scholarly journals Comparison of microscopic structure in shear plane of the ring shear test and slip surface

2015 ◽  
Vol 52 (3) ◽  
pp. 123-131
Author(s):  
Hidehiko MURAO ◽  
Toshitaka KAMAI ◽  
Toru NOZAKA
Keyword(s):  
Shear Test ◽  
Slip Surface ◽  
Shear Plane ◽  
Microscopic Structure ◽  
Ring Shear Test ◽  
Ring Shear

Residual strength of smectite-dominated soils from the Kamenose landslide in Japan

1987 ◽  
Vol 24 (3) ◽  
pp. 456-462 ◽  
Author(s):  
Seiichi Gibo ◽  
Kazuhiko Egashira ◽  
Masami Ohtsubo
Keyword(s):  
Residual Strength ◽  
Shear Test ◽  
Slip Surface ◽  
Clay Fraction ◽  
Particle Orientation ◽  
Shear Mode ◽  
Ring Shear Test ◽  
Ring Shear ◽  
Shearing Resistance ◽  
Clay Fraction Content

The residual strength of smectite-dominated soils from the main slip surfaces of the Kamenose landslide, Japan, was measured by ring shear test, and the relations of the residual strength to the clay fraction content and clay particle orientation were studied. The residual angles of shearing resistance, [Formula: see text], were estimated assuming that the residual cohesion is zero. The magnitude of the residual angle of shearing resistance was dependent on the <2-μm clay fraction content, CF, and on the effective normal stress, [Formula: see text], because of curved strength lines. At [Formula: see text] equivalent to the overburden pressures, the soils had [Formula: see text] of 6–8°. These residual angles of shearing resistance were fitted on the [Formula: see text] – CF line for sand–bentonite mixtures, and exhibited the sliding shear mode.The orientation of smectite particles on shear surfaces showing slickensides was assessed by X-ray diffraction technique. The orientation of smectite particles was found to reduce the residual strength considerably, and this orientation effect was revealed more clearly at low effective normal stresses. Key words: residual strength, particle orientation, landslide, smectite, shear mode, slip surface, slickenside, clay mineral, physicochemical properties, ring shear test.

Surface Analysis of Shear Strength Tested Tungsten Carbide Thermal Spray Coatings+

1997 ◽  
Vol 3 (S2) ◽  
pp. 791-792 ◽  
Author(s):  
S. V. Naidu ◽  
Carlos Green ◽  
Christopher Maxie ◽  
James D. Garber ◽  
Gary A. Glass
Keyword(s):  
Thermal Spray ◽  
Adhesive Strength ◽  
Shear Test ◽  
Spray Coating ◽  
Test Method ◽  
Thermal Spray Coatings ◽  
Oxide Content ◽  
Ring Shear Test ◽  
Spray Coatings ◽  
Ring Shear

Thermal spray processing has become an important powder-consolidation technique to yield new materials for extremes of temperature, radiation, wear, corrosion and mechanical stresses. High Velocity Oxy-Fuel (HVOF) spray coating process gives higher deposition densities and coating hardness; lower oxide content and porosity. The adhesive strength of thermal spray coatings is greatly effected by the interfacial impurities. The ring shear test method shown in Fig. 1 appears to give the most accurate results on shear adhesive strength. A typical ring shear test result of 88WC12Co 1/4" ring HVOF thermal spray coating on 4140 steel rod using a Jet kote thermal spray gun is shown in Fig. 2. Repeated ring shear tests on similar samples prepared under same spray and test conditions resulted in different shear bond strength and coating ring displacement before break off. We examined the ring shear tested coatings using a Zeiss DMS942 Scanning Electron Microscope (SEM) and Kevex Energy Dispersive X-ray Spectrometer (EDXS) with LPX1 Quantum Si(Li) Detector.

scholarly journals Comparison of Strength Paremeters by Ring Shear Test and Back Analysis Method for Stability Evaluation of Reactivated Landslides

2021 ◽  
Vol 16 (1) ◽  
pp. 49-61
Author(s):  
Masahiro KANEKO ◽  
Atsushi KOYAMA ◽  
Munehiko SHITANO ◽  
Jiro HADA ◽  
Motoyuki SUZUKI
Keyword(s):  
Shear Test ◽  
Back Analysis ◽  
Stability Evaluation ◽  
Analysis Method ◽  
Ring Shear Test ◽  
Ring Shear
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