WorldCat Identities

Wright Laboratory (Wright-Patterson Air Force Base, Ohio) Materials Directorate

Overview
Works: 23 works in 27 publications in 1 language and 58 library holdings
Genres: Handbooks and manuals  Conference papers and proceedings  History 
Classifications: TA409, 620.1126
Publication Timeline
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Most widely held works by Wright Laboratory (Wright-Patterson Air Force Base, Ohio)
Composite failure analysis handbook by Ramesh J Kar( Book )

2 editions published in 1993 in English and held by 18 WorldCat member libraries worldwide

The objective of this program was to create a comprehensive handbook for use in conducting failure analysis investigations on failed composite structure. This program builds upon previous efforts as documented in the "Compendium of Post-Failure Analysis Techniques for Composite Materials," AFWAL-TR-86-4137. The purpose of creating this handbook was to document the techniques, the fractographic and material property data and case history studies currently being utilized in the analysis of failed composite structure. The major tasks on this program included: (1) procedural guidelines for field investigation techniques; (2) an expanded fractographic data base for carbon/epoxy materials tested under known conditions; (3) a fractographic data base for resin based composite materials other than carbon/epoxy; (4) fractographic documentation of composite material and processing defects; (5) documentation of fracture characteristics in adhesive and mechanical joint failures; (6) compilation of material property data for composite materials; and (7) documentation of case histories recently conducted on failed composite structure
Composite failure analysis handbook : Update #1 by Greg Walker( Book )

1 edition published in 1996 in English and held by 5 WorldCat member libraries worldwide

Damage tolerant design handbook : a compilation of fracture and crack growth data for high-strength alloys( Book )

2 editions published in 1994 in English and held by 4 WorldCat member libraries worldwide

Composite failure analysis handbook( Book )

in English and held by 4 WorldCat member libraries worldwide

Proceedings, Air Force 4th Aging Aircraft Conference : 9-11 July 1996, United States Air Force Academy, Colorado by Air Force Aging Aircraft Conference( Book )

1 edition published in 1997 in English and held by 3 WorldCat member libraries worldwide

Traction data analysis : Part 1, Perfluoropolyalkylether fluids by Pradeep K Gupta( Book )

1 edition published in 1995 in English and held by 2 WorldCat member libraries worldwide

Composite failure analysis handbook by Greg Walker( Book )

1 edition published in 1997 in English and held by 2 WorldCat member libraries worldwide

Mechanical behavior of advanced aerospace materials by Noel E Ashbaugh( Book )

2 editions published between 1995 and 1996 in English and held by 2 WorldCat member libraries worldwide

This report summarizes investigations involving the characterization of second tier mechanical properties of current and advanced aerospace materials and the development of damage tolerant design approaches and durability analyses for the applications of these materials. Specifically, studies of gamma-titanium aluminides have dealt with the identification and origins of defects that are associated with processing procedures and with the role of defects and grain orientation on fatigue crack initiation. Growth of both through-the-thickness and surface bridged cracks in unidirectional metal matrix composites was studied over ranges of stress ratios and temperatures. The shear lag model that was developed to predict through-the-thickness crack growth was modified to successfully predict the effect of stress ratio and temperature on the surface crack growth. Damage evolution, associated with fiber breakage, and deformation models were developed for sustained loading of unidirectional metal matrix composites and extended to fatigue conditions. Studies of ceramic composite systems were conducted to understand the mechanics and mechanisms of damage initiation and crack growth in smooth sided and notched specimens under monotonic and fatigue loads. The influences of high cycle fatigue, fretting fatigue. and fatigue-load interactions on damage tolerance and mixed-mode crack growth of current monolithic structural alloys have been investigated for an enhanced understanding of improved life prediction methodologies. In support of the preceding investigations. the following experimental tools and methodologies were investigated and/or developed - a) surface wave amplitudes for correlation with the formation and the opening and closing of ceramic matrix cracks during load/unload cycles. b) broadband sensors for detection of surface waves and rod waves to locate fiber breaks in metal matrix composites
Mechanical behavior of high temperature structural materials by Noel E Ashbaugh( Book )

1 edition published in 1994 in English and held by 2 WorldCat member libraries worldwide

Composite failure analysis handbook. update 1 by Greg Walker( Book )

1 edition published in 1995 in English and held by 2 WorldCat member libraries worldwide

This report supplements the data and analyses provided in the previously released 'Composite Failure Analysis Handbook, ' WL-TR-91-4032/DOT/FAA/CT-91/23. It contains fractograhic data from failed composite test specimens as well as ease histories of failed composite structure. Fractographic data from statically loaded test specimens are presented for carbon/epoxy (AS4/3501-6), carbon/ pseudothermoplastic (AS4/KIII), carbon/polyimide (AS4/PMR-15), carbon/thermoplastic (AS4/PEEK), carbon/bismaleimide (AS4/MR-54-4), and carbon and glass low-temperature curing epoxy, (HTA 5131-12K/Rutapox L-20/SL and EC 9-756/K43/Rutapox L-20/SL) materials. Fractographic data are presented for translaminar and interlaminar carbon/resin laminate fatigue specimens, as well as for several failure modes in composite skin nomex honeycomb core specimens. Three failure investigations, including two composite honeycomb structures and one carbon/epoxy laminate structure, are also documented
Proceedings, Air Force 3rd Aging Aircraft Conference : 26-28 September 1995, Hope Hotel & Conference Center, Wright-Patterson Air Force Base, Ohio by Air Force Aging Aircraft Conference( Book )

1 edition published in 1996 in English and held by 2 WorldCat member libraries worldwide

Proceedings of the 1991 USAF Structural Integrity Program Conference by United States( Book )

2 editions published in 1992 in English and held by 2 WorldCat member libraries worldwide

This report is a compilation of the papers presented at the 1991 USAF Structural Integrity Program Conference held at the Hyatt Regency, San Antonio, Texas on 2-6 Decemer 1991. The purpose of this 1991 Conference was to bring together technical personnel in DOD and the aerospace industry who are involved in the various technologies required to ensure the structural integrity of aircraft gas turbine engines, airframes and other mechanical systems. It provided a forum to exchange ideas and share new information relating to the critical aspects of durability and damage tolerance technology for aircraft systems. The Conference was sponsored by the Aeronautical Systems Division Deputy for Engineering and Materials and Flight Dynamics Directorates of the Wright Laboratory, Wright-Patterson Air Force Base, Ohio. It was hosted by the Air Force Logistics Command's San Antonio Air Logistics Center
Carbon-Carbon Composites (CCC) - A Historical Perspective by Donald L Schmidt( Book )

1 edition published in 1996 in English and held by 1 WorldCat member library worldwide

Carbon carbon composite (CCC) materials are typically composed of a fibrous carbon reinforcement, a carbonaceous or graphitic matrix, and sometimes other fillers or coatings to impart specialized properties. CCC materials have an outstanding balance of properties which have led to many important uses in the aerospace, defense, braking, industrial and other fields. This report provides a historical perspective of CCC materials, including (a) the most important developmental events, (b) the present technology base, and (c) present and future uses. The international materials community has assisted in compiling over 1400 historical events. Many of these events are listed in the report. Hopefully, they will assist in (a) recognizing major CCC events of the past, (b) stimulate new approaches and solutions for current problems and issues, and (c) provide a basis for forecasting future developments
Proceedings of the 1994 USAF Structural Integrity Program Conference Hyatt Regency San Antonio, Texas ; final report for period 6 - 8 December 1994 by Structural Integrity Program Conference( Book )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

This report contains the proceedings of the 1994 USAF Structural Integrity Program Conference held at the Hyatt Regency Hotel in San Antonio, Texas from 6-8 December 1994. The conference, which was sponsored by the Aeronautical Systems Center's Engineering Directorate and the Wright Laboratory's Flight Dynamics and Materials Directorates, was hosted by the San Antonio Air Logistics Center Aircraft Directorate, Aircraft Structural Integrity Branch (SA-ALC/LADD). This conference, as in previous years, was held to permit experts in the field of structural integrity to communicate with each other and to exchange views on how to improve the structural integrity of military weapon systems. Sessions were primarily focused on analysis and testing, engine structural integrity, structural materials and inspections, structural repair, and force management. This year, as in previous years, our friends from outside the U.S. borders provided the audience with outstanding presentations on activities within their countries. It is anticipated that this conference will include their contributions in the agenda of future meetings. This year eighteen countries were represented in the audience
Ceramic bearing development( Book )

1 edition published in 1995 in English and held by 1 WorldCat member library worldwide

History of the Air Force Materials Laboratory by Lloyd Bryant( Book )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

Characterization of the isothermal elevated temperature high frequency fatigue behavior of SCS-6/Timetal 21S [0/90]s by Norman D Schehl( Book )

1 edition published in 1996 in English and held by 1 WorldCat member library worldwide

Spectrum fatigue behavior of powder metallurgy aluminium alloys by G. V Scarich( Book )

1 edition published in 1991 in English and held by 1 WorldCat member library worldwide

Environmentally Benign Sol-Gel Surface Treatment for Aluminum Bonding Applications( Book )

1 edition published in 1996 in English and held by 1 WorldCat member library worldwide

A surface treatment process for aluminum using sol-gel chemistry has been developed that produces strong adhesive bonds without the rinse water requirements of traditional anodizing or etching processes. In this process, an acid catalyzed sol composed of zirconium alkoxide and a silane coupling agent in water was applied to etched or grit blasted aluminum substrates by immersion or spraying. After drying at 212 deg F for 1 hour, panels were primed with Cytec BR127 or XBR6757 (nonchromated, waterborne) primer and bonded in an autoclave using Hysol 9628 adhesive. The ASTM D 3762 Wedge Test was used to screen performance. The waterbased sol-gel formulation has superior performance to more traditional alcohol-based formulations used early in this program. The best formulation, using glycidoxytrimethoxysilane as the coupling agent, showed less than 0.25 inch crack extension after exposure to 140 deg F and 100% relative humidity for 336 hours. Failure in the crack growth region appears to be cohesive. In general, the waterborne XBR6757 showed better performance than the solvent based BR127. Further characterization of the coating is needed to understand interaction effects between adherend alloy, surface preparation, sol preparation, and application technique
High polymeric materials by Carl Shipp Marvel( Book )

1 edition published in 1959 in English and held by 1 WorldCat member library worldwide

Polymerization of the phosphonitrilic isothiocyanates occurs readily. The phosphonitrilic bromides react with both Grignard reagents and organolithium compounds, but the intermediates thus formed have not yet been decomposed to yield reasonable quantities of organophosphonitrilic derivatives. The syntheses of trimeric and tetrameric phosphonitrilic fluorides by metathetical reactions of the chlorides with sodium fluoride in nitrobenzene were effected. A new reaction between the completely fluorinated compounds and aryllithium compounds gives stepwise substitution of the fluorine atoms by aryl groups. Three main problems involving coordination polymers were investigated: (1) Attempts to link betadiketone complexes together failed because substituent groups on the chelate rings are unreactive. (2) Triethylenediamine was shown to coordinate through both of its nitrogen atoms, thus to form polynuclear complexes. (3) The compositions, solubilities, and heat stabilities of a number of complexes of bis-beta-diketones with bivalent, 4-covalent metals were studied. (Author)
 
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English (24)