scholarly journals Development and Performance Evaluation of a Bevameter for Measuring Soil Strength

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1541
Author(s):  
Ji-Tae Kim ◽  
Dong-U Im ◽  
Hyuek-Jin Choi ◽  
Jae-Won Oh ◽  
Young-Jun Park
Keyword(s):  
Shear Test ◽  
Normal Pressure ◽  
Soil Strength ◽  
Pressure Variation ◽  
Circular Plates ◽  
Dead Load ◽  
Test Device ◽  
Plate Size ◽  
Slip Displacement ◽  
And Performance

The driving performance of an off-road vehicle is closely related to soil strength. A bevameter is used to measure the soil strength, and it usually consists of two independent devices: a pressure–sinkage test device and a shear test device. However, its development and measurement processes have not been standardized; thus, researchers apply it in various fields according to their own discretion. In this study, a new bevameter was developed, and experiments were conducted to clarify the factors that affect the measurement performance of the bevameter. The pressure–sinkage test device was tested with circular plates of different sizes, and the results confirmed that the pressure–sinkage parameters decreased with the plate size. For the shear-test device, normal pressure was applied using a dead load to prevent normal-pressure variation due to displacement and speed. In addition, a spline was installed on top of the shaft connected to the shear ring to measure slip sinkage during the shear test. The results showed that the slip sinkage increased in proportion to the normal pressure and slip displacement, but the increase gradually decreased and converged to a certain point.

scholarly journals Determination of Soil Strength Using 2D Geoelectric Methods and Direct Shear Test (Case Study in Istana Tidar Regency Housing – Jember)

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Nurul Priyantari ◽  
Supriyadi . ◽  
Devi Putri Sulistiani ◽  
Winda Aprita Mayasari
Keyword(s):  
Direct Shear Test ◽  
Shear Test ◽  
Resistivity Measurement ◽  
Soil Strength ◽  
Test Case ◽  
Cohesive Soils ◽  
Direct Shear ◽  
Geoelectrical Resistivity

2D geoelectrical resitivity measurement and direct shear test has been conducted to determine soil type and soil strength on land settlement Istana Tidar Regency housing, Jember. Resistivity measurement is conducted at two line that have latitude 08.10’102” – 08.10’108” S, 113.43’404” – 113.43’408” E (line 1) dan 08.10’102” – 08.10’108” S, 113.43’410” – 113.43’414” E (line 2). Soil specimen were taken at 3 point, 2 point at line 1 and 1 point at line 2. Based on result of 2D geoelectrical resistivity measurement and direct shear test, this location was dominated by clay, silt and sandy silt are included in the type of cohesive soils. Soil strength of this type is capable to support light bulding contruction one or two floors.

Characterization and Representation of Crystallographic Texture Fields in Processed Alloys

1999 ◽  
Vol 5 (S2) ◽  
pp. 234-235
Author(s):  
M.P. Miller ◽  
T.J. Turner ◽  
J.A. Sutliff
Keyword(s):  
Crystallographic Texture ◽  
High Speed ◽  
Thick Plate ◽  
Grain Morphology ◽  
Material Structure ◽  
Rolled Aluminum ◽  
Plate Size ◽  
And Performance ◽  
Critical Components ◽  
Hot Rolled

Deformation and thermal processing operations can produce structurally heterogeneous and anisotropic alloys. Thick, hot-rolled aluminum plate is an excellent example of such a material. Due to the plate size and thermomechanical conditions experienced by the plate during processing, significant gradients in material structure arise. These gradients are especially strong in the through-thickness or normal direction (ND) of the plate. In AA 7050, an aluminum alloy developed for thick plate applications, gradients in microporosity, grain morphology and crystallographic texture are known to exist. These features have been linked to material properties and performance measures in this alloy. Recent advances in high speed machining technology have made it possible to consider thick AA 7050 plate for an increasingly large number of airframe components. Because of its inherent heterogeneity, however, designing flight-critical components machined from AA 7050 plate will require one to quantify and mathematically represent the variation of the relevant microstructural gradients.

scholarly journals Laboratory development of a vertically oriented penetrometer for shallow seabed characterization

2016 ◽  
Vol 53 (1) ◽  
pp. 93-102 ◽  
Author(s):  
Fauzan Sahdi ◽  
David J. White ◽  
Christophe Gaudin ◽  
Mark F. Randolph ◽  
Noel Boylan
Keyword(s):  
Soil Surface ◽  
Site Investigation ◽  
Soil Strength ◽  
Small Scale ◽  
Soil Parameters ◽  
Embedment Depth ◽  
Fine Grained ◽  
Centrifuge Models ◽  
Measured Resistance ◽  
And Performance

Current site investigation practice for offshore pipeline design relies on soil parameters gathered from boreholes or in situ test soundings to depths of 1–2 m below the mudline. At these depths, the fine-grained seabed is very soft and possesses low undrained strength, which can be difficult to measure. This paper describes a centrifuge test programme undertaken to evaluate the feasibility and performance of a novel penetrometer designed to assess the shallow strength of soft seabed over continuous horizontal profiles. This device is termed the vertically oriented penetrometer (VOP). Tests were performed on a normally consolidated kaolin sample, with the VOP translated horizontally at velocities ranging from 1 to 30 mm/s, after embedding the VOP at 30 and 45 mm depths. All tests involved many cycles of VOP forward and backward movement to assess its potential to derive the ratio of intact to fully remoulded strength. Strength determination is achieved by dragging the VOP at a specified embedment depth along the soil surface, and deriving the soil strength from the measured resistance as if the VOP were a laterally loaded pile. The VOP is shown to yield comparable strength measurements to that of a T-bar penetrometer. The VOP is a potentially valuable addition to the range of tools used to characterize soil strength, both in small-scale centrifuge models and, following practical development, potentially also in the field.

Buckling and Post-buckling Behavior of Elliptical Plates: Part II—Results

1990 ◽  
Vol 57 (4) ◽  
pp. 989-994 ◽  
Author(s):  
Herzl Chai
Keyword(s):  
Plate Boundary ◽  
Normal Pressure ◽  
Load Level ◽  
Material Body ◽  
Buckling Behavior ◽  
Plate Size ◽  
Bending Stresses ◽  
Post Buckling ◽  
Large Material ◽  
Plate Solution

The large-deflection plate solution developed in Part I is used here to study the buckling and post-buckling deformation and stress characteristics of an elliptically-shaped surface layer that has been delaminated from a large material body. The economical, yet accurate nature of this solution, together with available graphic routines, has made it possible to present, figuratively, a comprehensive description of the plate behavior. The conditions for a layer-substrate overlap and the variations of membrane and bending stresses along the plate boundary are emphasized. Deformations were induced either by a normal pressure or a biaxial displacement field applied to the plate boundary. The problem variables are plate size and shape, details of load biaxiality, and load level.

scholarly journals Pengujian Geser Limestone Untuk Menghitung Angka Keamanan Terhadap Kelongsoran Di Utama Mandala Pura Uluwatu

2019 ◽  
Vol 24 (1) ◽  
pp. 13
Author(s):  
I Nyoman Ramia ◽  
I Wayan Arya ◽  
I Wayan Wiraga ◽  
I G A G I G A G Suryanegara
Keyword(s):  
Shear Strength ◽  
Slope Stability ◽  
Direct Shear Test ◽  
Shear Test ◽  
Dead Load ◽  
Soil Shear Strength ◽  
Engineering Department ◽  
Sliding Test ◽  
The Stability ◽  
The Temple

The shear strength value is one of the important points in calculation of slope stability. One way to obtain the shear strength value is to do a direct shear test in laboratory. Like the cliff reinforcement study at Utama Mandala Uluwatu temple which is currently experiencing crack, it is necessary to test the shear strength of the limestone material at the cliff of the temple . There is no limestone testing equipment in the laboratory of the Civil Engineering Department, so that innovation is needed on the existing sliding test equipment. In this study innovation was carried out on how to test the soil shear strength so that it could be used to test the limestone shear strength. The test is done by moving two limestone surface that have been formed based on the mold tool which shape is circle. The shear strength slope at Uluwatu temple, which is currently experiencing crack in dry condition is . The shear strength value is used for calculating slope stability at Uluwatu Temple which is currently experiencing crack wich . The calculation used is curved slope stability by only calculate the life load and dead load. From the calculation of the stability of the slope, the safety factor is 1.15.

Combined shear and compression analysis using a modified Iosipescu shear test device. Experimental studies on dry wood

Holzforschung ◽  
2005 ◽  
Vol 59 (5) ◽  
pp. 539-545 ◽  
Author(s):  
Federica De Magistris ◽  
Lennart Salmén
Keyword(s):  
Shear Test ◽  
Experimental Studies ◽  
Honeycomb Structure ◽  
Local Deformation ◽  
Homogeneous Material ◽  
Test Device ◽  
Element Analysis ◽  
Compression Load ◽  
New Apparatus ◽  
Iosipescu Shear Test

Abstract The mechanical treatment of wood in a refiner involves a complex combination of shear and compression forces. To obtain more knowledge on this process, the possibility of using an apparatus based on the Iosipescu shear test device to measure the behaviour of wood under a combined shear and compression load was tested. In this new apparatus, different combinations of shear and compression load were achieved by different rotations of the shear test device itself. Numerical simulations of the combined shear and compression test were carried out and compared with experimental data to verify the reliability of the modified device as applied to wood. It was concluded that the new apparatus is suitable for applying different combinations of shear and compression load in testing wood samples. However, finite element analysis showed that with the use of homogeneous material in the model, the level of strain reached would be 10-fold smaller. This fact is probably due to the honeycomb structure of the wood cells, which allows for different local deformation that could not be represented by the continuous material used in the model.

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