Acta Mechanica Solida Sinica

, Volume 30, Issue 5, pp 507–519 | Cite as

Development and application of state-dependent fractional plasticity in modeling the non-associated behavior of granular aggregates

Article

Abstract

To characterize the constitutive behavior of granular aggregates, a non-associated plasticity model with two different yield and plastic potential surfaces was usually used. However, in this paper, a state-dependent fractional elastoplastic model is proposed by only performing the first- and fractional-order differentiations of the yield function. The non-associated plastic flow is obtained without using any plastic potential functions. The state dependence is considered by correlating the fractional order with a state parameter. The model is then validated by simulating a series of test results of different granular aggregates, including sand, ballast and rockfill, under a variety of loading conditions.

Keywords

Fractional plasticity Granular aggregates Non-associated flow 

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Copyright information

© The Chinese Society of Theoretical and Applied Mechanics and Technology 2017

Authors and Affiliations

  1. 1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, College of Civil and Transportation EngineeringHohai UniversityNanjingChina
  2. 2.College of Civil and Transportation EngineeringHohai UniversityNanjingChina
  3. 3.State Key Laboratory of Coal Mine Disaster Dynamics and Control, School of Civil EngineeringChongqing UniversityChongqingChina
  4. 4.School of Naval Architecture and Civil EngineeringJiangsu University of Science and TechnologyJiangsuChina

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