Thematische Bibliographien / Planar Shear

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Auswahl der wissenschaftlichen Literatur zum Thema „Planar Shear“

Autor: Grafiati

Veröffentlicht am 27. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Planar Shear"

Birshtein, Tatyana M., und Ekatarina B. Zhulina. „Shear of a planar polyelectrolyte brush“. Die Makromolekulare Chemie, Theory and Simulations 1, Nr. 4 (Juni 1992): 193–204. http://dx.doi.org/10.1002/mats.1992.040010401.

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Hooshyar, Soroush, und Natalie Germann. „Shear Banding in 4:1 Planar Contraction“. Polymers 11, Nr. 3 (04.03.2019): 417. http://dx.doi.org/10.3390/polym11030417.

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We study shear banding in a planar 4:1 contraction flow using our recently developed two-fluid model for semidilute entangled polymer solutions derived from the generalized bracket approach of nonequilibrium thermodynamics. In our model, the differential velocity between the constituents of the solution allows for coupling between the viscoelastic stress and the polymer concentration. Stress-induced migration is assumed to be the triggering mechanism of shear banding. To solve the benchmark problem, we used the OpenFOAM software package with the viscoelastic solver RheoTool v.2.0. The convection terms are discretized using the high-resolution scheme CUBISTA, and the governing equations are solved using the SIMPLEC algorithm. To enter into the shear banding regime, the uniform velocity at the inlet was gradually increased. The velocity increases after the contraction due to the mass conservation; therefore, shear banding is first observed at the downstream. While the velocity profile in the upstream channel is still parabolic, the corresponding profile changes to plug-like after the contraction. In agreement with experimental data, we found that shear banding competes with flow recirculation. Finally, the profile of the polymer concentration shows a peak in the shear banding regime, which is closer to the center of the channel for larger inlet velocities. Nevertheless, the increase in the polymer concentration in the region of flow recirculation was significantly larger for the inlet velocities studied in this work. With our two-fluid finite-volume solver, localized shear bands in industrial applications can be simulated.

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Craig, I. J. D., und A. N. McClymont. „Shear Wave Dissipation in Planar MagneticX‐Points“. Astrophysical Journal 481, Nr. 2 (Juni 1997): 996–1003. http://dx.doi.org/10.1086/304082.

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Gibson, J. F., und E. Brand. „Spanwise-localized solutions of planar shear flows“. Journal of Fluid Mechanics 745 (17.03.2014): 25–61. http://dx.doi.org/10.1017/jfm.2014.89.

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AbstractWe present several new spanwise-localized equilibrium and travelling-wave solutions of plane Couette and channel flows. The solutions exhibit concentrated regions of vorticity that are centred over low-speed streaks and flanked on either side by high-speed streaks. For several travelling-wave solutions of channel flow, the vortex structures are concentrated near the walls and form particularly isolated and elemental versions of coherent structures in the near-wall region of shear flows. One travelling wave appears to be the invariant solution corresponding to a near-wall coherent structure educed from simulation data by Jeong et al. (J. Fluid Mech., vol. 332, 1997, pp. 185–214) and analysed in terms of transient growth modes of streaky flow by Schoppa & Hussain (J. Fluid Mech., vol. 453, 2002, pp. 57–108). The solutions are constructed by a variety of methods: application of windowing functions to previously known spatially periodic solutions, continuation from plane Couette to channel flow conditions, and from initial guesses obtained from turbulent simulation data. We show how the symmetries of localized solutions derive from the symmetries of their periodic counterparts, analyse the exponential decay of their tails, examine the scale separation and scaling of their streamwise Fourier modes, and show that they develop critical layers for large Reynolds numbers.

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Foss, J. F. „Review vorticity considerations and planar shear layers“. Experimental Thermal and Fluid Science 8, Nr. 3 (April 1994): 260–70. http://dx.doi.org/10.1016/0894-1777(94)90054-x.

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Zhang, Hanlei, Hongchao Kou, Xiaolei Li, Bin Tang und Jinshan Li. „An Atomic Study of Substructures Formed by Shear Transformation in Castγ-TiAl“. Advances in Materials Science and Engineering 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/675963.

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Substructures and microsegregation ofγ/γlaths are analyzed with HRTEM and HAADF-STEM. Results show that the substructures are generated during evolution of shear transformation on the(111-)plane ofγlath. At the beginning, shear transformation evolves in a singleγlath, and a superstructure intrinsic stacking fault (SISF) forms in theγlath. After the formation of the SISF, the shear transformation may evolve in two different ways. If the shear transformation evolves into neighboringγlaths, the SISF also penetrates into neighboringγlaths and a ribbon of SISFs forms. If shear transformation continues to evolve in the original lath, complex substructures begin to form in the original. If shear transformation in the original lath is homogeneous and complete, secondary twin forms which may further grow into twin intersection. Incomplete shear transformation could not form secondary twins but generates a high concentration of planar faults on the(111-)plane. These planar faults may further penetrate theγ/γlath interface, grow into adjacent laths, and form a ribbon of planar faults.

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ARVIDSSON, K. „NON-PLANAR COUPLED SHEAR WALLS IN MULTISTOREY BUILDINGS.“ Proceedings of the Institution of Civil Engineers - Structures and Buildings 122, Nr. 3 (August 1997): 326–33. http://dx.doi.org/10.1680/istbu.1997.29803.

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Geertsema, A. J. „The shear strength of planar joints in mudstone“. International Journal of Rock Mechanics and Mining Sciences 39, Nr. 8 (Dezember 2002): 1045–49. http://dx.doi.org/10.1016/s1365-1609(02)00100-4.

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DERFEL, GRZEGORZ, und DARIUSZ KRZYZANSKI. „Shear flow induced deformations of planar cholesteric layers“. Liquid Crystals 22, Nr. 4 (April 1997): 463–68. http://dx.doi.org/10.1080/026782997209180.

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Luongo, A., G. Rega und F. Vestroni. „On Nonlinear Dynamics of Planar Shear Indeformable Beams“. Journal of Applied Mechanics 53, Nr. 3 (01.09.1986): 619–24. http://dx.doi.org/10.1115/1.3171821.

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The planar forced oscillations of shear indeformabie beams with either movable or immovable supports are studied through a unified approach. An exact nonlinear beam model is referred to and a consistent procedure up to order three nonlinearities is followed. By eliminating the longitudinal displacement component through a constraint condition and assuming one mode, the problem is reduced to one nonlinear differential equation. A perturbational solution in the neighborhood of the resonant frequency is determined and the stability of the steady-state solutions is studied. The dependence of the phenomenon on the geometrical and mechanical characteristics of the system is put into light and the frequency-response curves for different boundary conditions are furnished.

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Dissertationen zum Thema "Planar Shear"

Lucas, Davidson Glenn. „High Frequency Direct Excitation of Small-Scale Motions in Planar Shear Flows“. Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/10579.

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The effect of direct, small-scale excitation on the evolution of a plane shear layer which forms at the edge of a backward facing step is investigated experimentally using high resolution particle image velocimetry and hot-wire anemometry. Actuation is effected at frequencies that are over an order of magnitude higher than the characteristic (or natural) formation frequency of the layer by a spanwise array of piezoelectrically-driven synthetic jet actuators that are placed near the edge of the step. The actuation has significant effects on the evolution of both large- and small-scale motions within the shear layer inducing an increase in small-scale dissipation and simultaneous suppression of turbulence production. While the fundamental instabilities that lead to the formation of large scale motions are typically suppressed, low-frequency amplitude-modulation of the actuation signal allows the formation of large scale motions and entrainment which, in concert with the small-scale actuation, lead to enhancement of the turbulent shear stresses throughout the shear layer. Amplitude modulation is also used to assess the effect of flow transients that are induced by step or low duty cycle actuation. The present findings suggest strategies for controlled suppression or enhancement of mixing in the near field of the shear layer.

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Frascoli, Federico. „Chaotic and rheological properties of liquids under planar shear and elongational flows“. Swinburne Research Bank, 2007. http://hdl.handle.net/1959.3/22416.

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Thesis (PhD) - Swinburne University of Technology, Centre for Molecular Simulation - 2007.
Dissertation submitted in fulfilment of requirements for the degree Doctor of Philosophy, Centre for Molecular Simulation, Faculty of Information and Communication Technologies, Swinburne University of Technology, 2007. Typescript. Includes bibliographical references (p. 151-161).

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Rara, Angela Dominique Sarmiento. „Rolling Shear Strength and Modulus for Various Southeastern US Wood Species using the Two-Plate Shear Test“. Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/104017.

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Cross-Laminated Timber (CLT) is an engineered wood product made by laminating dimensional or structural composite lumber in alternating orthogonal layers. Compared to Canada and Europe, CLT is a novel product to the US. With the additions included in the 2021 International Building Code (IBC), CLT material properties, especially rolling shear, would need to be explored. The increasing demand for softwood lumber, along with the increase of demand of CLT panel production, could place a burden and surpass the domestic softwood supply. Rolling shear is a phenomenon that occurs when the wood fibers in the cross-layers roll over each other because of the shearing forces acting upon a CLT panel when it is loaded out-of-plane. This study used the two-plate shear test from ASTM D2718 to measure the rolling shear properties of various southeastern US wood species: southern pine, yellow-poplar, and soft maple. A secondary study was conducted, using the same two-plate shear test, to measure the rolling shear properties of re-manufactured southern pine for CLT cross-layer application. The soft maple had the greatest average rolling shear strength at 5.93 N/mm2 and southern pine had the lowest average rolling shear strength at 2.51 N/mm2. Using a single factor analysis of variance (ANOVA), the rolling shear strength values from soft maple were significantly greater than yellow-poplar, which was significantly greater than the southern pine. For the rolling shear modulus, the southern pine and soft maple were of equal statistically significant difference, and both were greater statistically significant different compared to the yellow-poplar. The most common failure found from testing was rolling shear.
Master of Science
Cross-Laminated Timber (CLT) is an engineered wood panel product, similar to plywood, constructed with solid-sawn or structural composite lumber in alternating perpendicular layers. The additions included in the incoming 2021 International Building Code (IBC) has placed an importance in expanding the research related to the mechanical and material properties of CLT. Also, with the increasing demand for softwood lumber and CLT panel production, the demand for the domestic softwood lumber could place a burden and surpass the domestic softwood supply. Rolling shear is a failure type that occurs when the wood fibers in the cross-layers roll over each other because of the shearing forces acting upon a CLT panel. This study used the two-plate shear test to measure the rolling shear properties of various southeastern US wood species: southern pine, yellow-poplar, and soft maple. A secondary study was conducted, using the same two-plate shear test, to measure the rolling shear properties of re-manufactured southern pine for CLT cross-layer application. The soft maple had the greatest average rolling shear strength at 5.93 N/mm2 and southern pine had the lowest average rolling shear strength at 2.51 N/mm2. Using a single factor analysis of variance (ANOVA), the rolling shear strength values from soft maple were significantly greater than yellow-poplar, which was significantly greater than the southern pine. For the rolling shear modulus, the southern pine and soft maple were of equal statistically significant difference, and both were greater statistically significant different compared to the yellow-poplar. The most common failure found from testing was rolling shear.

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Papazoglou, Sebastian. „Elucidation of isotropic and anisotropic shear elasticity of in vivo soft tissue using planar magnetic resonance elastography“. Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16136.

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Die Magnetresonanzelastographie (MRE) stellt ein nichtinvasives Verfahren dar, welches die Bestimmung der in vivo Scherelastizität weicher Gewebe ermöglicht. Im Rahmen diese Arbeit wurden Methoden zur Bestimmung isotroper und anisotroper Scherelastizitäten anhand von MRE Wellenbildern entwickelt und evaluiert. Alle in dieser Arbeit vorgestellten Methoden basieren auf planarer MRE, d.h. auf der Aufnahme einer einzelnen Auslenkungskomponente innerhalb der Bildschicht. Dadurch wird die MRE erheblich beschleunigt. Allerdings stellen sich dadurch auch besondere Anforderungen an die Datenauswertung zur Bestimmung aussagekräftiger elastischer Kenngrößen. Anhand von planaren MRE-Experimenten an Gewebephantomen und menschlicher Skelettmuskulatur sowie mittels numerischer Simulation wird gezeigt, dass bei Beachtung weniger experimenteller Randbedingungen und einer darauf abgestimmten Datenauswertung, korrekte Elastizitäten ermittelt werden können. Ein besonderer Schwerpunkt der Arbeit liegt in der Analyse experimenteller Einflüsse wie Bildrauschen und -auflösung auf die ermittelten elastischen Kenngrößen. Des Weiteren werden Methoden zur Bestimmung anisotroper Elastizitäten sowie zur Analyse von Streueffekten im MRE-Wellenbild vorgestellt. Die behandelten Einflüsse auf die Amplituden und Wellenlängen im MRE-Bild, werden vergleichend diskutiert und zusammengefasst, um ein einfaches Verfahrensprotokoll zur Analyse experimenteller in vivo MRE-Daten zu entwickeln. Alle in dieser Arbeit verwendeten Methoden und Programme sind im Anhang zusammengefasst und auf Anforderung erhältlich.
Magnetic resonance elastography (MRE) is a noninvasive method that allows the determination of in vivo shear elasticity of soft tissues. In this thesis methods for the determination of isotropic and anisotropic shear elasticities from MRE wave data were developed and evaluated. All methods presented in this work are based on planar MRE, i.e. they are based on the measurement of a single displacement component in the image plane. This way measurement time in MRE is greatly reduced. However, this imposes specific requirements on data evaluation in order to determine significant elastic constants. On the basis of planar MRE experiments on tissue mimicking gels, human skeletal muscle and numerical simulations it is demonstrated that correct shear elasticities can be determined, taking into account a small set of experimental boundary conditions as well as the employment of complementary data evaluation strategies. This thesis is particularly focussed on the analysis of noise and image resolution on the determined elastic constants. Moreover, methods for determining anisotropic elasticity and analyzing shear wave scattering effects on MRE wave data are introduced. The investigated influences on wave amplitudes and wave lengths are compared and discussed to develop a simple measurement protocol for the evaluation of in vivo MRE data. All methods employed in this work are summarized in the appendix along with the corresponding computer code, which is available on demand.

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Hyensjö, Marko. „Fibre Orientation Modelling Applied to Contracting Flows Related to Papermaking“. Doctoral thesis, KTH, Mekanik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4762.

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The main goal of this work was to develop numerical models for studying the behaviour of fibres in an accelerated flow. This is of special interest for e.g. papermaking. The early stage of the paper manufacturing process determines most of the final properties of a paper sheet. The complexity of studying the flow of fibre suspensions both experimentally and numerically emphasises a need for new ideas and developments. By means of solving the evolution of a convective-dispersion equation, i.e. the Fokker-Planck equation, a fully 3D approach with respect to the position and the two fibre angles, polar and azimuthal angles, following a streamline is presented. As an input to the fibre orientation model the turbulent flow field is solved by Computational Fluid Dynamics (CFD) with second-order closure in the turbulence model. In this work two new hypotheses have been presented for the variation of the non-dimensional rotational diffusivity with non-dimensional fibre length, Lf /η and the Reynolds number based on the Taylor micro-scale of the turbulence, Reλ Parameters for the two new hy- potheses and earlier models are determined with the aim of achieving a general relation and a value of the rotational dispersion coeffcient of stiff fibres in an anisotropic turbulent fluid flow. Earlier modelling work has been focused on solving the planar approach, i.e. assuming all fibres to be in one plane. This planar approach is discussed and compared with the fully 3D approach and its validity is evaluated. The optimization of parameters for the different hypotheses correlated on a central streamline, showed a good agreement with an independent experimental result in the undisturbed region. Moreover, it is particularly interesting that the boundary layer region and the wake region are predicted fairly well and the phenomena are well described, which has not been the case earlier. It seems that the new hypothesis based on the variation of the non-dimensional fibre length, Lf /η gives the best correlation in these shear-layer regions. Further- more it was established that the planar approach fails to predict shear layers, i.e. the boundary layer and the wake regions. As emphasized in the theory section, the planar formulation is strictly valid only if all fibres are oriented in one plane, which is not the case in the shear layers. In the undisturbed region, the 3D and the planar approaches, agree in their results. This leads to the conclusion that both approaches are suitable when shear layers are not studied.
QC 20100812

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Howell, Jaron A. „Distribution of Particle Image Velocimetry (PIV) Errors in a Planar Jet“. DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7004.

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Particle Image Velocimetry (PIV) is an optical fluid measurement technique used to obtain velocity measurements. Two PIV systems were used to capture data simultaneously and measurement error for the MS PIV system is calculated. An investigation of error distribution is performed to determine when uncertainty estimations fail for the CS PIV-UQ method. Investigation of when results from multi pass PIV processing are achieve were performed so that reliable uncertainty estimations are produced with the CS method. An investigation was also performed which determined that error distributions in PIV systems are correlated with flow shear and particle seeding density. Correlation of random errors in space was also performed at the jet core and shear regions of the flow. It was found that in flow regions with large shear that error distributions were non-Gaussian. It was also found in regions of large shear that CS uncertainty results did not match the error. For multi-pass PIV processing with 50% and 75% IW overlap it was found that 4 and 6 passes should be used, respectively, in order for CS uncertainty estimations to be reliable. It was also found that the correlation of random errors in space is much larger in shear regions of the jet flow than in the jet core.

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Vezirov, Tarlan Azad [Verfasser], Sabine [Akademischer Betreuer] Klapp und Michael [Akademischer Betreuer] Zaks. „Non-equilibrium dynamics and feedback control of strongly confined colloidal suspensions in a planar shear flow / Tarlan Azad Vezirov. Gutachter: Sabine Klapp ; Michael Zaks. Betreuer: Sabine Klapp“. Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1075807522/34.

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Heczko, Martin. „Počítačové modelování hranic dvojčatění ve slitinách s tvarovou pamětí“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-416633.

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This Master‘s thesis is focused on theoretical study of twinning in magnetic shape memory alloys based on Ni2MnGa using ab initio calculations of electronic structure within the projector augmented wave method. In particular, the effect of increasing concentration of manganese at the expense of gallium was studied on total energy and stress profiles along different deformation paths in the (10-1)[101] shear system of non-modulated martensite. Further, this work deals with the effect of the concentration of manganese on the energy of planar fault caused by presence of partial dislocation due to motion of twin boundary. The results show that the shear modulus in studied shear system increases with the increasing concentration of manganese as well as energy barrier and deformation characteristics along shear deformation paths increases, which makes the shear more difficult in Mn-rich alloys. Increasing concentration of manganese also leads to rising the planar fault energy. All these effects can be responsible for lower mobility of twin boundaries in alloys with higher concentration of manganese.

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Petersen, Spencer Ray. „A System for Foot Joint Kinetics – Integrating Plantar Pressure/Shear with Multisegment Foot Modeling“. BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8456.

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Introduction: Instrumented gait analysis and inverse dynamics are commonly used in research and clinical practice to calculate lower extremity joint kinetics, such as power and work. However, multisegment foot (MSF) model kinetics have been limited by ground reaction force (GRF) measurements. New technology enables simultaneous capture of plantar pressure and shear stress distributions but has not yet been used with motion capture. Integrating MSF models and pressure/shear measurements will enhance the analysis of foot joint kinetics. The purpose of this study was to develop methodology to integrate these systems, then analyze the effects of speed on foot joint kinetics. Methods: Custom software was developed to synchronize motion capture and pressure/shear data using measured offsets between reference frame origins and time between events. Marker trajectories were used to mask pressure/shear data and construct segment specific GRFs. Inverse dynamics were done in commercial software. Demonstrative data was from 5 healthy adults walking unshod at 3 fixed speeds (1.0, 1.3, and 1.6 m/s, respectively) wearing retroreflective markers according to an MSF model. Plantar shear forces and ankle, midtarsal, and first metatarsophalangeal (MTP) joint kinetics were reported. Speed effects on joint net work were evaluated with a repeated measures ANOVA. Results: Plantar shear forces during stance showed some spreading effects (directionally opposing shear forces) that relatively were unaffected by walking speed. Midtarsal joint power seemed to slightly lag behind the ankle, particularly in late stance. Net work at the ankle (p = 0.024), midtarsal (p = 0.023), and MTP (p = 0.009) joints increased with speed. Conclusions: Functionally, the ankle and midtarsal joints became more motorlike with increasing speed by generating more energy than they absorbed, while the MTP joint became more damperlike by absorbing more energy than it generated. System integration appears to be an overall success. Limitations and suggestions for future work are presented.

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Hosein, Riad. „An investigation of in-shoe plantar pressures and shear stresses with particular reference to diabetic peripheral neuropathy“. Thesis, King's College London (University of London), 1996. https://kclpure.kcl.ac.uk/portal/en/theses/an-investigation-of-inshoe-plantar-pressures-and-shear-stresses-with-particular-reference-to-diabetic-peripheral-neuropathy(b0ebff48-2d9e-4fb7-8730-4ae42704ad0b).html.

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Bücher zum Thema "Planar Shear"

Hanhijarvi, Antti. Computational optimisation of test specimen for planar shear strength tests of wood based panels. Espoo, Finland: VTT, Technical Research Centre of Finland, 1998.

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Oesterle, R. G. Design provisions for tangential shear in containment walls. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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Farrar, C. R. Damping in low-aspect-ratio, reinforced concrete shear walls. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1993.

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Farrar, C. R. Stiffness of low-aspect-ratio, reinforced concrete shear walls. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1993.

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Farrar, C. R. Damping in low-aspect-ratio, reinforced concrete shear walls. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1993.

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Farrar, C. R. Damping in low-aspect-ratio, reinforced concrete shear walls. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1993.

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Farrar, C. R. Experimental assessment of damping in low aspect ratio, reinforced concrete shear wall structure. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1988.

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Séminaire international sur le séchage et sur la valorisation du karité et de l'aiélé (1999 Ngaoundéré, Cameroon). Séminaire international sur le séchage et sur la valorisation du karité et de l'aiélé: Ngaoundéré, Cameroun, 1-3 décembre 1999. [Yaoundé]: Presses universitaires de Yaoundé, 2000.

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A planar reacting shear layer system for the study of fluid dynamics-combustion interaction. [Washington, D.C.]: NASA, 1990.

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Buchteile zum Thema "Planar Shear"

Garzó, Vicente, und Andrés Santos. „Planar Couette Flow in a Mixture“. In Kinetic Theory of Gases in Shear Flows, 271–97. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0291-1_6.

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Garzó, Vicente, und Andrés Santos. „Planar Couette Flow in a Single Gas“. In Kinetic Theory of Gases in Shear Flows, 213–70. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0291-1_5.

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Kosevich, Arnold M., Eugenii S. Syrkin und andre V.Tutov. „Shear Surface Acoustic Waves Localized Near a Planar Defect“. In Acoustical Imaging, 513–17. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4419-8588-0_81.

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Rauch, E. F., und L. Dupuy. „Textural Evolution during Equal Channel Angular Extrusion versus Planar Simple Shear“. In Nanomaterials by Severe Plastic Deformation, 297–302. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527602461.ch5b.

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Delannay, Laurent, Maxime A. Melchior, Anand K. Kanjarla, Paul Van Houtte und Javier W. Signorelli. „CPFEM Investigation of the Effect of Grain Shape on the Planar Anisotropy and the Shear Banding of Textured Metal Sheets“. In Ceramic Transactions Series, 745–56. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470444214.ch79.

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Zolnikov, Konstantin P., Dmitrij S. Kryzhevich und Aleksandr V. Korchuganov. „Regularities of Structural Rearrangements in Single- and Bicrystals Near the Contact Zone“. In Springer Tracts in Mechanical Engineering, 301–22. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60124-9_14.

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AbstractThe chapter is devoted to the analysis of the features of local structural rearrangementsin nanostructured materialsunder shear loadingand nanoindentation. The study was carried out using molecular dynamics-based computer simulation. In particular, we investigated the features of symmetric tilt grain boundary migration in bcc and fcc metals under shear loading. The main emphasis was on identifying atomic mechanisms responsible for the migration of symmetric tilt grain boundaries. We revealed that grain boundaries of this type can move with abnormally high velocities up to several hundred meters per second. The grain boundary velocity depends on the shear rate and grain boundary structure. It is important to note that the migration of grain boundary does not lead to the formation of structural defects. We showed that grain boundary moves in a pronounced jump-like manner as a result of a certain sequence of self-consistent displacements of grain boundary atomic planes and adjacent planes. The number of atomic planes involved in the migration process depends on the structure of the grain boundary. In the case of bcc vanadium, five planes participate in the migration of the Σ5(210)[001] grain boundary, and three planes determine the Σ5(310)[001] grain boundary motion. The Σ5(310)[001] grain boundary in fcc nickel moves as a result of rearrangements of six atomic planes. The stacking order of atomic planes participating in the grain boundary migration can change. A jump-like manner of grain boundary motion may be divided into two stages. The first stage is a long time interval of stress increase during shear loading. The grain boundary is motionless during this period and accumulates elastic strain energy. This is followed by the stage of jump-like grain boundary motion, which results in rapid stress drop. The related study was focused on understanding the atomic rearrangements responsible for the nucleation of plasticity near different crystallographic surfaces of fcc and bcc metals under nanoindentation. We showed that a wedge-shaped region, which consists of atoms with a changed symmetry of the nearest environment, is formed under the indentation of the (001) surface of the copper crystallite. Stacking faults arise in the (111) atomic planes of the contact zone under the indentation of the (011) surface. Their escape on the side free surface leads to a step formation. Indentation of the (111) surface is accompanied by nucleation of partial dislocations in the contact zone subsequent formation of nanotwins. The results of the nanoindentation of bcc iron bicrystal show that the grain boundary prevents the propagation of structural defects nucleated in the contact zone into the neighboring grain.

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Guo, Jinghui, Ali Ersen, Yang Gao, Yu Lin, Latifur Khan und Metin Yavuz. „Prediction of Plantar Shear Stress Distribution by Conditional GAN with Attention Mechanism“. In Medical Image Computing and Computer Assisted Intervention – MICCAI 2020, 770–80. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-59713-9_74.

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Kaufmann, Walter. „Behaviour of Beams in Shear“. In Strength and Deformations of Structural Concrete Subjected to In-Plane Shear and Normal Forces, 95–122. Basel: Birkhäuser Basel, 1998. http://dx.doi.org/10.1007/978-3-0348-7612-4_6.

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Norris, J. E., und J. R. Greenwood. „Review of in situ shear tests on root reinforced soil“. In The Supporting Roots of Trees and Woody Plants: Form, Function and Physiology, 287–94. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-3469-1_28.

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Leckie, F., A. H. Scragg und K. C. Cliffe. „The Effect of Continuous High Shear Stress on Plant Cell Suspension Cultures“. In Progress in Plant Cellular and Molecular Biology, 689–93. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2103-0_103.

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Konferenzberichte zum Thema "Planar Shear"

Mortimer, Bruce J. P., Gary A. Zets, Brian J. Altenbernd und Tharaka Goonetilleke. „Development of a planar shear sensor“. In 2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2016. http://dx.doi.org/10.1109/embc.2016.7591125.

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LAI, H., und M. RAJU. „CFD validation of subsonic turbulent planar shear layers“. In 29th Joint Propulsion Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1773.

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Petel, Oren E., Andrew J. Higgins, Mark Elert, Michael D. Furnish, William W. Anderson, William G. Proud und William T. Butler. „Planar Impact Study of a Shear Thickening Fluid“. In SHOCK COMPRESSION OF CONDENSED MATTER 2009: Proceedings of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2009. http://dx.doi.org/10.1063/1.3295189.

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Urban, William, Shigeya Watanabe und M. Mungal. „Velocity field of the planar shear layer - Compressibility effects“. In 36th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1998. http://dx.doi.org/10.2514/6.1998-697.

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Meyer, Terence, J. Dutton und Robert Lucht. „Turbulent molecular mixing in fully-developed planar shear flows“. In 39th Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-287.

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Kalghatgi, Prasad, Sumanta Acharya, Paul Strykowski und Matt Anderson. „Characteristics of Planar Counter Current Shear Flow in Dump Geometry“. In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63312.

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Countercurrent shear can be used in engineering applications to control flow structure and mixing. In the present paper a planar countercurrent shear flow is studied numerically using Large Eddy Simulation. Mean flow characteristics at a primary-jet Reynolds number of 14700 are studied for three values of a key parameter, the secondary to primary jet mass flow ratio (m˙s/m˙p), chosen to match reported measurements. The predicted flow results of time averaged flow field, Strouhal number and turbulence characteristics are compared with the experimentally available data. A change in instability modes is observed at mass flow ratios above m˙s/m˙p = 0.27 with more than 100% increase in the turbulence levels and distinct changes in spectral characteristics. Detailed spectral records along with landau modeling are used as evidence of existence of self excited global mode beyond a critical velocity ratio in the flow.

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Calhoon, William. „HEAT RELEASE AND COMPRESSIBILITY EFFECTS ON PLANAR SHEAR LAYER DEVELOPMENT“. In 41st Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1273.

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Bertsch, Rebecca L., Divya Sri Praturi und Sharath S. Girimaji. „Effect of compressibility on inhomogeneous planar shear flows: Stabilizing mechanisms“. In THMT-18. Turbulence Heat and Mass Transfer 9 Proceedings of the Ninth International Symposium On Turbulence Heat and Mass Transfer. Connecticut: Begellhouse, 2018. http://dx.doi.org/10.1615/thmt-18.300.

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Cizelj, Leon, und Igor Simonovski. „Simulated Planar Polycrystalls With Planar and Spatial Random Lattice Orientations“. In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59533.

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A planar multiscale model of a polycrystalline aggregate was employed in this paper to arrive at new and interesting results. The model accounted for the most important mesoscopic features including explicitly modeled random grain structure with crystal grains represented as randomly oriented monocrystals obeying anisotropic elasticity and crystal plasticity (Schmid resolved shear stress) constitutive models. The results presented include the illustrative description of simulated mesoscopic strain fields, including the development of shear bands, and a sensitivity analysis of the equivalent macroscopic response at various sizes of polycristalls smaller than Representative Volume Element (RVE). Columnar grain structure is assumed in a planar (plane strain) finite element model. The presentation of results includes the comparison of aggregate responses obtained assuming 2-D only and full 3-D random grain orientations. The material properties have been chosen to represent the German nuclear reactor pressure vessel steel 22 NiMoCr 3 7.

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Shen, Qing, Fenggan Zhuang, Faming Guan, Qiang Wang und Xiangjiang Yuan. „Numerical Simulation on a Planar Supersonic Free Shear Layer Secondary Instability“. In 3rd AIAA Flow Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-3351.

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Berichte der Organisationen zum Thema "Planar Shear"

Lovell, Alexis, Garrett Hoch, Christopher Donnelly, Jordan Hodge, Robert Haehnel und Emily Asenath-Smith. Shear and tensile delamination of ice from surfaces : The Ice Adhesion Peel Test (IAPT). Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41781.

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For decades, researchers have sought to understand the adhesion of ice to surfaces so that low-cost ice mitigation strategies can be developed. Presently, the field of ice adhesion is still without formal standards for performing ice adhesion tests. The U.S. Army Corps Engineers’ Research and Development Center’s Cold Regions Research and Engineering Laboratory (ERDC-CRREL) has a longstanding history as an independent third party for ice adhesion testing services. Most notably, CRREL’s Zero-Degree Cone Test (ZDCT) has been an industry favorite for more than 30 years. Despite its wide acceptance, the ZDCT contains some shortcomings, namely that freshwater ice is formed on the surface of interest within the confines of an annular gap. To address this limitation, CRREL developed and uses the Ice Adhesion Peel Test (IAPT) for testing ice adhesion. This test employs an open planar substrate from which the ice can be removed under either tensile or shear loading, thereby allowing ice to be grown directly on the target substrate without the use of molds. The IAPT configuration is therefore amenable to different ice types and geometries and will provide utility to research studies that aim to develop surface treatments to mitigate ice in a wide range of environments. This report describes the IAPT and its use for characterizing the ice adhesion properties of materials.

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Conley, A. J. Centrifugal destabilization and restabilization of plane shear flows. Office of Scientific and Technical Information (OSTI), August 1997. http://dx.doi.org/10.2172/522751.

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Glezer, Ari, und Frank H. Champagne. Real-Time Adaptive Control of Mixing in a Plane Shear Layer. Fort Belvoir, VA: Defense Technical Information Center, Dezember 1993. http://dx.doi.org/10.21236/ada285541.

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Hiller, S. W. Open test assembly (OTA) shear demonstration testing work/test plan. Office of Scientific and Technical Information (OSTI), Juli 1998. http://dx.doi.org/10.2172/345055.

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Brodsky, N. S. Hydrostatic and shear consolidation tests with permeability measurements on Waste Isolation Pilot Plant crushed salt. Office of Scientific and Technical Information (OSTI), März 1994. http://dx.doi.org/10.2172/10142397.

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Klamerus, E. W., M. P. Bohn, J. J. Johnson, A. P. Asfura und D. J. Doyle. Assessment of the impact of degraded shear wall stiffnesses on seismic plant risk and seismic design loads. Office of Scientific and Technical Information (OSTI), Februar 1994. http://dx.doi.org/10.2172/10134778.

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Herrmann, J. M., und J. R. Walton. On the Energy Release Rate for Dynamic Transient Anti-Plane Shear Crack Propagation in a General Linear Viscoelastic Body. Fort Belvoir, VA: Defense Technical Information Center, September 1988. http://dx.doi.org/10.21236/ada202942.

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Elbring, G. J., und S. M. Narbutovskih. Integrated test plan for crosswell compressional and shear wave seismic tomography for site characterization at the VOC Arid Site. Office of Scientific and Technical Information (OSTI), Februar 1994. http://dx.doi.org/10.2172/10126402.

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Schovanec, L., und J. R. Walton. On the Order of the Stress Singularity for an Anti-Plane Shear Crack at the Interface of Two Bonded Inhomogeneous Elastic Materials. Fort Belvoir, VA: Defense Technical Information Center, November 1986. http://dx.doi.org/10.21236/ada175139.

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Redpath, Bruce B. Downhole Measurements of Shear- and Compression-Wave Velocities in Boreholes C4993, C4996, C4997 and C4998 at the Waste Treatment Plant DOE Hanford Site. Office of Scientific and Technical Information (OSTI), April 2007. http://dx.doi.org/10.2172/912735.

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