Acta Mechanica Solida Sinica

, Volume 28, Issue 6, pp 647–658

# Fractional Order Modelling of the Cumulative Deformation of Granular Soils Under Cyclic Loading

Article

## Abstract

To model the cumulative deformation of granular soils under cyclic loading, a mathematical model was proposed. The power law connection between the shear strain and loading cycle was represented by using fractional derivative approach. The volumetric strain was characterized by a modified cyclic flow rule which considered the effect of particle breakage. All model parameters were obtained by the cyclic and static triaxial tests. Predictions of the test results were provided to validate the proposed model. Comparison with an existing cumulative model was also made to show the advantage of the proposed model.

## Key Words

cumulative deformation cyclic stress cyclic flow rule fractional derivative granular soil

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