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Research on the Triple-Shear Unified Cap Model for Soil

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Tutor: HuXiaoRong
School: Nanchang University
Course: Geotechnical Engineering
Keywords: thriple shear unified strength theory,The cap model of the triple-shear unified
CLC: TU411.7
Type: Master's thesis
Year:  2011
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Abstract:
Based on modified cam-clay model, the cap model of the triple-shear unified strength theory through different I1 and the Lord angles to control soil Failure ratio M that was a Constant in the cam-clay model. That model can more reasonable to describe the clay and sand¡¯s stress-strain relationship in the three-dimensional stress.Three parameters of I1¡¢J2 and J3 are used to express the the cap model of the triple-shear unified strength theory and the elasto-plastic constitutive matrix of the finite element method is obtained. This elasto-plastic constitutive model of the cap model of the triple-shear unified strength theory is derived based on the associated flow rule. Taking different intermediate principal stress coefficient b represents different criterions.The finite element subroutine (SJMAT.F) of the thriple shear unified strength theory is designed through the subroutine USERMAT.F based on the second development platform (UPFS) of ANSYS software. It can give geotechnical researcher Reference about the second development of ANSYS.Finally, In order to learn about ANSYS,and its operating procedures. Author used the D-P model to calculate the deformation of solid of a pile.
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