粗粒土边界面塑性模型及其积分算法

Translated title of the contribution: Bounding surface plasticity model for granular soil and its integration algorithm

Zeng Chun Sun, Cheng Gui Wang, Han Long Liu, Zhen Yu Yin, Huan Ran Wu, Yang Xiao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The strength and deformation behavior of granular soil have an important influence on the safety and stability of earth-rock dams, slopes and subgrade. For the strength and deformation behavior of granular soil under complex stress state, a state-dependent bounding surface plasticity model was established for granular soil by incorporating the state parameter and dynamic critical state line in the framework of the bounding surface plasticity theory and the critical state theory. The established model can not only predict the strain hardening and volumetric contraction, but also well describe the strain softening and volumetric expansion behaviors. Based on the secondary development platform of ABAQUS, the UMAT subroutine of the bounding surface plasticity model was developed by using the modified Euler integration algorithm with error control. The accuracy and convergence of the modified Euler integration algorithm were analyzed with different strain increments and integration error tolerance values. Finally, the rationality of the modified Euler integration algorithm with error control applied to the bounding surface plasticity model was verified by simulating the triaxial drained shear tests of granular soil under different densities and pressures, which laid a foundation for further engineering application.

Translated title of the contributionBounding surface plasticity model for granular soil and its integration algorithm
Original languageChinese (Simplified)
Pages (from-to)3957-3967
Number of pages11
JournalYantu Lixue/Rock and Soil Mechanics
Volume41
Issue number12
DOIs
Publication statusPublished - 10 Dec 2020

Keywords

  • Bounding surface
  • Granular soil
  • Modified Euler integration algorithm
  • State-dependent
  • UMAT

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Soil Science

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