Undrained Stability of Unsupported Conical Slopes in Anisotropic Clays Based on Anisotropic Undrained Shear Failure Criterion

2021 ◽  
Author(s):  
Wittawat Yodsomjai ◽  
Suraparb Keawsawasvong ◽  
Teerapong Senjuntichai
Keyword(s):  
Failure Criterion ◽  
Shear Failure ◽  
Anisotropic Clays ◽  
Undrained Shear

scholarly journals An Approach for Stability Analysis of Gas/Fluid-Filled Cylindrical Hole in Laminated Materials

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Song Leng ◽  
Li Hou ◽  
Yang Duan
Keyword(s):  
Failure Criterion ◽  
Shear Failure ◽  
Cylindrical Hole ◽  
Material Strength ◽  
Strength Anisotropy ◽  
Plane Failure ◽  
Hole Wall ◽  
Weak Plane ◽  
Laminated Materials ◽  
Laminated Structures

An explicit analytical workflow for cylindrical hole stability analyses in general laminated materials that possess transversely isotropic (TI) anisotropy is presented. In this approach, the calculation of the distribution of the stresses around a cylindrical hole and the failure evaluation at the hole wall consider the effects of both material elasticity anisotropy and strength anisotropy caused by material laminated structures. Material strength anisotropy is assumed to be caused by the sliding of preexisting weakness planes oriented parallel to the isotropic plane of the material. The effect of anisotropy on strength is modeled by combining a shear failure criterion for the intact matrix and a weak plane failure criterion for the planes of weakness. We derive critical pressure solutions for the stability of the intact matrix around a hole filled with gas or fluid based on the Mohr–Coulomb failure criterion and Drucker–Prager failure criterion; either one of them can be combined with the weak plane failure criterion to give the solution for hole wall shear failure pressure. The solution for hole wall fracture initiation pressure is derived based on the tensile failure criterion. This approach can be applied to holes of arbitrary orientation in general laminated materials.

scholarly journals Cracking behaviour of fine-grained soils: from laboratory testing to numerical modelling

2019 ◽  
Vol 92 ◽  
pp. 16004
Author(s):  
Pierre Gerard ◽  
Ian Murray ◽  
Alessandro Tarantino
Keyword(s):  
Effective Stress ◽  
Failure Criterion ◽  
Shear Failure ◽  
Digital Camera ◽  
Failure Criteria ◽  
Fine Grained ◽  
Fine Grained Soil ◽  
Desiccation Cracking ◽  
Stress States ◽  
Stress Dependent

Many experimental evidences suggest that desiccation cracks in clay initiate as a result of the mobilization of soil tensile strength. However this mechanical approach disregards the cohesionless and effective stress-dependent behaviour of fine-grained soil. On the other hand recent findings in the literature suggest that effective stress-dependent shear failure criteria would be appropriate to explain the mechanisms of desiccation cracking for tensile total stress states. This work aims at assessing the validity of a shear failure criterion to predict the onset of cracking in clay forms exposed to air drying. Clay forms of various geometries were experimentally subjected to non-uniform hydraulic and mechanical boundary conditions. Time and location for crack initiation are monitored using a digital camera. Cracking experiments are then modelled in a hydro-mechanical framework using an effective-stress shear failure criterion. The comparison of simulations with experimental results for both the time and the location of cracking allows assuming that cracking occurs due to failure in shearing.

Research on Shear Failure Criterion for Layered Rock Mass

2012 ◽  
Vol 446-449 ◽  
pp. 1491-1496
Author(s):  
Zhi Zeng Zhang ◽  
Lan Lan Zhou ◽  
Zhen Xia Yuan ◽  
Zhong Hua Sun
Keyword(s):  
Rock Mass ◽  
Failure Criterion ◽  
Shear Failure ◽  
Layered Rock ◽  
Layered Rock Mass

Axial-Shear Failure Behavior of Human Femoral Trabecular Bone

1999 ◽  
Author(s):  
Yves P. Arramon ◽  
Oscar C. Yeh ◽  
Elise F. Morgan ◽  
Tony M. Keaveny
Keyword(s):  
Mechanical Behavior ◽  
Trabecular Bone ◽  
Failure Criterion ◽  
Shear Failure ◽  
Computer Models ◽  
Failure Behavior ◽  
Multiaxial Loading ◽  
Bone Implant ◽  
Computer Aided ◽  
Stress States

Abstract An understanding of the failure of trabecular bone subjected to multiaxial loading has relevance in the mechanics of trauma and bone implant interfaces. The development of computer aided tomography-based computer models allow predictions of the mechanical behavior of whole bones when subjected to stress states too complex to be described analytically (Ford et al., 1996; Keyak et al., 1998; Oden et al., 1998). However, these models cannot confidently predict the failure of the trabecular bone without an experimentally validated multiaxial failure criterion.

Shear failure criterion for RC T-beams

2018 ◽  
Vol 160 ◽  
pp. 44-55 ◽  
Author(s):  
Gregoria M. Kotsovou ◽  
Demitrios M. Cotsovos
Keyword(s):  
Failure Criterion ◽  
Shear Failure

Numerical Analysis of Composite Wind Turbine Blade Considering Failure Behavior

2012 ◽  
Vol 166-169 ◽  
pp. 375-378
Author(s):  
Man Wang ◽  
Rui Xiang Bai ◽  
Yan An Shen
Keyword(s):  
Turbine Blade ◽  
Failure Criterion ◽  
Shear Failure ◽  
Stiffness Degradation ◽  
Failure Behavior ◽  
Compressive Failure ◽  
Fiber Failure ◽  
Matrix Shear ◽  
Analysis Models ◽  
Complicated Configuration

The paper studies the failure of the 3-D complicated configuration composite turbine blade by applying failure criterion. This failure criterion considers three kinds of different failures. They are matrix tensile/compressive failure, fiber- matrix shear failure and fiber failure. By Using FEA software ABAQUS, the stiffness degradation and failure behavior of the turbine blade of composite structure were studied. The failure and stiffness degradation of the two analysis models were conducted by typical numerical examples as well.

Research on Shear Failure Criterion for Layered Rock Mass

2012 ◽  
Vol 446-449 ◽  
pp. 1491-1496 ◽  
Author(s):  
Zhi Zeng Zhang ◽  
Lan Lan Zhou ◽  
Zhen Xia Yuan ◽  
Zhong Hua Sun
Keyword(s):  
Rock Mass ◽  
Failure Criterion ◽  
Shear Failure ◽  
Three Dimensional ◽  
Confining Pressure ◽  
Triaxial Tests ◽  
Layered Rock ◽  
Layered Rock Mass ◽  
The Stability ◽  
Confining Pressure Effect

In order to study the stability of layered rock mass, a shear failure criterion for layered rock mass is presented and its program is compiled in C language. The shear failure criterion consists of two parts: firstly, four empirical expressions are suggested in which shear strength parameters vary with the direction; secondly, a pilot calculation method is developed to judge whether a shear failure plane in layered rock mass occurs or not and give its occurrence under three dimensional stress condition. A triaxial numerical experiment on layered rock mass is designed to test the shear failure criterion, and its results reflect the characters including obliquity effect, confining pressure effect and failure mode which conform to the previous triaxial tests.

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