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Thermoplasticity andstrain localizationin transverselyisotropic materialsbased on anisotropiccritical stateplasticity Shabnam J. SemnaniJoshua A. WhiteRonaldo I. Borja2016 год

Thermoplasticity and strain localization in transversely isotropic materials based on anisotropic critical state plasticity
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Аннотация: Summary Geomaterials such as soils and rocks are inherently anisotropic and sensitive to temperature changes caused by various internal and external processes. They are also susceptible to strain localization in the form of shear bands when subjected to critical loads. We present a thermoplastic framework for modeling coupled thermomechanical response and for predicting the inception of a shear band in a transversely isotropic material using the general framework of critical state plasticity and the specific framework of an anisotropic modified Cam–Clay model. The formulation incorporates anisotropy in both elastic and plastic responses under the assumption of infinitesimal deformation. The model is first calibrated using experimental data from triaxial tests to demonstrate its capability in capturing anisotropy in the mechanical response. Subsequently, stress‐point simulations of strain localization are carried out under two different conditions, namely, isothermal localization and adiabatic localization. The adiabatic formulation investigates the effect of temperature on localization via thermomechanical coupling. Numerical simulations are presented to demonstrate the important role of anisotropy, hardening, and thermal softening on strain localization inception and orientation. Copyright © 2016 John Wiley & Sons, Ltd.
Год издания: 2016
Авторы: Shabnam J. Semnani, Joshua A. White, Ronaldo I. Borja
Издательство: Wiley
Источник: International Journal for Numerical and Analytical Methods in Geomechanics
Ключевые слова: Rock Mechanics and Modeling, Geotechnical Engineering and Soil Mechanics, Soil and Unsaturated Flow
Другие ссылки: International Journal for Numerical and Analytical Methods in Geomechanics (PDF)
International Journal for Numerical and Analytical Methods in Geomechanics (HTML)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (HTML)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (HTML)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (PDF)
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (HTML)