Instability of gradient dependent elasto-viscoplasticity for clay
Document Type
Article
Publication Date
8-18-1999
Department
Department of Materials Science and Engineering
Abstract
A gradient-dependent viscoplastic constitutive model for water saturated clay is proposed to describe the strain localization phenomena and pattern formation during deformation. Second- and fourth-order gradients of volumetric viscoplastic strain are introduced into the constitutive equations to account for the non-local effects due to the motion of microstructures. A linear perturbation analysis is applied to this model. The instability of the government equations (i.e. the constitutive equations and the equations of motion for the clay skeleton and pore water) is discussed for both the one-dimensional and the two-dimensional situations. In addition, issues concerned with the formulation of boundary value problems by finite element analysis in relation to the formulation and the boundary conditions are presented.
Publication Title
International Journal for Numerical and Analytical Methods in Geomechanics
Recommended Citation
Aifantis, E.,
Oka, F.,
Yashima, A.,
&
Adachi, T.
(1999).
Instability of gradient dependent elasto-viscoplasticity for clay.
International Journal for Numerical and Analytical Methods in Geomechanics,
23(10), 973-994.
http://doi.org/10.1002/(SICI)1096-9853(19990825)23:10<973::AID-NAG20>3.0.CO;2-M
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/3287