| Influence of End Restraint in Cyclic Triaxial Tests. |
MAR 1976 |
|
| Authors:
Kenneth L. Lee; CALIFORNIA UNIV LOS ANGELES DEPT OF MECHANICS AND STRUCTURES
|
 | Theoretical considerations concerning the effect of end restraint on the strength of soil in triaxial tests are briefly discussed herein. The theoretical aspects are supplemented by a review of all laboratory tests data available to the writer. Most of the data pertain to static drained tests on sands. There are also data from static undrained tests on saturated clays. A lesser amount of previously unpublished data from the writer's files ... |
|
| Advanced Compressor Seal for Turbine Engines. |
10 FEB 1976 |
|
| Authors:
Anthony J. Smalley; Peter R. Albrecht; MECHANICAL TECHNOLOGY INC LATHAM N Y
|
| This report describes a resilient seal concept entitled the J-Seal. This concept uses a pressure loaded membrane and hydrostatic bearing principles to maintain a minimum rotor stator clearance over a range of axial rotor displacement. Methods of analyzing this concept have been developed. A design study is presented and hardware has been fabricated. Manufacturing inadequacies in a key component caused proof of concept testing to be inconclusive, but an adequate ... |
|
| Static and Dynamic Testing of an Axle Shored MHU-12/M Trailer. |
FEB 1976 |
|
| Authors:
Grant W. Gray; AIR FORCE SPECIAL WEAPONS CENTER KIRTLAND AFB N MEX
|
| An MHU-12/M Munitions Handling Trailer, loaded with two BDU-8 weapon shapes, was subjected to simulated inertial load tests and vibration tests in the 1 to 20 Hertz range. The trailer, tied to a simulated aircraft deck with 10,000 pound rated chains and MB-1 tiedown devices, was tested without shoring and with shoring in several locations to provide data on the effectiveness of the shoring. Data on tiedown chain reaction loads ... |
|
| Static and Dynamic Testing of an Axle Shored MHU-141/M Trailer. |
FEB 1976 |
141 pages |
| Authors:
Grant W. Gray; AIR FORCE SPECIAL WEAPONS CENTER KIRTLAND AFB N MEX
|
 | An MHU-141/M Munitions Handling Trailer, loaded with two AGM-69 SRAM missile shapes on MHU-71/E Munitions Handling Rail Sets, was subjected to simulated inertial load tests and vibration tests in the 1 to 20 Hertz range. The trailer, tied down to simulated aircraft deck with 10,000-pound rated chains and MB-1 tiedown devices, was tested with and without shoring to provide data on the effectiveness of the shoring. Data on tiedown chain ... |
|
| Plastic Piezoids for Fuze Applications, |
1976 |
|
| Authors:
Eugene L. Church; Howard A. Jenkinson; Robert J. Esposito; FRANKFORD ARSENAL PHILADELPHIA PA PITMAN-DUNN RESEARCH LABS
|
| The purpose of this report is to present preliminary results on the piezoelectric activity of PVF2 (Polyvinylidene Fluoride) devices in both quasi-static and reverse ballistic environments in order to assess their device potential for fuzing circuits. Other military applications will also be discussed. |
|
| Preliminary Evaluation of the Acute Toxicity of Desensitized Primer Compounds and Primer Waste Effluents to Representative Aquatic Organisims. |
NOV 1975 |
35 pages |
| Authors:
R. E. Bentley; B. H. Sleight III; K. J. Macek; EG AND G BIONOMICS WAREHAM MASS
|
| The acute toxicity of five desensitized primer compounds and primer manufacturing waste effluents to three freshwater species, Daphnia magna (water flea: crustacean), Lepomis macrochirus (bluegill:fish) and Pimephales promelas (fathead minnow:fish) was determined in static bioassays. The primers tested were trinitroresorcinol (TNR) styphnic acid, lead styphnate (PbTNR), tetracene, pentaerythritol tetranitrate (PETN) and FA 956 priming mixture. The waste effluents were those resulting from the production of TNR, PbTNR, tetracene and FA ... |
|
| Minuteman Stage III Materials and Components Program. Hydroburst Fleet Motor No. 32054 Case. |
15 OCT 1975 |
|
| Authors:
HERCULES INC MAGNA UTAH BACCHUS WORKS
|
| This report presents the results of a hydroburst test of a Minuteman Stage 3 motor. This test was the second hydroburst of a fired case. |
|
| Axial-Centrifugal Compressor Program |
OCT 1975 |
275 pages |
| Authors:
Lawrence W. Blair; David J. Tapparo; GENERAL ELECTRIC CO LYNN MA AIRCRAFT ENGINE BUSINESS GROUP
|
| This report presents the component test results and analysis for Phases 3, 4 and 5 of the 5-lb/sec axial-centrifugal compressor. Separate component tests were carried out to evaluate the two-stage axial compressor, the centrifugal compressor, and the combined axial-centrifugal compressor. Additional static blow tests were also conducted on the axial and centrifugal stage inlet guide vanes to determine their performance characteristics. The assembly procedure, buildup clearances, and test procedure are ... |
|
| Fluids, Lubricants, Fuels and Related Materials. Part II. |
OCT 1975 |
|
| Authors:
E. Erwin Klaus; Elmer J. Tewksbury; Bernard Y. C. So ; Steven M. Hsu; PENNSYLVANIA STATE UNIV UNIVERSITY PARK PETROLEUM REFINING LAB
|
| A diffusion effect at the gas liquid interface during the determination of pressure viscosity values in a capillary instrument is shown to be a problem. A method to minimize the effects of gas diffusion is proposed. Pressure coefficients for fluids such as mineral oils, 'dumbbell' blends of mineral oil fractions, and paraffinic resin-solvent blends are shown to be independent of pressure at pressures up to at least 3000 lb per ... |
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| Static and Fatigue Damage Characterization in Composite Materials. |
AUG 1975 |
|
| Authors:
Joseph J. Nevadunsky; C. J. Matusovich; John J. Lucas; UNITED TECHNOLOGIES CORP STRATFORD CONN SIKORSKY AIRCRAFT DIV
|
| The purpose of the investigation was to characterize two composite laminates. This was accomplished by identifying static and fatigue modes present within the laminates by fractographic and non-destructive tests methods and relating them to stiffness loss. Torsional and axial modulus measurements were employed to quantitatively characterize the materials. Microscopic examinations, both visual and SEM were used to destructively evaluate the failure mechanisms present at various stages of static and fatigue ... |
|
| Ejection Tests of the B61 Weapon from the Lockheed F-104G Centerline Rack. |
AUG 1975 |
|
| Authors:
Grant W. Gray; AIR FORCE SPECIAL WEAPONS CENTER KIRTLAND AFB N MEX
|
| A total of 34 static test firings were made with combinations of Mk 2, Mk 9, and ARD 446 cartridges in the Lockheed F-104G centerline rack ejecting a B61 weapon shape. The rack was tested with the ejector pistons in the standard positions: 0.154-inch diameter orifice forward and 0.188-inch diameter orifice aft, and with the pistons reversed. The rack was also tested using the original slave piston and seals, and ... |
|
| Flexure Fracture of Graphite-Epoxy. |
JUL 1975 |
|
| Authors:
W. S. De Rosset; BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD
|
| Panels of graphite-epoxy composite (Thornel 300 fibers in Fiberite 934 resin) have been statically tested in a flexure device designed to avoid stress concentrations associated with the loading. Measurements were made on the strain to fracture and compared with dynamic test results obtained from work conducted at the Ballistic Research Laboratories Shock Tube Facility. No significant differences in the strain-to-fracture measurements were observed between the static and dynamic tests. Comparison ... |
|
| Collapse Strength of a Two-Way-Reinforced Concrete Slab Contained within a Steel Frame Structure. |
JUN 1975 |
|
| Authors:
William L. Huff; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
|
| The objective of the study reported herein was to determine the response, up to collapse, of a conventional floor and framing system typical of the systems which would be located over a basement fallout shelter in a steel frame building. Static and dynamic tests were conducted on two 1/4.5-scale models of the basement shelter area from a multistory steel frame prototype structure designed for this study. |
|
| F-4 Beryllium Rudders; A Precis of the Design, Fabrication, Ground and Flight Test Demonstrations. |
MAY 1975 |
|
| Authors:
Frank E. Barnett; AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH
|
| This report contains a summary of the total effort expended to design, fabricate, qualify and demonstrate by actual flight tests an aircraft structural component constructed of beryllium. The low density and high modulus of this metal is unmatched by any alloy making it particularly attractive for applications where weight and stiffness are critical. Limited ductility does put a premium on proper design and fabrication techniques. One F-4 beryllium rudder, produced ... |
|
| 737 Graphite Composite Flight Spoiler Flight Service Evaluation |
MAY 75 |
40 pages |
| Authors:
Robert L. Stoecklin; BOEING COMMERCIAL AIRPLANE CO SEATTLE WA
|
| This flight service report was prepared in compliance with the requirements of contract NAS1-11668 and covers the flight service experience of 108 graphite-epoxy spoilers on 737 transport aircraft and related ground-based environmental exposure of graphite-epoxy material specimens for the period from July 1973 through March 1975. Four spoilers have been installed on each of 27 aircraft representing six major airlines operating throughout the world. A flight service evaluation program of ... |
|
| Performance Evaluation of Velocity Measurement Systems. |
APR 1975 |
|
| Authors:
Stephen F. Pickett; Adalbert J. Smiel; NEW MEXICO UNIV ALBUQUERQUE ERIC H WANG CIVIL ENGINEERING RESEARCH FACILITY
|
| Performance evaluations of velocity measurement systems from 6 manufacturers were made at this research facility (CERF). These systems, which consisted of both linear and pendulous transducers and associated signal conditioners were tested on the CERF drop tower for dynamic inputs to the vertical systems and on the CERF sled track for dynamic inputs to the horizontal systems. Dynamic transducer inputs were used to obtain data for evaluating upper frequency limits, ... |
|
| Physical Property Tests of Rock Cores From the MIXED COMPANY Event III Site. |
APR 1975 |
|
| Authors:
Richard L. Stowe; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
|
| Static material property tests were conducted on selected rock cores, predominantly sandstone, taken from the MIXED COMPANY Event 3 test site. The results of these tests along with other static and dynamic tests results were used in the development of representative constitutive properties used in preshot ground motion calculations for Event 3. Natural densities ranged from 2.18 to 2.62 g/cc, and moisture contents ranged from 0.6 to 6.2 percent. Tensile ... |
|
| Concepts in Safety Belt Testing. |
APR 1975 |
|
| Authors:
James W. Ross Jr; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OKLA FLIGHT STANDARDS TECHNICAL DIV
|
| The purpose of the paper is to present concepts for more representative testing of inertia reels and shoulder harness assemblies. These concepts were explored as part of a study to determine design and performance criteria appropriate for civil aircraft safety belts. |
|
| Static and Cyclic Creep Properties of Ti-6Al-4V for Several Heat Treatments. |
APR 1975 |
|
| Authors:
Charles M. Gilmore; M. Ashraf Imam; GEORGE WASHINGTON UNIV WASHINGTON D C INST FOR THE STUDY OF FATIGUE FRACTURE AND STRUCTURAL RELIABILITY
|
| The room temperature static and 'cyclic' creep properties were determined for Ti-6Al-4V in three anneal conditions (alpha beta) anneal, beta anneal and recrystallized anneal). The static and 'cyclic' creep strains were inversely related to microstructure. The beta annealed alloy has the smallest static creep strain and the largest 'cyclic creep' strain; the recrystallized anneal alloy has the largest static creep and the smallest 'cyclic creep.' This behaviour indicates that static ... |
|
| SST Technology Follow-On Program-Phase II, Noise Suppressor/Nozzle Development. Volume II. Noise Technology. |
MAR 1975 |
|
| Authors:
J. Atvars; C. P. Wright; C. D. Simcox; BOEING COMMERCIAL AIRPLANE CO SEATTLE WA
|
| Jet noise suppression, a major problem in the development of quiet airplane systems, has experienced a substantial technology advance as described in this report. Fundamental technology development has led to a better understanding of nozzle aerodynamics, noise generation and noise transmission processes. This report describes the results of a systematic, model-scale, multitube nozzle test program which generated far-field jet noise data, jet noise source location data, flow-profile data and jet ... |
|
| SST Technology Follow-On Program - Phase II. Noise Suppressor/Nozzle Development. Volume X. Advanced Suppressor Concepts and Full Scale Tests. |
MAR 1975 |
|
| Authors:
R. S. Armstrong; J. Atvars; C. R. Fullerton; C. P. Wright; BOEING COMMERCIAL AIRPLANE CO SEATTLE WA
|
| The goal of this program was to develop and demonstrate an engine exhaust system suitable for use on a commercial supersonic transport which would allow the airplane to meet FAR Part 36 takeoff and sideline noise requirements. A series of model-scale jet noise suppressor test programs and a design feasibility study were conducted to identify the exhaust system design which would meet this goal. A model-scale test and a full-scale ... |
|
| Facilities and Capabilities. |
MAR 1975 |
|
| Authors:
ARMY MISSILE COMMAND REDSTONE ARSENAL ALA TEST AND EVALUATION DIRECTORATE
|
| This brochure describes the facilities and services available in the Test and Evaluation Directorate located at Redstone Arsenal, Alabama. The Directorate complex is unique in that it can provide complete flight, static, and environmental tests on inert or explosive materiel. Support services include instrumentation, shops, and photographic laboratory equipment. |
|
| Investigation of Kevlar Fiber Cables for Use in ASW Sonobuoys, |
20 JAN 1975 |
26 pages |
| Authors:
John P. Brett; Roger A. Holler; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AERO-ELECTRONIC TECHNOLOGY DEPT
|
| The initial phase of an investigation of kevlar fibers for application in ASW sonobuoy cables has been completed. The tensile and elongation properties of kevlar have been shown to be comparable to steel, and electro-mechanical cables constructed of kevlar have been shown to perform better than equivalent size steel cables. Further investigation to optimize the use of kevlar and to assure consistent results under rigorous testing is planned. |
|
| On the Accuracy of Flechettes by Dynamic Wind Tunnel Tests, by Theory and Analysis, and by Actual Firings |
JAN 1975 |
364 pages |
| Authors:
J. D. Nicolaides; C. W. Ingram; L. E. Lijewski; M. J. Garsik; NOTRE DAME UNIV IN
|
| The accuracy and dispersion of flechettes are investigated by: (1) An exploratory firing program; (2) A supersonic dynamic testing wind tunnel program; (3) Development of a theory for jump and dispersion for computer computation and analysis; and (4) Precision range firings at this Arsenal. The exploratory firing program reveals the importance of fin and body damage, the blast region, and saboting. The dynamic wind tunnel program yields the static and ... |
|
| Design, Fabrication and Test of Multi-Fiber Laminates |
JAN 75 |
191 pages |
| Authors:
R. A. Pike; R. C. Novak; UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CT
|
| The objective of the program is to design, fabricate, and test unidirectional and angleply multi-fiber laminates for improved impact strength and other mechanical properties. The effects of several variables on the mechanical properties of epoxy matrix materials are described. These include fiber type (HMS and AS graphites, glass, and Kevlar 49), ratio of primary to hybridizing fiber and hybrid configuration. It is demonstrated that AS graphite/ S-glass in an intraply ... |
|
| Static and Dynamic Fatigue Tests on Carbon Fibre Type 2 Manufactured by Morganite Modmor Limited |
OCT 74 |
19 pages |
| Authors:
W. J. Parnell; BRISTOL COMPOSITE MATERIALS ENGINEERING LTD (UNITED KINGDOM)
|
| A study has been made of the application of fibre reinforced composite materials to the construction of a lightweight, long life, high pressure, gas storage vessel for satellite attitude control systems. The operational requirements demand good dynamic fatigue, long term pressure holding capability with negligible leakage and compatibility with a wide range of media. These requirements can be met by the use of composite materials manufactured from the recently introduced ... |
|
| A Dynamic Photoelastic Analysis of Dynamic Tear Test Specimen. |
OCT 1974 |
|
| Authors:
A. S. Kobayashi; C. F. Chan; WASHINGTON UNIV SEATTLE DEPT OF MECHANICAL ENGINEERING
|
| Dynamic photoelasticity was used to analyze the transient response of Dynamic Tear Test (DDT) specimens, machined from .0095m (3/8 in.) thich Homalite-100 plates. Dynamic stress intensity factors, dynamic strain energy release rates, and crack velocities in ten specimens were determined. Dynamic tear energies were obtained by integrating the area under the dynamic strain energy release rate curves. The average dynamic strain energy release rates which were obtained by dividing the ... |
|
| The Toughness of High Hardness Laminar Composite Steel as Influenced by Specimen and Crack Orientation. |
AUG 1974 |
|
| Authors:
Peter T. Lum; Richard Chait; Charles F. Hickey Jr; ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
|
| The purpose of the present paper is to extend the study of high hardness laminar composite steel and establish the orientation influence using static and dynamic toughness measurements. The toughness behavior of high hardness laminar composite steel (high carbon, approximately Rc 60, hard layer metallurgically bonded to a medium carbon, approximately Rc 50, softer layer) was investigated. The effort focused on the effect of test temperature, specimen orientation, and crack ... |
|
| Structural Evaluation of UH-1D Tubular Rotor Blade. |
AUG 1974 |
|
| Authors:
Don Cook; FIBER SCIENCE INC GARDENA CALIF
|
| The report describes the evaluation to determine the effects of static loading, cyclic loading and ballistic damage/repairs on the stiffness and resonant behavior of three full-scale, filament-wound tubular- reinforced UH-1D main rotor blades. Blades tested were fabricated from glass fiber and Kevlar 49. Detailed test results are provided which reflect the suitability of the tubular design for rotor blades. (Author, modified-PL) |
|
| A Survey of Techniques for the Analysis and Design of Submerged Mooring Systems. |
AUG 1974 |
|
| Authors:
N. D. Albertsen; CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF
|
| Techniques useful for the design and analysis of moored cable systems are presented. Included are compilations of information describing computer programs for steady-state and dynamic analyses and method for the analysis and suppression of cable strumming. It was found that the steady-state analysis of complex redundant structures and the dynamic analysis of simple structures are now possible. However, experimental data are required to validate the analysis procedures and related computer ... |
|
| Quasi-Static Compression Stress-Strain Curves-I, Data Gathering and Reduction Procedures; Results for 1066 Steel. |
JUL 1974 |
|
| Authors:
E. A. Murray Jr.; J. H. Suckling; ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| As part of the Core Materials Program investigating kinetic energy armor penetrators and armor materials, this report presents the results of quasistatic compression tests run on 1066 steel specimens at hardnesses of 28, 40, and 54 on the Rockwell C scale. The yield strength, Poisson's ratio, and Young's modulus are reported for each hardness. (Author) |
|
| Static Testing of Reinforced Plastics: A Reference Manual (Introduction and Chapter VI). |
28 JUN 1974 |
|
| Authors:
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
|
|
| Investigation of Stress Concentration in Reinforced Concrete Components. |
JUN 1974 |
|
| Authors:
T. E. Glynn; M. Z. Al-Salihi; TRINITY COLL DUBLIN (IRELAND) SCHOOL OF ENGINEERING
|
| This report is a continuation of the former efforts to elucidate the behavior of ferrocement concrete in static and dynamic stress fields. The influence of various reinforcements on pre and post cracking of thin sections forms the main topic of this report. The objects of the testing program were to compare the effectiveness of various steel mesh configurations in arresting crack propagation in stressed members; to provide experimental data for ... |
|
| Instrumentation for Fracture Toughness Evaluation with Charpy Impact Specimen. |
JUN 1974 |
|
| Authors:
Clarence J. Carter; John J. Connelly; Raymond A. Cellitti; INTERNATIONAL HARVESTER CO HINSDALE ILL MFG SERVICES
|
| An instrumented impact test system comprised of analog circuits was designed, assembled and tested. The system is capable of furnishing a digital display of static and dynamic fracture toughness, impact energy and time to fracture along with a hard copy print-out and oscilloscope presentation of the forcetime trace. The computation circuits are described along with operation procedures and principal logic inputs. (Author) |
|
| The Strain Rate Dependence of Three High Strength Naval Alloys. |
JUN 1974 |
|
| Authors:
Andrew F. Conn; S. Lee Rudy; Stephen C. Howard; HYDRONAUTICS INC LAUREL MD
|
| The properties of three alloys were studied: a Type HY-80 steel, a Type HY-130 steel, and a titanium alloy: Ti-6211. (6Al 1Nb 0.8Mo 1Ta). These materials were subjected to a wide range of uniaxial tensile rates of straining at room temperature: static tests, rapid loading tests, and dynamic tests. The results of these tests are replotted to demonstrate the dependence of stress as a function of rate of straining. It ... |
|
| Experimental Evaluation of a Reliability Assessment Model for Adhesively Bonded Joints. |
JUN 1974 |
88 pages |
| Authors:
Alan P. Berens; Paul E. Johnson; Blaine S. West; DAYTON UNIV OHIO RESEARCH INST
|
| Adhesively bonded joints were failed statically and in fatigue to test the validity of a fatigue life assessment model. The results of the tests were in agreement with both the assumptions and the predictions of the model. In particular, the failure mode was constant for all tests and the observed static strength and fatigue lives were adequately modeled by the Weibull family of distributions with constant, but different, shape parameters ... |
|
| High Acceleration Cockpits for Advanced Fighter Aircraft Volume I. Program Summary. |
MAY 1974 |
|
| Authors:
James M. Sinnett; MCDONNELL DOUGLAS CORP ST LOUIS MO
|
| A high acceleration cockpit design integration program was conducted for an advanced fighter concept with direct lift and direct side force capabilities. Program efforts included an assessment of basic pilot tasks in fighter mission, using the configuration direct force and high acceleration design features. Cockpit functional capabilities were tailored to satisfy operational needs, providing for normal flight and combat phases of the mission. Several configuration design alternatives were evaluated by ... |
|
| High Acceleration Cockpits for Advanced Fighter Aircraft. Volume III. Test Plan. |
MAY 1974 |
|
| Authors:
Carl F. Asiala; Thomas J. Quinn; MCDONNELL DOUGLAS CORP ST LOUIS MO
|
| A high acceleration cockpit design and integration program was conducted, using a full scale design aid. Alternate configurations were compared using this full scale design aid in a formally structured evaluation including mission related task elements. Crew station characteristics were thus related to operator needs in a mission context for advanced fighter concepts. (Author) |
|
| Jet Noise Reduction for Military Reconnaissance/Surveillance Aircraft. Phase II. Analysis and Design of a Quiet Research Test Vehicle |
APR 1974 |
187 pages |
| Authors:
Robert F. Speth; M. V. Barsottelli; R. L. Ashby; W. N. Meholik; G. E. Snyder; BELL AEROSPACE CO BUFFALO NY
|
| This report presents the results of the analysis and design of a static ground test version of a Quiet Research Test Vehicle (QRTV) utilizing flightworthy propulsion system components. Also included is a discussion of the fabrication of a sufficient number of propulsive struts, employing multiple micro-jets, to propel a Schweizer SGS 2-32 sailplane up to 123 knots airspeed. The analysis and design encompasses the information required to modify the sailplane ... |
|
| Design and Development Testing of Free Planet Transmission Concept. |
APR 1974 |
|
| Authors:
Neil A. De Bruyne; CURTISS-WRIGHT CORP WOOD-RIDGE N J
|
| This report presents the results of an experimental program to demonstrate and evaluate the Curtiss-Wright free planet concept for power transmission. The program consisted of designing a 500-horsepower speed reducer to operate at 8000 rpm input speed and 19.2425 reduction ratio. This design was procured and evaluated. The evaluation consisted of static and dynamic evaluation as well as 50 hours of endurance testing at rated operating conditions. (Modified author abstract) ... |
|
| Laboratory Tests of an Air Cushion Recovery System for the Jindivik Aircraft. |
APR 1974 |
|
| Authors:
John C. Vaughan III; James T. Steiger; David J. Pool; Shade Campbell; AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH
|
| Full-scale static tests and vertical drop tests were made with an air cushion recovery system (ACRS) installed on the Australian Jindivik drone. The actual aircraft fuselage and wing were used, while the jet engine and other equipment were simulated with inert weights. These laboratory tests were exploratory and results were used to determine a final design. The air supply system components were varied to determine their effect on hover conditions, ... |
|
| Design Data for Composite Structure Safelife Prediction. Volume II. Test Data. |
MAR 1974 |
|
| Authors:
Erwin C. Durchlaub; Richard B. Freeman; BOEING VERTOL CO PHILADELPHIA PA
|
| This volume contains information on test procedures and methods used to generate empirical data for the 0/90/45 family of boron-epoxy composites which would be suitable for utilization in the design and design comparison of damage tolerant structures and all the data re-sulting from these tests. The testing of boron-epoxy laminates in-cluded tension and compression, and static and fatigue, for various laminates of the 0/plus or minus 45/90 family, notched and ... |
|
| State-of-the-Art Review of Altimeter Displays. |
MAR 1974 |
|
| Authors:
Anthony J. Antenucci; HUMAN ENGINEERING LAB ABERDEEN PROVING GROUND MD
|
| A literature review was performed to determine what work has been done to date in developing an improved altimeter. Most of the previous studies have been comparisons of different types of altimeters (e.g., counter drum pointer versus counter pointer). These tests have a drawback in that the results may have been biased by an altimeter which was a poor representative of its particular type. (Author) |
|
| Residual Strength Characterization of Laminated Composites Subjected to Impact Loading |
FEB 1974 |
|
| Authors:
George E. Husman; James M. Whitney; John C. Halpin; AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH
|
| An analogy between damage inflicted by a single point hard particle impact and damage inflicted by inserting a flaw of known dimensions in a static tensile coupon is discussed. The results suggest that residual strength can be predicted as a function of kinetic energy of impact by executing two experiments, a static tensile test on an unflawed specimen and a static tensile test on a coupon previously subjected to a ... |
|
| Bending Strength and Stiffness of Bridge Piles after 85 Years in the Milwaukee River. |
1974 |
|
| Authors:
B. A. Bendtsen; FOREST PRODUCTS LAB MADISON WIS
|
| Static bending tests were conducted on small clear specimens from untreated piles salvaged from the Milwaukee River. Strength and stiffness of red pine pile material was substantially lower than published values for the species; white pine and tamarack results showed little or no apparent effects due to the river exposure. |
|
| Fracture Analysis of Fatigue Damage Mechanisms in Fiber Reinforced Composite Materials Using Scanning Electron Microscopy. |
1974 |
|
| Authors:
R. S. Williams; K. L. Reifsnider; VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF AEROSPACE AND OCEAN ENGINEERING
|
| A variety of experimental and analytical methods have been used in attempting to characterize the fatigue damage processes in fiber reinforced composite materials. There has, however, been a distinct lack of SEM fractography applied to this area. In this report, composite SEM fractographs (approx. 70 - 80x) of two composite material systems (boron/epoxy and boron/aluminum) having the same fibers, layup and geometry, but drastically different matrix materials, are presented and ... |
|
| NAVAIRDEVCEN Graphite-Epoxy Composite Wing for BQM-34E: Static Test Results |
03 DEC 73 |
32 pages |
| Authors:
Mark Libeskind; Joseph Minecci; S. L. Huang; Edward J. McQuillen; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA
|
| A graphite epoxy composite wing for the BQM-34E unmanned supersonic aerial target vehicle has been successfully static tested to 100 percent design limit load at the NAVAIRDEVCEN. |
|
| NAVAIRDEVCEN Graphite-Epoxy Composite Wing for BQM-34E: Static Test Results. |
03 DEC 1973 |
|
| Authors:
Mark Libeskind; Joseph Minecci; S. L. Huang; Edward J. McQuillen; NAVAL AIR DEVELOPMENT CENTER WARMINSTER PA AIR VEHICLE TECHNOLOGY DEPT
|
| A graphite-epoxy composite wing for the BQM- 34E unmanned supersonic aerial target vehicle has been successfully static tested to 100 percent design limit load at the NAVAIRDEVCEN (Naval Air Development Center). Test procedures and results are described, and comparisons between analytical predictions and recorded values are presented. Good correlation between analysis and test was observed. On the basis of this test, the composite wing is considered statically quali-fied for flight. ... |
|
| Plane Strain Fracture Toughness (KIC) Data Handbook for Metals. |
DEC 1973 |
92 pages |
| Authors:
William T. Matthews; ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS
|
| N MASSPlane Strain Fracture Toughness (KIC) Data Handbook for Metals.Final rept.,FMatthews,William T. ;AMMRC-MS-73-6DA-1-T-062105-A-349*Fracture(Mechanics), *Handbooks, *Metals, Alloys, Toughness, Tables(Data), Steel, Maraging steels, Nickel steels, Stainless steel, Titanium alloys, Aluminum alloys, Copper alloys, Zinc alloys, Magnesium alloys, Beryllium, Manganese alloys, Bibliographies, Static tests, Heat treatment, Yield strength*Fracture strength, Griffith crackA compilation of plane strain KIC data is presented for metals manufactured in the USA and Europe, including 50 steels, 21 titanium alloys, ... |
|
| Dynamic Strength Study of Small Fixed-Edge, Longitudinally Restrained Two-Way Reinforced Concrete Slabs. |
DEC 1973 |
|
| Authors:
Wayne M. Brown; Michael S. Black; ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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| The study is one phase of an effort to develop criteria that will be helpful in evaluating or predicting the airblast load-carrying capacity of conventional floor slabs in existing Defense Civil Preparedness Agency approved shelters. The general objective of this study was to investigate the static and dynamic behavior of small, fixed-edge, longitudinally restrained, two-way reinforced concrete slabs. Twelve tests, four static and eight dynamic, were conducted on slabs with ... |
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STATIC TESTS
