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Garey A. Fox; Lucie Guertault; Celso Castro-Bolinaga; Peter Allen; Kari A. Bigham; Stephane Bonelli; Sherry Lynn Hunt; Kayla Kassa; Eddy J. Langendoen; Erin Porter; Iman Shafii; Tony Wahl; Tess Wynn Thompson
... HighlightsThe JET is a key instrument for in situ and laboratory measurement of soil erodibility.Operation and reporting guidelines are needed to ensure consistency across JETs and applications.JET design improvements and hydrodynamic studies are needed to inform proper analyses and limit operator effects.Erodibility databases should be developed that report JET, soil, and fluid properties. Keywor ...
... Catastrophic landslides with basal shear zones usually involve a number of mechanisms that are poorly understood. One mechanism issue is the transition from slow sliding to fast movement, leading to catastrophic failure. We perform laboratory experiments on landslide shear-zone materials to investigate how rate effects influence the slow-to-fast transition. Two types of ring-shear tests are carrie ...
shearstress, etc ; deformation; models; tongue; viscosity; Show all 5 Subjects
Abstract:
... While perception of high-viscosity solutions (η > 1000 cP) is speculated to be linked to filiform papillae deformation, this has not been demonstrated psychophysically. Presently, just-noticeable-viscosity-difference thresholds were determined using the forced-choice staircase method and high-viscosity solutions (η = 4798–12260 cP) with the hypotheses that the tongue would be chiefly responsible f ...
shearstress, etc ; floodplains; fluid mechanics; hydrology; Show all 4 Subjects
Abstract:
... In this research, the main flow behaviors in the meandering compound channels with different densities of two side blocks on the floodplains were investigated by using laboratory experiments at the three relative depths of 0.29, 0.39 and 0.49 and the corresponding discharges. The results show that the blocks density on the floodplain has a significant effect on the flow behavior in the main channe ...
... Joint properties play a controlling role in the strength of rock mass. In response to the situation that existing researches on bolting mechanism of bolted rock joints principally concentrate on the macroelements, such as rock properties, bolting angle and joint morphology, the direct shear tests on unbolted and single-bolted rock joints under the conditions of different normal stress and differen ...
shearstress, etc ; friction; models; momentum; technology; Show all 5 Subjects
Abstract:
... A better understanding of the interaction between particle and the wall in rotating drums is of great interest. Two Fluid Model (TFM) coupled with kinetic theory of granular flow (KTGF) is used for investigating the wall shear stress of particle phase in a rotating drum. The distribution characteristic of wall shear stress and the effects of operation parameters and contact parameters on wall shea ...
shearstress, etc ; geophysics; granite; research; tectonics; Show all 5 Subjects
Abstract:
... Fluid injection stimulates seismicity far from active tectonic regions. However, the details of how fluids modify on‐fault stresses and initiate seismic events remain poorly understood. We conducted laboratory experiments using a biaxial loading apparatus with a 3 m saw‐cut granite fault and compared events induced at different levels of background shear stress. Water was injected at 10 mL/min and ...
shearstress, etc ; anisotropy; geophysics; isotropy; research; Show all 5 Subjects
Abstract:
... Rocks in the upper mantle are extensively subjected to initial stress. The rock exhibits elastic anisotropy under the deviatoric stress, which affects the seismic response of underground structures. This paper aims to study the effect of stress‐induced anisotropy on the seismic source. The seismic moment tensor generated by a shear faulting in a homogeneous isotropic medium with initial stress is ...
shearstress, etc ; friction; prediction; thermoplastics; viscosity; Show all 5 Subjects
Abstract:
... Excessive ply–ply friction can lead to process-induced defects during the hot press forming of thermoplastic composite laminates. Process simulations can be used to enable first-time-right defect-free manufacturing. However, a good understanding of the ply–ply friction is required to improve the constitutive models to allow simulation of more complex parts. We performed friction experiments on UD ...
shearstress, etc ; basalt; geophysics; heat; models; research; Show all 6 Subjects
Abstract:
... While sliding at seismic slip‐rates of ∼1 m/s, natural faults undergo an abrupt decrease of shear stress called dynamic weakening. Asperity‐scale (<
shearstress, etc ; simulation models; surface area; yams; Show all 4 Subjects
Abstract:
... This paper constructs a discrete element simulation model of yam based on a bimodal model and uniform grid coordinates and performs parameter calibration on the simulation model based on three mechanical properties. The bonding parameters are: normal stiffness per unit area 8.0684 × 10⁷ N·m⁻³, shear stiffness per unit area 2.0314 × 10⁷ N·m⁻³, critical normal stress 1.2876 × 10⁷ Pa and critical she ...
shearstress, etc ; Japan; earthquakes; energy; geophysics; research; Show all 6 Subjects
Abstract:
... In March and May 2021, Mw7.0 and Mw6.7, respectively, deep interplate earthquakes occurred off Miyagi, Japan, near the downdip edge of the rupture area of the 2011 M9 Tohoku earthquake. We study the two Mw ∼ 7 earthquakes to investigate how a great (Mw ∼ 9) earthquake cycle impacts the generation of smaller (Mw7‐8) earthquakes in the deep seismic/aseismic transition zone. Our hypocenter relocation ...
shearstress, etc ; deformation; friction; geometry; shear strength; Show all 5 Subjects
Abstract:
... This study presents a numerical investigation of the shear strength and deformation behaviors of sand-clay interfaces through the distinct element method (DEM). Numerical direct shearing modeling was carried out in PFC2D (particle flow code), considering the effects of the interface geometry, stiffness ratio, friction coefficient, and soil properties. Results indicate that the interface shear stre ...
shearstress, etc ; kinetic energy; models; wind turbines; Show all 4 Subjects
Abstract:
... To evaluate the predictive capability of the actuator disk (AD) models in simulating wakes of different wind turbine designs, we compare the results of the AD simulation with those of the actuator surface (AS) simulation for the EOLOS, NREL and a variant of the NREL (i.e., NREL-V) wind turbine designs. Two types of AD models are considered, i.e., the AD-R and AD-NR models corresponding to the AD m ...
shearstress, etc ; centrifuges; composite polymers; forces; methodology; Show all 5 Subjects
Abstract:
... In this study, a facile method is introduced for fabricating unidirectional block copolymer (BCP) self-assembly patterns induced by centrifugal force. Centrifugal force can be easily applied and manipulated but has never been used to control the orientation of soft matter, including BCP. During centrifugal force-induced self-assembly, the centrifugal force acts as a shear force in the BCP film to ...
shearstress, etc ; dams (hydrology); models; sediments; streams; Show all 5 Subjects
Abstract:
... The objective of this study was to investigate how the earth dam is destroyed due to the effect of upstream and downstream slope of the body in overflow conditions. Therefore, eight models were provided that each model is constructed from the embankment dam with different upstream and downstream slopes (1:1, 2:1) and the soil properties (Sc) on breach formation. The time and method of dam break fo ...
shearstress, etc ; biofilm; biopolymers; environment; microfiltration; ultrafiltration; Show all 6 Subjects
Abstract:
... The implementation of centralized drinking water treatment systems necessitates lower operational costs and improved biopolymer removal during ultrafiltration (UF), which can be afforded by gravity-driven membrane (GDM) filtration. However, prior to implementing GDM filtration in centralized systems, biofilm growth in compacted membrane configurations, such as inside-out hollow fiber (HF), and its ...
shearstress, etc ; friction; modulus of elasticity; technology; Show all 4 Subjects
Abstract:
... Shear cell tests are now commonly applied in particulate calibration procedures for the discrete element method. Usually, only the shear stresses at the shear plane in the particle bed are examined in short-time instances. This work aimed to find the regularities between the internal friction angle, the vertical position of the shear lid, and the rearrangements of particles in the layers during th ...
shearstress, etc ; deformation; isotropy; kinematics; microstructure; models; rheometers; Show all 7 Subjects
Abstract:
... Flow conditions during compression moulding of Sheet Moulding Compounds (SMCs) govern the microstructure and the resulting mechanical properties of composite parts. Low-density and high-fibre content SMCs were subjected to simple compression, œdometric compression and through-thickness shear loadings, using dedicated rheometers. Simple compression and œdometric compression experiments revealed the ...
shearstress, etc ; Reynolds number; sand; turbulent flow; water; Show all 5 Subjects
Abstract:
... In this experimental study, using an ADV, experiments were performed in three different shallow water flows under hydraulically transitional flow condition to estimate the bed shear stress using turbulence characteristics. Vertical distributions of all shear and normal Reynolds stresses as well as TKE were evaluated and simplified in order to estimate bed shear stress under incipient motion of fou ...