The results of the study included the following significant findings: (1) a complete documentation review of all manufacturing processes from the forging of the aluminum 2014-T652 billet through the final nozzle-port machining operation showed that: No failure correlation to specific forging heat lots existed; aluminum alloy met material property specifications; all nozzle-port flanges met drawing requirements; (2) metallurgical analyses of the hand-forged aluminum billets gave evidence of poor...
Topics: DTIC Archive, Covington, W L, HERCULES POWDER CO MAGNA UT CHEMICAL PROPULSION DIV, *THIRD STAGE...
A pressure vessel includes a ported fitting having an annular flange formed on an end thereof and a tank that envelopes the annular flange. A crack arresting barrier is bonded to and forming a lining of the tank within the outer surface thereof. The crack arresting barrier includes a cured resin having a post-curing ductility rating of at least approximately 60% through the cured resin, and further includes randomly-oriented fibers positioned in and throughout the cured resin.
Topics: NASA Technical Reports Server (NTRS), PRESSURE VESSELS, CRACK ARREST, FLANGES, COMPOSITE MATERIALS,...
A saddle clamp assembly is presented. The assembly is comprised of a hollow cylindrical body centered about a longitudinal axis and being diametrically split into semicircular top and bottom sections. Each section has a pair of connection flanges, at opposite ends, that project radially outward. A pair of bolts are retained on the top section flanges and are threadable into nuts retained on the bottom section flanges. A base member is anchored to a central underside portion of the bottom clamp...
Topics: NASA Technical Reports Server (NTRS), BOLTS, CLAMPS, CYLINDRICAL BODIES, FLANGES, TETHERING, TUBES,...
The influence of two-dimensional finite element modeling assumptions on the debonding prediction for skin-stiffener specimens was investigated. Geometrically nonlinear finite element analyses using two-dimensional plane-stress and plane strain elements as well as three different generalized plane strain type approaches were performed. The computed deflections, skin and flange strains, transverse tensile stresses and energy release rates were compared to results obtained from three-dimensional...
Topics: NASA Technical Reports Server (NTRS), FINITE ELEMENT METHOD, TWO DIMENSIONAL MODELS, TENSILE...
A cylindrical shell having a very stiff and plate or a flange is considered. It is assumed that near the end the cylinder contains an axial flaw which may be modeled as a part through surface crack or a through crack. The effect of the end constraining on the stress intensity factor which is the main fracture mechanics parameter is studied. The applied loads acting on the cylinder are assumed to be axisymmetric. Thus the crack problem under consideration is symmetric with respect to the plane...
Topics: NASA Technical Reports Server (NTRS), CYLINDRICAL SHELLS, FLANGES, FRACTURE MECHANICS, RIGID...
Damage mechanisms in composite bonded skin/stringer constructions under uniaxial and biaxial (in-plane/out- of-plane) loading conditions were examined. Specimens consisted of a tapered composite flange bonded onto a composite skin. Tests were performed under monotonic loading conditions in tension, three-point bending, and combined tension/bending . For combined tension/bending testing, a unique servohydraulic load frame was used that was capable of applying both in-plane tension and...
Topics: NASA Technical Reports Server (NTRS), COMPOSITE MATERIALS, STRINGERS, AXIAL LOADS, SKIN (STRUCTURAL...
Photographed on: 10/07/98. -- Wiring carousel and attachment flanges.
Topic: SEMISPAN MODELS -- FLANGES -- WIRING
This is the presentation file for the short course Introduction to Heat Pipes, to be conducted at the 2015 Thermal Fluids and Analysis Workshop, August 3-7, 2015, Silver Spring, Maryland. NCTS 21070-15. Course Description: This course will present operating principles of the heat pipe with emphases on the underlying physical processes and requirements of pressure and energy balance. Performance characterizations and design considerations of the heat pipe will be highlighted. Guidelines for...
Topics: NASA Technical Reports Server (NTRS), HEAT PIPES, TEMPERATURE CONTROL, HEAT TRANSFER, HEAT SOURCES,...
This article presents an overview of current research and material requirements for Metal Matrix Composite (MMC) technologies being developed for application to Liquid Rocket Engines (LIRE). Developments in LRE technology for the US Air Force are being tracked and planned through the Integrated High Payoff Rocket Propulsion Technologies Program (IHPRPT). Current efforts and research requirements for three types of MMC systems are discussed: Aluminum., Copper and Nickel matrix material systems....
Topics: DTIC Archive, Shelley, J S, AIR FORCE RESEARCH LAB EDWARDS AFB CA, *METAL MATRIX COMPOSITES,...
A self-aligning electrical connector device includes a receptacle component having a conically contoured interior and a plug component having a correspondingly contoured conical body receivable in the receptacle component. The plug component has a number of spaced conductive ring elements with a mating face and the receptacle component includes corresponding spaced conductive ring elements providing mating interface with the mating face of the ring elements of the plug component when connected...
Topics: NASA Technical Reports Server (NTRS), ELECTRIC CONNECTORS, ORBITAL SERVICING, SELF ALIGNMENT,...
Photographed on: 10/07/98. -- Wiring carousel and attachment flanges.
Topic: SEMISPAN MODELS -- FLANGES -- WIRING
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Hells Gate Hot Rods have all of your hot rod custom parts and accessories. Their goal is to support do-it-yourself hot rodders with quality products and services that enhance your building experience and save you time and money. exhaust flanges
Topics: exhaust flanges, header flanges
Standard 6061 aluminum I-beams were selectively reinforced on the flanges with single strand T50 graphite/6061 aluminum composite wire reinforcements by utilizing a hot isostatic pressing (HIP) process. Preliminary mechanical hot pressing trials on graphite-aluminum sandwich construction panels were conducted to investigate the effects of both solid and liquid state processing parameters on composite flexural properties. Mechanical test data on these panels indicated that solid state bonding...
Topics: DTIC Archive, Gigerenzer, H, Strempek, G C, FIBER MATERIALS INC BIDDEFORD ME, *ALUMINUM,...
The autoclave based THERM-X(sub R) process was evaluated by cocuring complex curved panels with frames and stiffeners. The process was shown to result in composite parts of high quality with good compaction at sharp radius regions and corners of intersecting parts. The structural properties of the postbuckled panels fabricated were found to be equivalent to those of conventionally tooled hand laid-up parts. Significant savings in bagging time over conventional tooling were documented....
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT CONSTRUCTION MATERIALS, AIRCRAFT STRUCTURES,...
A design and analysis of a repair concept applicable to a stiffened thin-skin composite panel based on the Pultruded Rod Stitched Efficient Unitized Structure is presented. Since the repair concept is a bolted repair using metal components, it can easily be applied in the operational environment. Initial analyses are aimed at validating the finite element modeling approach by comparing with available test data. Once confidence in the analysis approach is established several repair...
Topics: NASA Technical Reports Server (NTRS), COMPOSITE STRUCTURES, DESIGN ANALYSIS, ELASTIC PROPERTIES,...
Elastic-plastic, large-deflection nonlinear thermo-mechanical stress analyses are performed for the Space Shuttle external tank s intertank stringers. Detailed threedimensional finite element models are developed and used to investigate the stringer s elastic-plastic response for different thermal and mechanical loading events from assembly through flight. Assembly strains caused by initial installation on an intertank panel are accounted for in the analyses. Thermal loading due to tanking was...
Topics: NASA Technical Reports Server (NTRS), CRYOGENICS, EXTERNAL TANKS, SPACE SHUTTLES, THERMODYNAMICS,...
Composite skin/stringer flange debond specimens manufactured from composite prepreg containing interleaf layers with a polymer based healing agent encapsulated in thin walled spheres were tested. As a crack develops and grows in the base polymer, the spheres fracture releasing the healing agent. The agent reacts with catalyst and polymerizes healing the crack. In addition, through-thickness reinforcement, in the form of pultruded carbon z-pins were included near the flange tips to improve the...
Topics: NASA Technical Reports Server (NTRS), ENCAPSULATING, COMPOSITE MATERIALS, PREPREGS, CYCLIC LOADS,...
The Redesigned Solid Rocket Motors (RSRM) of the Space Transportation System have three field joints that are protected by the Joint Protection Systems (JPS). The igniter heater was mounted on the igniter flange. This report documents the performance of the JPS and igniter heaters on the pad and the post-flight condition of the JPS components. All observations that were written up as Squawks and/or Problem Reports are also discussed. The primary heaters performed satisfactorily and maintained...
Topics: NASA Technical Reports Server (NTRS), FLANGES, HEATERS, IGNITERS, PERFORMANCE TESTS, PROTECTION,...
CYBEAN (CYlindrical BEaring ANalysis) was created to detail radially loaded, aligned and misaligned cylindrical roller bearing performance under a variety of operating conditions. Emphasis was placed on detailing the effects of high speed, preload and system thermal coupling. Roller tilt, skew, radial, circumferential and axial displacement as well as flange contact were considered. Variable housing and flexible out-of-round outer ring geometries, and both steady state and time transient...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMS, ROLLER BEARINGS, USER MANUALS (COMPUTER...
The leading edges of winged hypersonic aircraft are known to be subjected to intense aerodynamic heating (ref. 1) in flight. Detailed research investigations into specific types of leading edges suitable for hypersonic use have been limited. The heat-sink concept, although excessive in weight and limited to short durations of heating (ref. 2), has been the most widely used type of leading edge for hypersonic application. Limited experimental and analytical work on shell types of leading edges...
Topics: DTIC Archive, Jenkins, Jerald M, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION EDWARDS AFB CA...
Laboratory wave tank tests were conducted to measure and record the horizontal and vertical wave forces on a prototype split pipe with nearly full scale design wave conditions. The ranges of the Reynolds number and the Keulegan-Carpenter number covered are 10,000 to 200,000 and 0 to 40, respectively. The tests are done for three water depths, (4, 6 and 8 feet), three wave periods (2, 4 and 6 sec), four wave heights and four orientations (0, 45, 90 and -45 deg), of the bolting flanges of the...
Topics: DTIC Archive, Yamamoto,Tokuo, OREGON STATE UNIV CORVALLIS WAVE RESEARCH FACILITY, *PIPES, *FLANGES,...
Photographed on: 10/07/98. -- Wiring carousel and attachment flanges.
Topic: SEMISPAN MODELS -- FLANGES -- WIRING
From the bitsavers.org collection, a scanned-in computer-related document. dei :: patents :: 4635155
Topics: tape, cartridge, belt, base, flanges, plate, guide, recessed, portion, magnetic, base plate, side...
Corrosion in the crevices of gasketed joints in the presence of sea- water has been particularly troublesome for the Navy in pipelines. Some of the existing non-destructive techniques can be used without entering the pipeline system but most of them suffer from low signal-to-noise ratios due to spurious signals caused by scattering on rough-pitted surfaces. The main advantages of four-point probe pulsed current resistance measurements, the innovative approach described in this report, are that...
Topics: DTIC Archive, Hodko, D, LYNNTECH INC COLLEGE STATION TX, *PORTABLE EQUIPMENT, *DETECTION,...
It was concluded that thermally activated relaxation of the type customarily encountered at high temperatures was not expected to occur at the low temperatures where long time NERVA storage conditions will prevail. Instances where relaxation occurred by a different mechanism at such moderate temperatures were also reported. Twelve simulated bolted flange test specimens were prepared. Parameters that were varied among the twelve specimens were the flange material, the bolt shank diameter, and...
Topics: NASA Technical Reports Server (NTRS), BOLTS, FLANGES, NUCLEAR ENGINE FOR ROCKET VEHICLES, ROOM...
Analysis of low-profile flange is based on thin shell theory and simple ring theory. Program produces comprehensive design procedure with subsequent stress and deformation analysis. Program was written in FORTRAN IV for UNIVAC 1108 computer.
Topics: NASA Technical Reports Server (NTRS), COMPUTER AIDED DESIGN, COMPUTER PROGRAMS, DEFORMATION,...
Threaded rod, mounted in tubular housing which is flanged and expandable at one end, removes valve lifter after removal of valve covers and push rods.
Topics: NASA Technical Reports Server (NTRS), FLANGES, GROOVES, HOUSINGS, HYDRAULIC EQUIPMENT, INTERNAL...
Description of ion plating process is given. Advantage of this process is that any plating metal or alloy can be selected, whereas, for conventional welding, material selection is limited by compatability.
Topics: NASA Technical Reports Server (NTRS), ALUMINUM, ANODES, ARGON, CATHODES, FLANGES, GAS DISCHARGES,...
Topics: DTIC Archive, GROSS, OLIVER, RAND CORP SANTA MONICA CA, *MATHEMATICAL ANALYSIS, FLANGES, PLASTIC...
The Advanced Thermally Actuated Clearance Control System underwent several studies. Improved flow path isolation quantified what can be gained by making the HPT case nearly adiabatic. The best method of heat transfer was established, and finally two different borrowed air cooling circuits were evaluated to be used for the HPT Active Clearance Control System.
Topics: NASA Technical Reports Server (NTRS), GAS TURBINE ENGINES, ACTUATORS, ACTIVE CONTROL, CONTROL...
A method and apparatus for attaching strain gages to substrates is described. A strain gage having a backing plate is attached to a substrate by using a foil of brazing material between the backing plate and substrate. A pair of electrodes that are connected to a current source, are applied to opposite sides of the backing plate, so that heating of the structure occurs primarily along the relatively highly conductive foil of brazing material. Field installations are facilitated by utilizing a...
Topics: NASA Technical Reports Server (NTRS), MOUNTING, STRAIN GAGES, SUBSTRATES, ELECTRODES, FLANGES,...
A tire and wheel assembly is disclosed in which a low profile pneumatic tire (having sidewalls which deflect inwardly under load) and a wheel (having a rim featuring a narrow central channel and extended rim flanges) form the combination. The extended rim flanges support the tire sidewalls under static and dynamic loading conditions to produce a combination particularly suited to aircraft applications.
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT TIRES, LANDING GEAR, VEHICLE WHEELS, DYNAMIC LOADS,...
The two-axis joint is a mechanical device that provides two-degrees-of-freedom motion between connected components. A compact, moment-resistant, two-axis joint is used to connect an electromechanical actuator to its driven structural members. Due to the requirements of the overall mechanism, the joint has a low profile to fit within the allowable space, low friction, and high moment-reacting capability. The mechanical arrangement of this joint can withstand high moments when loads are applied....
Topics: NASA Technical Reports Server (NTRS), DEGREES OF FREEDOM, ELECTROMECHANICAL DEVICES, FRICTION,...
It has been widely accepted that the phenomenon of time-dependent loosening of flange connections is a strong consequence of the viscous nature of the compression seal material. Characterizing the coupled interaction between gasket creep and elastic bolt stiffness has been useful in predicting conditions that facilitate leakage. Prior advances on this sub-class of bolted joints has lead to the development of (1) constitutive models for elastomerics, (2) initial tightening strategies, (3) etc....
Topics: NASA Technical Reports Server (NTRS), BOLTED JOINTS, CREEP PROPERTIES, FLANGES, TORQUE, MECHANICAL...
A structural optimization procedure is used to determine the shape of an alternate design for the shuttle solid rocket booster field joint. In contrast to the tang and clevis design of the existing joint, this alternate design consists of two flanges bolted together. Configurations with 150 studs of 1 1/8 in. diameter and 135 studs of 1 3/16 in. diameter are considered. Using a nonlinear programming procedure, the joint weight is minimized under constraints on either von Mises or maximum normal...
Topics: NASA Technical Reports Server (NTRS), DESIGN ANALYSIS, JOINTS (JUNCTIONS), NONLINEAR PROGRAMMING,...
Two projects are summarized in this report. The first project is entitled 'Stiffener Crippling Initiated by Delamination', and the second is entitled 'Pressure Pillowing of an Orthogonally Stiffened Cylindrical Shell.' The objective of the first project is to develop a computational model of the stiffener specimens that includes the capability to predict the interlaminar stress response at the flange free edge in postbuckling. The objectives of the second project are to analyze the...
Topics: NASA Technical Reports Server (NTRS), COMPOSITE STRUCTURES, COMPRESSIVE STRENGTH, CYLINDRICAL...
A stemless ball valve comprising: a right flange; left flange; ball with an axis pin and two travel pins; ball seal on either side of the ball; guide sleeve with inner walls comprising two channels; cartridge guide holder; inner magnetic cartridge; and outer magnetic cartridge. The ball is situated inside of the guide sleeve, and a travel pin is located in each of the two channels. The guide sleeve is situated inside of the cartridge guide holder, which is located adjacent to and outside of the...
Topics: NASA Technical Reports Server (NTRS), BALLS, CARTRIDGES, PINS, SLEEVES, VALVES, FLANGES, HOLDERS,...
A detailed study is made of the effects of variations in lamination and material parameters of thin walled composite frames on their vibrational characteristics. The structures considered are semicircular thin walled frames with I and J sections. The flanges and webs of the frames are modeled by using 2-D shell and plate finite elements. A mixed formulation is used with the fundamental unknowns consisting of both the generalized displacements and stress resultants in the frame. The frequencies...
Topics: NASA Technical Reports Server (NTRS), FINITE ELEMENT METHOD, FRAMES, FREE VIBRATION, GRAPHITE-EPOXY...
Photographed on: 10/07/98. -- Wiring carousel and attachment flanges.
Topic: SEMISPAN MODELS -- FLANGES -- WIRING
This paper discusses how fiber orientation of fiber in fiber- reinforced plastics affects automotive applications. Orientation can adversely affect moldings in applications where stress is important, especially in engine components such as front timing covers, pump flanges, oil sump bosses, and crankshaft housing. The paper examines these problems in detail and suggests ways to avert serious difficulties relating to fiber orientation. (AN)
Topics: DTIC Archive, Rowbotham, E. R., SOCIETY OF AUTOMOTIVE ENGINEERS INC WARRENDALE PA, *REINFORCED...
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Apr 4, 2021
04/21
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James Newton (JamesNewton)
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Updated 2017/10/03 to work in Customizer. This OpenSCAD script makes many different types of pulleys for just about any sort of timing belt. This latest version adds support for shafts that have a flat, for multiple nut sizes based on the shaft diameter, adjustable flanges, and for making pulley sets, where the second one is based on a ratio of teeth from the first one. The prior version added support for any number of setscrews and allowed them to be at an angle. The original (By Erik de...
Topics: openscad, stepper_motor, set_screw, useful, timing_belt, 3D, pulley, setscrew, timing_pulley,...
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Jan 16, 2021
01/21
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Maximillian Smith (Gremble)
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EDIT: 4/2/2018 Looking for 'commits' for how far to shorten the length as it doesn't require the entire distance to function. If anyone has a preference let me know, or multiple people so there's some discussion. Sorry for typo, it's flange, not flanger. Subtleties, moving on. Preparations: -Phillips screw driver (try different ones out to see which isn't going to strip your screw. Don't force. The stock [flanges] T8 nut screws are pretty fine and they need a little bit of careful torque to get...
Topics: maker, maker select, z axis, threaded rod, print quality, flanges, monoprice_mod, flange, stl,...
Results include: (1) Third iteration masks designed, layed out and received. Processing was started; (2) New mounting alumina received; (3) Third mounting vacuum flange designed and ordered; and (4) On internal funds, cathodes from LETI procured and evaluated. These results will give direction to this contract.
Topics: DTIC Archive, RAYTHEON CO LEXINGTON MA RESEARCH DIV, *MICROELECTRONICS, REPORTS, VACUUM, COSTS,...
A flextensional underwater acoustic projector, powered by Terfenol-D and operated at a depth of 400 ft (122 m), has been driven to a source level of 212 dB/microPa-m at the Naval Undersea Warfare Centers (NUWO) Seneca Lake Test Facility. The flextensional shell was a modified Class IV shape having concave, rather than convex, radiating surfaces. The geometry of the shell was similar to one described by Merchant U.S. Patent No. 3,258,738, June 28,1966. The shell cross section was circumscribed...
Topics: DTIC Archive, Moffett, Mark B., NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV RI, *ELECTROACOUSTIC...
This report outlines a chemical milling process by which the wall thickness of copper waveguide sections can be reduced to 0.10 mm (0.004 ins). The process permits flange machining and lapping of the relevant component to be completed prior to the reduction of the wall thickness, thereby eliminating the possibility of damage to the fragile section during these operations. (Author)
Topics: DTIC Archive, Harris,N, ROYAL SIGNALS AND RADAR ESTABLISHMENT MALVERN (ENGLAND), *MANUFACTURING,...
This report documents development of energy damping alignment arms for solution of dynamic alignment problems occuring during freight operations at sea using spreader bars for lifting ISO and freight containers. This report considers solutions to the dynamic alignment problem in positioning the spreader bar for lifting ISO and freight containers. Both passive and active systems were considered. Three passive system concepts were evaluated, with conclusions and recommendation for implementation...
Topics: DTIC Archive, Hayes,George H, VSE CORP ALEXANDRIA VA, *ALIGNMENT, *SHIPPING CONTAINERS, *CARGO...
An increased life-of-type requirement for Mirage IIIO aircraft operated by the RAAF was associated with a specific need to develop a refurbishment technique for extending the lives of fatigue-cracked wing main spars. This led to a comprehensive series of flight-by-flight fatigue tests on specimens of a geometry and thickness (32 mm) closely representing the inboard lower rear flange section of the spar. Of the various options investigated, the most promising was the use of interference-fit...
Topics: DTIC Archive, Mann,J Y, AERONAUTICAL RESEARCH LABS MELBOURNE (AUSTRALIA), *WINGS, *BOLTED JOINTS,...
Topics: DTIC Archive, Balland, M, SOCIETE NATIONALE D'ETUDE ET DE CONST DE MOT D'AVI MOISSY-CRAMAYEL...
Unreinforced masonry (URM) buildings constructed on Army installations before the development of modern seismic codes may be susceptible to earthquake damage and therefore could benefit from seismic mitigation measures. Improved understanding of URM structural response under multidirectional loads is required to develop the most effective seismic structural retrofit strategies. This research used a half-scale structural model to investigate the seismic response of URM buildings with flexible...
Topics: DTIC Archive, Sweeney, Steven C, ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION...
The effectiveness of T- and I-section ring stiffeners in axially symmetric shells undergoing axially symmetric deformations is examined under the assumption that the thicknesses of the shell and flanges and web of the stiffeners are small compared to the other dimensions. Curves are presented for obtaining the effective area and the flange stress of T-stiffeners. Approximate formulas for stiffeners with depth of stiffener small compared to the radius of the shell are also presented.
Topics: DTIC Archive, DAVID TAYLOR MODEL BASIN WASHINGTON DC, *DEFORMATION, *SHELLS(STRUCTURAL FORMS),...
