Numerical investigation of ultimate bearing capacity for transversely isotropic geostructures

被引：0
|
作者：
Chang J.-F. [1 ]
Chu X.-H. [1 ]
Xu Y.-J. [1 ]
机构：
[1] School of Civil and Architectural Engineering, Wuhan University, Wuhan
来源：
Chang, Jiang-Fang (cjf881024@163.com) | 2016年 / Northeast University卷 / 37期
关键词：
Cosserat continuum; Geostructures; Numerical simulation; Strain localization; Transversely isotropy; Ultimate bearing capacity;
D O I：
10.3969/j.issn.1005-3026.2016.07.024
中图分类号：
学科分类号：
摘要：
An elastic-plastic model for transversely isotropic geostructures is developed based on the Cosserat continuum. In the model, the elastic constitutive relationship is described by 5 deformation parameters and the Drucker-Prager yield criterion is extended by introducing fabric tensor and loading direction in the plastic stage. The iterative format for return mapping algorithms and the tangent modulus matrix are formulated for the proposed model. The numerical simulation is implemented based on the user subroutine (UEL) of ABAQUS, and a plane strain 8-noded reduced integrated element is used. The influence of the material principal direction and the anisotropic degree on the strain localization and the bearing capacity of the structure are analyzed. Numerical results show the validity and performance of the proposed model in simulating the strain localization behavior of transversely isotropic geostructures. Furthermore, the mesh dependency accompanied with strain localization is effectively solved. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.
引用
收藏
页码：1022 / 1027
页数：5
相关论文
共 10 条
  • [1] Duncan J.M., Seed H.B., Strength variation along failure surfaces in clay, Journal of Soil Mechanics & Foundations Division, 92, 6, pp. 81-104, (1966)
  • [2] Nova R., The failure of transversely isotropic rocks in triaxial compression, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 17, 6, pp. 325-332, (1980)
  • [3] Gao Z.W., Zhao J.D., Yao Y.P., A generalized anisotropic failure criterion for geomaterials, International Journal of Solids and Structures, 47, 22, pp. 3166-3185, (2010)
  • [4] Pietruszczak S., Mroz Z., Formulation of anisotropic failure criteria incorporating a microstructure tensor, Computers and Geotechnics, 26, 2, pp. 105-112, (2000)
  • [5] Azami A., Pietruszczak S., Guo P., Bearing capacity of shallow foundations in transversely isotropic granular media, International Journal for Numerical and Analytical Methods in Geomechanics, 34, 8, pp. 771-793, (2010)
  • [6] Rice J.R., Rudnicki J.W., A note on some features of the theory of localization of deformation, International Journal of Solids and Structures, 16, 7, pp. 597-605, (1980)
  • [7] Dietsche A., Steinmann P., Willam K., Micropolar elastoplasticity and its role in localization, International Journal of Plasticity, 9, 7, pp. 813-831, (1993)
  • [8] Cosserat E., Cosserat F., Théorie Des Corps Déformables, (1909)
  • [9] Chang J.F., Chu X.H., Xu Y.J., Finite-element analysis of failure in transversely isotropic geomaterials, International Journal of Geomechanics, 15, 6, (2014)
  • [10] Jin Y.-H., Sun Y., Qian Y.-L., Analysis of displacements of transversely isotropic foundation under level strip uniformly distributed load, Rock and Soil Mechanics, 26, pp. 163-167, (2008)
1