672015)


Acknowledgment

This work was supported by the National Basic Research Program of China (Grant No. 2014CB47006) and the National Natural Science Foundation of China (Grant Nos. 51579005 & 11672015).


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