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Three-dimensional dissipative stress space considering yield behavior in deviatoric plane

Science China(Technological Sciences) 2013年第11期56卷 1999-2009页

作者： YAO YangPing CUI WenJie WANG NaiDong School of Transportation Science and Engineering Beihang University

Naturally deposited soils are always found in the complex three-dimensional stress *** models developed for modeling the three-dimensional mechanical behavior of soils should obey the basic laws of thermo-mechanical *** on the incremental dissipation function,a new deviatoric shift stress is derived and then introduced into the existing constitutive models to describe the yield behavior in the deviatoric plane for *** adopting the proposed shift stress,the relationship between dissipative stress tensors and true stress tensors can be ***,the threedimensional plastic strain can be calculated reasonably through the associated flow rule in the three-dimensional dissipative stress *** the same time,three methods that are conventionally adopted for generalizing constitutive models to model the three-dimensional stress-strain relationships are examined under the thermo-mechanical *** TS(transformed stress)method is shown to obey the thermo-mechanical rules and the TS space adopted in TS method is actually a translational three-dimensional dissipative stress ***,it is illustrated that the other two approaches,the method of using failure criterion directly and the method of using g()function,violate the basic rules of thermo-mechanical theories although they may bring convenience and simplicity to numerical analysis for geotechnical *** between model predictions and experimental data confirms the validity of the proposed three-dimensional dissipative stress space.

关键词： soils thermo-mechanics yield behavior shift stress stress space three-dimension

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