scholarly journals Elastic property of damaged zone inferred from in-situ stresses and its role on the shear strength of faults

2002 ◽  
Vol 54 (11) ◽  
pp. 1181-1194 ◽  
Author(s):  
Kiyohiko Yamamoto ◽  
Namiko Sato ◽  
Yasuo Yabe
Keyword(s):  
Shear Strength ◽  
Elastic Property ◽  
In Situ Stresses ◽  
Damaged Zone

Effective stress vane shear strength correction factor correlations

1994 ◽  
Vol 31 (3) ◽  
pp. 335-342 ◽  
Author(s):  
Peter H. Morris ◽  
David J. Williams
Keyword(s):  
Shear Strength ◽  
Correction Factor ◽  
Effective Stress ◽  
Liquid Limit ◽  
Plasticity Index ◽  
Soil Parameters ◽  
In Situ Stresses ◽  
Rate Effects ◽  
Made In

A recent effective stress model of vane shear strength testing in soils can relate measured torques to vane shear strengths using theoretical analysis in terms of effective stress parameters. The strength estimates are based on known in situ stresses and soil parameters derived from laboratory testing. The model may be applied, for example, in obtaining theoretical estimates of conventional undrained vane shear strengths for comparison with field data and for use in stability analyses. However, the model incorporates a correction factor μv, analogous to Bjerrum's field vane shear strength correction factor μ, intended to compensate for pore-pressure and shearing-rate effects. This correction factor must be evaluated before reliable torque or shear strength estimates can be made in any given case. To facilitate this, the paper presents correlations of μv with both liquid limit and plasticity index, based on world-wide data from clays and silts. The correlations are compared with independent data from Norwegian clays. Key words : clay, correction factor, effective stress, liquid limit, plasticity index, silt, vane shear strength.

scholarly journals Excavation unloading‐induced fracturing of hard rock containing different shapes of central holes affected by unloading rates and in situ stresses

2019 ◽  
Vol 8 (1) ◽  
pp. 4-27 ◽  
Author(s):  
Fan Feng ◽  
Shaojie Chen ◽  
Diyuan Li ◽  
Wanpeng Huang ◽  
Kang Peng ◽  
...  
Keyword(s):  
Hard Rock ◽  
In Situ Stresses ◽  
Different Shapes

Development of ultrasonic methods for measuring in-situ stresses at great depth

1983 ◽  
Vol 1 (1) ◽  
pp. 21-42 ◽  
Author(s):  
W.H. Su ◽  
S.S. Peng ◽  
S. Okubo ◽  
K. Matsuki
Keyword(s):  
Great Depth ◽  
Ultrasonic Methods ◽  
In Situ Stresses

In-Situ Stresses in Low-Permeability, Nonmarine Rocks

1989 ◽  
Vol 41 (04) ◽  
pp. 405-414 ◽  
Author(s):  
N.R. Warpinski ◽  
L.W. Teufel
Keyword(s):  
Low Permeability ◽  
In Situ Stresses

Test Methods for Mechanical Properties of Structural Adhesives

2010 ◽  
Vol 97-101 ◽  
pp. 814-817 ◽  
Author(s):  
Jun Deng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Shear Strength ◽  
Elastic Modulus ◽  
Butt Joint ◽  
Test Methods ◽  
Joint Specimen ◽  
Lap Shear ◽  
Better Than

One of the greatest drawbacks to predicting the behaviour of bonded joints has been the lack of reliable data on the mechanical properties of adhesives. In this study, methods for determining mechanical properties of structural adhesive were discussed. The Young’s modulus, Poisson’s ratio and tensile strength of the adhesive were tested by dogbone specimens (bulk form) and butt joint specimens (in situ form). The shear modulus and shear strength were test by V-notched specimens (bulk form) and thick adherend lap-shear (TALS) joint specimens (in situ form). The test results show that the elastic modulus provided by the manufacturer is too low, the dogbone specimen is better than the butt joint specimen to test the tensile strength and elastic modulus and the TALS joint specimen is better than the V-notched specimen to test the shear strength.

Model experimental study on the effects of in situ stresses on pre-splitting blasting damage and strain development

2021 ◽  
Vol 138 ◽  
pp. 104587
Author(s):  
Liyun Yang ◽  
Aiyun Yang ◽  
Siyu Chen ◽  
Shizheng Fang ◽  
Chen Huang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Strain Development ◽  
In Situ Stresses

scholarly journals 3C-SiC Nanowires In-Situ Modified Carbon/Carbon Composites and Their Effect on Mechanical and Thermal Properties

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 894 ◽  
Author(s):  
Hongjiao Lin ◽  
Hejun Li ◽  
Qingliang Shen ◽  
Xiaohong Shi ◽  
Tao Feng ◽  
...  
Keyword(s):  
Shear Strength ◽  
Thermal Properties ◽  
Sol Gel ◽  
Interlaminar Shear Strength ◽  
Mechanical And Thermal Properties ◽  
Initial Oxidation ◽  
Sic Nanowires ◽  
Out Of Plane ◽  
Interlaminar Shear

An in-situ, catalyst-free method for synthesizing 3C-SiC ceramic nanowires (SiCNWs) inside carbon–carbon (C/C) composites was successfully achieved. Obtained samples in different stages were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman scattering spectroscopy. Results demonstrated that the combination of sol-gel impregnation and carbothermal reduction was an efficient method for in-situ SiCNW synthesis, inside C/C composites. Thermal properties and mechanical behaviors—including out-of-plane and in-plane compressive strengths, as well as interlaminar shear strength (ILLS) of SiCNW modified C/C composites—were investigated. By introducing SiCNWs, the initial oxidation temperature of C/C was increased remarkably. Meanwhile, out-of-plane and in-plane compressive strengths, as well as interlaminar shear strength (ILLS) of C/C composites were increased by 249.3%, 109.2%, and 190.0%, respectively. This significant improvement resulted from simultaneous reinforcement between the fiber/matrix (F/M) and matrix/matrix (M/M) interfaces, based on analysis of the fracture mechanism.

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