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Polycrystal Simulations of Texture Evolution during Deformation Processing

Description: Some recent research on the hot deformation of aluminum alloys has indicated that at elevated temperatures, slip occurs on {110}<110> systems in addition to the usual {111}<110> systems active at lower temperatures. The effect of these additional slip systems on the texture evolution of aluminum single and polycrystals is studied using finite element simulations. The crystals are deformed in plane strain compression, and the constitutive response is modeled using crystal plasticity to track the… more
Date: May 11, 1998
Creator: Radhakrishnan, B.; Sarma, G. & Zacharia, T.
Partner: UNT Libraries Government Documents Department
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The Production of Ceramic Ware by Slip-Casting

Description: This report discusses the production of ceramic ware through the process of slip-casting. The report separately describes the processes of creating zirconia ware, beryllia ware, alundum ware, thoria ware, and specially shaped ceramic ware.
Date: October 20, 1945
Creator: Calderwood, Wayne
Partner: UNT Libraries Government Documents Department
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A Study of Slip Formation in Polycrystalline Aluminum

Description: Note presenting experimental results that shed light on the assumptions that have been made in several attempts to bridge the gap between physical and mathematical theories of plasticity. The experimental results are compatible with, but do not verify, the conception that plastic deformation in strain-hardening materials is primarily due to slip. Results regarding the mechanism of plastic deformation, development of slip in a polycrystal, number of slip systems in operation, and equality of str… more
Date: December 1951
Creator: Johnson, Aldie E., Jr. & Batdorf, S. B.
Partner: UNT Libraries Government Documents Department
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A Mathematical Theory of Plasticity Based on the Concept of Slip

Description: Note presenting a theory of plasticity based on the concept of slip as proposed for the relationship between stress and strain for initially isotropic materials in the strain-hardening range. The theory is an extension to polyaxial stress conditions of the conventional uniaxial stress-strain relation, and time-dependent effects, such as creep and stress relaxation, are not considered.
Date: April 1949
Creator: Batdorf, S. B. & Budiansky, Bernard
Partner: UNT Libraries Government Documents Department
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General Theory of Windmills

Description: In this paper the application of the slip curve method to the design and analysis of windmills is discussed and illustrated by example.
Date: October 1923
Creator: Munk, Max M.
Partner: UNT Libraries Government Documents Department
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The Interpretation of Biaxial-Tension Experiments Involving Constant Stress Ratios

Description: "The slip theory of plasticity is applied to the problem of calculating the strains associated with biaxial tension for the case of constant stress ratios and is found to be in better agreement with experiment than the octahedral-shear and maximum-shear theories usually employed to analyze such data" (p. 1).
Date: February 1950
Creator: Batdorf, S. B.
Partner: UNT Libraries Government Documents Department
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Wind Tunnel Tests on an Airfoil Equipped With a Split Flap and a Slot

Description: "The investigation described in this report is concerned with the changes in the aerodynamic characteristics of an airfoil which are produced by a gauze-covered suction slot, located near the leading edge, and connected by an air passage to a split flap at the trailing edge. The tests were conducted at the Langley Memorial Aeronautical Laboratory. At the larger values of lift coefficient where the action of the slot might be expected to be most effective, the pressure differences were such that… more
Date: October 1929
Creator: Bamber, Millard J.
Partner: UNT Libraries Government Documents Department
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Estimate of Slip Effect on Compressible Laminar-Boundary-Layer Skin Friction

Description: Note presenting a consideration of Rayleigh's problem for a compressible viscous gas, subject to slip at the wall. Expressions for slip velocity and skin friction are derived with the gas temperature at the wall and the product of viscosity times density assumed constant, or nearly so. The results of the solution are interpreted to define the border region between continuum and slip flow and to estimate the effect of slip.
Date: January 1952
Creator: Mirels, Harold
Partner: UNT Libraries Government Documents Department
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Problem of Slip Flow in Aerodynamics

Description: Memorandum presenting a survey of the present status of theory in the field of slip-flow aerodynamics, which leads to the conclusion that the Navier-Stokes equations of motion together with first-order velocity slip and temperature jump at any boundary are sufficient insofar as experimental confirmation is available.
Date: March 4, 1957
Creator: Street, Robert E.
Partner: UNT Libraries Government Documents Department
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A dynamic dispersion insert in the Fermilab Main Injector for momentum collimation

Description: The Fermilab Main Injector (MI) accelerator is designed as a FODO lattice with zero dispersion straight sections. A scheme will be presented that can dynamically alter the dispersion of one of the long straight sections to create a non-zero dispersion straight section suitable for momentum collimation. During the process of slip stacking DC beam is generated which is lost during the first few milliseconds of the ramp. A stationary massive primary collimator/absorber with optional secondary mask… more
Date: June 1, 2007
Creator: Johnson, D. E.
Partner: UNT Libraries Government Documents Department
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6 Batch Injection and Slipped Beam Tune Measurements in Fermilab?s Main Injector

Description: During NOVA operations it is planned to run the Fermilab Recycler in a 12 batch slip stacking mode. In preparation for this, measurements of the tune during a six batch injection and then as the beam is decelerated by changing the RF frequency have been carried out in the Main Injector. The coherent tune shifts due to the changing beam intensity were measured and compared well with the theoretically expected tune shift. The tune shifts due to changing RF frequency, required for slip stacking, a… more
Date: May 1, 2012
Creator: Scott, D. J.; Capista, D.; Kourbanis, I.; Seiya, K. & Yan, M.-J.
Partner: UNT Libraries Government Documents Department
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Comments on the slip factor and the relation Delta phi = -h Delta theta

Description: The definition of the slip factor can be obtained from the phase equation. However, a derivation using the relation {Delta}{phi} = -h{Delta}{theta} leads to a different slip-factor definition. This apparent paradox is examined in detail and resolved. Here {Delta}{phi} is the rf phase difference and {Delta}{theta} is the azimuthal phase difference around the accelerator ring between an off-momentum particle and the synchronous particle, while h is the rf harmonic.
Date: September 1, 2009
Creator: Ng, King-Yuen
Partner: UNT Libraries Government Documents Department
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Modal parameters for a flat plate supported by an oil film.

Description: This paper examines the resonant frequencies, Mode shapes, and damping values for a square plate suppcirted by an oil film. Such a study is motivated by interesl: in oil-supported slip tables used for vibration testing. Rtssonant frequencies and percent critical damping were measured for four cases: plate freely suspended; plate with free end conditions and suppoited by an oil film; plate fixed at several locations; and plate fixed at several locations while supported by an oil film. Analytical… more
Date: January 1, 2003
Creator: Jauhola, A. G. (Andrew G.); Kinzel, E. C. (Edward C.); Reding, D. (Derek) & Hunter, N. F. (Norman F.)
Partner: UNT Libraries Government Documents Department
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Slip stacking experiments at Fermilab main injector

Description: In order to achieve an increase in proton intensity, Fermilab Main Injector will use a stacking process called ''slip stacking''. The intensity will be doubled by injecting one train of bunches at a slightly lower energy, another at a slightly higher energy, then bringing them together for the final capture. Beam studies have started for this process and we have already verified that, at least for a low beam intensity, the stacking procedure works as expected. For high intensity operation, deve… more
Date: June 2, 2003
Creator: al., Kiyomi Koba et
Partner: UNT Libraries Government Documents Department
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Slip stacking

Description: We have started beam studies for ''slip stacking''[1] in the Main Injector in order to increase proton intensity on a target for anti-proton production. It has been verified that the system for slip stacking is working with low intensity beam. For a high intensity operation, we are developing a feedback[2][3] and feedforward system.
Date: September 19, 2002
Creator: Steimel, Kiyomi Koba and James
Partner: UNT Libraries Government Documents Department
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Operating Stresses in Aircraft-Engine Crankshafts and Connecting Rods 1: Slip-Ring and Bush Combinations for Dynamic-Strain Measurements

Description: "Tests were conducted to develop a slip-ring and brush system that will perform satisfactorily in aircraft-engine, dynamic-strain-measuring applications where resistance-wire strain gages are the means of measuring the strain and to correlate the data obtained from tests in order to provide a basis for predicting the performance of similar slip-ring and brush systems operating under conditions similar to those imposed by these tests." 24 combinations of materials were tested dry and 8 were test… more
Date: March 30, 1945
Creator: Dutee, Francis J.; Phillips, Franklyn W. & Kemp, Richard H.
Partner: UNT Libraries Government Documents Department
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Subextensive Scaling in the Athermal, Quasistatic Limit of Amorphous Matter in Plastic Shear Flow

Description: We present the results of numerical simulations of an atomistic system undergoing plastic shear flow in the athermal, quasistatic limit. The system is shown to undergo cascades of local re-arrangements, associated with quadrupolar energy fluctuations, which induce system-spanning events organized into lines of slip oriented along the Bravais axes of the simulation cell. A finite size scaling analysis reveals subextensive scaling of the energy drops and participation numbers, linear in the lengt… more
Date: January 29, 2004
Creator: Maloney, C & Lemaitre, A
Partner: UNT Libraries Government Documents Department
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LDRD LW Project Final Report:Resolving the Earthquake Source Scaling Problem

Description: The scaling behavior of basic earthquake source parameters such as the energy release per unit area of fault slip, quantitatively measured as the apparent stress, is currently in dispute. There are compelling studies that show apparent stress is constant over a wide range of moments (e.g. Choy and Boatwright, 1995; McGarr, 1999; Ide and Beroza, 2001, Ide et al. 2003). Other equally compelling studies find the apparent stress increases with moment (e.g. Kanamori et al., 1993; Abercrombie, 1995; … more
Date: February 10, 2004
Creator: Mayeda, K; Felker, S; Gok, R; O'Boyle, J; Walter, W R & Ruppert, S
Partner: UNT Libraries Government Documents Department
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DISLOCATION MODELS FOR STRENGTHENING IN NANOSTRUCTURED METALLIC MULTI-LAYERS

Description: Ultra-high strength metallic multilayers are ideal for investigating the effects of length scales in plastic deformation of metallic materials. Experiments on model systems show that the strengths of these materials increase with decreasing bilayer period following the Hall-Petch model. However, as the layer thickness is reduced to the nm-scale, the number of dislocations in the pile-up approaches one and the pile-up based Hall-Petch model ceases to apply. For nm-scale semi-coherent multilayers… more
Date: December 1, 2000
Creator: MISRA, A. & HIRTH, J.
Partner: UNT Libraries Government Documents Department
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