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Showing 1 to 20 of 137 for “"Relative Density"”.
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Liquefaction Potential of Unsaturated Nevada Sand Considering Different Intial Conditions
… and 2) how do the initial conditions, including relative density, effective confining pressure, and degree of saturation affect the liquefaction potential of unsaturated soils?</p> <p>To answer the above questions, a series of strain-controlled undrained cyclic loading triaxial tests on saturated …
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Estudo da resistência ao cisalhamento e densidade relativa das areias e correlações com o SPT
… the determination of ''maximum" and "minimum" density of sand and finishes, adopting "dynamic compactation'' and the Kolbuszewski 's Method'' to obtain the maximum and minimum density respectively. The second part, the characterization and "direct shear'' tests performed on nine different kinds …
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Field and Laboratory Investigation of Asphalt Pavement Permeability
… quality of the newly finished roads utilizes relative density alone which may not necessarily reflect the actual properties that are required in the finished pavement. This research aims to perform comprehensive investigations concerning the hot mix asphalt (HMA) pavement permeability as a …
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Electrical resistivity of sandy soil with water, leachates and seawater
… specifically water/fluid content and relative density of the soil, and the types of permeant employed in the tests, namely distilled water, tap water, three leachates and seawater. For a landfill system situated near a salt water body, the effects of seawater and seawater-leachate …
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Fabrication and Compressive Yield Strength of Open Cell Corrugated Cellular Solids
… to create cellular solids having relative densities ranging from 0.0384 to 0.0920. Test samples were then quasistatically compressed to measure the stress-strain response. The stress level at 25% strain (compressive yield strength) was plotted as a function of relative density and …
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Scaled experimental study on excavation of lunar regolith with rakes/rippers and flat blade
… and different conditions, namely gravel content, relative density, and tine spacing on a rake, is investigated with scaled experiments. Geotechnical properties of JSC-1A were determined, in addition to the simulants' stress-strain relationships over a wide range of relative density (13% to near …
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On the rate-dependent constitutive response of cortical and trabecular bone
… micro CT data in such a way that matched the relative density of the resulting specimen mesh to the experimentally recorded value. Analysis of both the experimental and simulation results further demonstrates that 1) local distributions in strut relative density are highly influential in the …
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Factors Influencing Use of Fecal Line Surveys For Estimating Trends in Predator Populations in Western South Dakota
Development of a technique to estimate relative densities of coyote (Canis latrans), red fox (Vulpes vulpes), and striped skunk (Mephitis mephitis) populations is necessary to monitor population changes in western South Dakota. Fecal line surveys were used to estimate relative densities because …
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Effective properties of magneto-electro-elastic two-dimensional cellular solids
… effective properties as a function of the relative density. Results obtained for purely elastic properties were compared with results from other studies and showed good agreement. Varying microstructures of the cellular solids including square, equilateral triangle and hexagonal systems, …
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The influence of process route on mechanical property development in sintered commercially pure and blended elemental titanium
… behavior during processing is more predictable. Relative density and the microstructural feature were studied in-depth in order to understand their impact on mechanical properties. The two starting materials were sintered under vacuum (approximately 10-5 mbar) at 1000⁰C (6hrs), 1100⁰C (2, 4, …
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Thermomechanical processing of blended elemental powder Ti-6Al-4V alloy
… (TMP) in an attempt to both improve the relative density and refine the microstructure. The powders used were direct reduction titanium powder and elemental aluminium and vanadium powders.
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Expanded Byrne Model for Evaluating Seismic Compression
… coefficients are solely correlated with soil relative density. This is in contrast to findings from studies performed over the last two decades that show various environmental and compositional factors, in addition to relative density, influence seismic compression behavior. To overcome these …
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Stand Strucuture of Planted Stands in Storm-Water Retention Basins
… basal area per hectare, quadratic mean diameter, relative density, average tree height, and percent canopy coverage) as they relate to leaf area index (LAI) and stand age. Simple linear regressions were used to determine relationships for: structure variables with LAI, structure variables with …
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Evaluation of Tensile Properties for Selective Laser Melted 316L Stainless Steel and the Influence of Inherent Process Features
… to validate previous assumptions. Stereological relative density measurements showed that the as-printed material exhibited relative density in excess of 99%. Optical dimensional analysis found that the as-printed tensile specimens met ASTM E8 dimensional requirements in 14 out of 15 parts …
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DEM Study of a Single Stone Column in a Clayey Stratum
… that include: confining stress, particle shape, relative density and particle distribution (gradation). These factors are not directly considered in the design of aggregate columns. However, because the granular material friction angle is a fundamental design parameter used to estimate the …
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Breeding bird communities and habitat selection in the Appalachian Mountains of Southwest Virginia
… oak-pine habitat and 8 in cove hardwood habitat. Relative density and species diversity of the 2 bird communities were essentially the same. Species composition was similar; however, relative dominance structures of the 2 communities were different. The blue-gray gnatcatcher (Polioptila caerulea), …
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A study of direct powder rolling route for CP-titanium
… rolling torque, and produce the highest possible relative density of CP-titanium green strips by optimized rolling variable setups, and to achieve its full density by additional hot deformation processing. In this work, a purpose-built gravity fed vertical powder rolling mill with a roller …
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Densification, microstructure, and mechanical properties of zirconium diboride based ultra-high temperature ceramics
… C after charring. After sintering at 1900⁰C, relative density increased of ~70% for uncoated ZrB₂ to >99% for ZrB₂ coated with at least 1.0 wt% C. Thermodynamic analysis suggested that C reacted with and removed oxide impurities (ZrO₂ and B₂O₃) that were present on the ZrB₂ particle surfaces, …
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Estimation of Predator Densities in Western South Dakota
Evaluation of methods for predator density estimation is necessary to assess biases in techniques and determine those best suited to local conditions. Knowledge of predator populations allow wildlife managers to prescribe and assess management and control activities. Objectives of this study were …
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Experiments on powder metals
… deformation response of powders ranging from a relative density of n = 0.4 - 0.9. A torsion ring shear apparatus has been designed and fabricated to investigate the frictional behavior of iron powder. The torsion ring shear apparatus is also used to examine the important interface frictional …
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