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An Elasto‐Plastic Formulation of a Soil‐Foundation Interface
Author(s) -
Ehlers Wolfgang,
Blome Peter
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310076
Subject(s) - geotechnical engineering , foundation (evidence) , boundary value problem , constitutive equation , interface model , porous medium , kinematics , porosity , plasticity , interface (matter) , rigid frame , hardening (computing) , materials science , frame (networking) , mechanics , geology , structural engineering , engineering , finite element method , classical mechanics , computer science , mathematics , physics , layer (electronics) , mechanical engineering , composite material , mathematical analysis , contact angle , history , archaeology , sessile drop technique , human–computer interaction
In this paper, a special interface formulation for the continuum mechanical description of the contact zone between soil and geotechnical foundation is presented. The proposed model is based on the Theory of Porous Media (TPM), a consistent approach to describe geomaterials in a macroscopic frame [1]. Assuming quasi‐static conditions, strains in the porous soil body are due to an elasto‐plastic work‐hardening model, whereas the constitutive properties of the interface are based on the continuous elasto‐plastic behaviour of the soil body and on the failure kinematics of the contact zone. Using the FE method, a 3‐d initial‐boundary‐value problem of a soil‐foundation interaction is discussed with a close look on the occurring localization phenomenon.