| Principle of Interaction between Plastic Volumetric and Shear Strains and the Constitutive Model for Geotechnical Materials |
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| 作者姓名： | Wang Jingtao |
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| 作者单位： | 1.Department of Architectural Engineering，Xinyang Normal University，Xinyang 464000，Henan，China;2.School of Civil Engineering and Mechanics，Huazhong University of Science and Technology，Wuhan 430074，China |
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| 摘 要： | Here is proposed the principle of interaction between plastic volumetric and shear strains, revealing the main origin of generating the complexity and variety of deformations for geotechnical materials. Here are also explained the manners of the interaction between plastic volumetric and shear strains and the conditions of generating shear dilatancy. It is demonstrated that dependency of the stress path exists and is a combination of effects of this interaction. According to this principle, it is theoretically proved that the space critical state line exists, and is unique and independent of the stress history. Based on this principle, the constitutive models that are able completely and accurately to characterize the basic behavior features for geotechnical materials have been constructed within the framework of thermodynamics. What is determined is a general expression of the constitutive relation as well as the inequality of the dissipative potential increment for obeying the second law of thermodynamics.
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Principle of Interaction between Plastic Volumetric and Shear Strains and the Constitutive Model for Geotechnical Materials |
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| Wang Jingtao.Principle of Interaction between Plastic Volumetric and Shear Strains and the Constitutive Model for Geotechnical Materials[J].Engineering Sciences,2007(2). |
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| Authors: | Wang Jingtao |
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| Abstract: | Here is proposed the principle of interaction between plastic volumetric and shear strains, revealing the main origin of generating the complexity and variety of deformations for geotechnical materials. Here are also explained the manners of the interaction between plastic volumetric and shear strains and the conditions of generating shear dilatancy. It is demonstrated that dependency of the stress path exists and is a combination of effects of this interaction. According to this principle, it is theoretically proved that the space critical state line exists, and is unique and independent of the stress history. Based on this principle, the constitutive models that are able completely and accurately to characterize the basic behavior features for geotechnical materials have been constructed within the framework of thermodynamics. What is determined is a general expression of the constitutive relation as well as the inequality of the dissipative potential increment for obeying the second law of thermodynamics. |
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| Keywords: | interaction between volumetric and shear strains constitutive model for rock and soil dependency of stress path pressure-sensitivity shear dilatancy |
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