Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/11228
Title: An elastic-viscoplastic constitutive model for earth materials
Authors: Baladi, George Y.
Rohani, Behzad
Keywords: Elastic-viscoplastic constitutive relationship
Rate-dependent material properties
Soil constitutive models
Stress-strain relations
Mathematical models
Numerical models
Continuum mechanics
Soil mechanics
Viscoelasticity
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; SL-82-10.
Description: Technical Report
Abstract: It has long been recognized that the stress-strain-strength properties of most geological materials under high-intensity dynamic loading conditions differ considerably from those related to relatively low-intensity static loadings. Thus realistic solutions to soil dynamic boundary-value problems require the use of constitutive models that can account for the dependency of the stress-strain-strength properties of earth materials to the various rates of loading or deformation being applied. This report describes the development of a three-dimensional elastic-viscoplastic work-hardening constitutive relationship for earth materials. The constitutive relationship is capable of reproducing the hysteretic behavior of the material under both hydrostatic and deviatoric states of stress; it also accounts for shear-induced volume change and the effect of superimposed hydrostatic stress on shearing response. The capability of the constitutive relationship for simulating the time-dependent response of earth materials is examined; an example fit for a clayey sand is given based on static laboratory triaxial shear and static and dynamic uniaxial strain test results.
Rights: Approved for public release; distribution is unlimited.
URI: http://hdl.handle.net/11681/11228
Appears in Collections:Technical Report

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