Download or read book Advanced Technology Composite Aircraft Structures written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work performed during the 25th month on NAS1-18889, Advanced Technology Composite Aircraft Structures, is summarized. The main objective of this program is to develop an integrated technology and demonstrate a confidence level that permits the cost- and weight-effective use of advanced composite materials in primary structures of future aircraft with the emphasis on pressurized fuselages. The period from 1-31 May 1991 is covered. Ilcewicz, Larry B. and Walker, Thomas H. Unspecified Center AIRCRAFT CONSTRUCTION MATERIALS; AIRCRAFT STRUCTURES; COMPOSITE MATERIALS; COMPOSITE STRUCTURES; CONFIDENCE LIMITS; FUSELAGES...
Download or read book Composite Materials for Aircraft Structures written by Alan A. Baker and published by AIAA. This book was released on 2004 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Technology Composite Fuselage written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Advanced Technology Composite Aircraft Structures (ATCAS) program has studied transport fuselage structure with a large potential reduction in the total direct operating costs for wide-body commercial transports. The baseline fuselage section was divided into four 'quadrants', crown, keel, and sides, gaining the manufacturing cost advantage possible with larger panels. Key processes found to have savings potential include (1) skins laminated by automatic fiber placement, (2) braided frames using resin transfer molding, and (3) panel bond technology that minimized mechanical fastening. The cost and weight of the baseline fuselage barrel was updated to complete Phase B of the program. An assessment of the former, which included labor, material, and tooling costs, was performed with the help of design cost models. Crown, keel, and side quadrant cost distributions illustrate the importance of panel design configuration, area, and other structural details. Composite sandwich panel designs were found to have the greatest cost savings potential for most quadrants. Key technical findings are summarized as an introduction to the other contractor reports documenting Phase A and B work completed in functional areas. The current program status in resolving critical technical issues is also highlighted. Ilcewicz, L. B. and Smith, P. J. and Hanson, C. T. and Walker, T. H. and Metschan, S. L. and Mabson, G. E. and Wilden, K. S. and Flynn, B. W. and Scholz, D. B. and Polland, D. R. and Fredrikson, H. G. and Olson, J. T. and Backman, B. F. Langley Research Center COMPOSITE STRUCTURES; FUSELAGES; TRANSPORT AIRCRAFT; COST REDUCTION; SANDWICH STRUCTURES; OPERATING COSTS; COMPOSITE MATERIALS; RESIN TRANSFER MOLDING; WEIGHT REDUCTION; MANUFACTURING; STRUCTURAL DESIGN; TOOLING; DESIGN TO COST; MAINTENANCE; SKIN (STRUCTURAL MEMBER)...
Download or read book Advanced Technology Composite Fuselage Materials and Processes written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of Boeing's Advanced Technology Composite Aircraft Structures (ATCAS) program was to develop the technology required for cost and weight efficient use of composite materials in transport fuselage structure. This contractor report describes results of material and process selection, development, and characterization activities. Carbon fiber reinforced epoxy was chosen for fuselage skins and stiffening elements and for passenger and cargo floor structures. The automated fiber placement (AFP) process was selected for fabrication of monolithic and sandwich skin panels. Circumferential frames and window frames were braided and resin transfer molded (RTM'd). Pultrusion was selected for fabrication of floor beams and constant section stiffening elements. Drape forming was chosen for stringers and other stiffening elements. Significant development efforts were expended on the AFP, braiding, and RTM processes. Sandwich core materials and core edge close-out design concepts were evaluated. Autoclave cure processes were developed for stiffened skin and sandwich structures. The stiffness, strength, notch sensitivity, and bearing/bypass properties of fiber-placed skin materials and braided/RTM'd circumferential frame materials were characterized. The strength and durability of cocured and cobonded joints were evaluated. Impact damage resistance of stiffened skin and sandwich structures typical of fuselage panels was investigated. Fluid penetration and migration mechanisms for sandwich panels were studied. Scholz, D. B. and Dost, E. F. and Flynn, B. W. and Ilcewicz, L. B. and Nelson, K. M. and Sawicki, A. J. and Walker, T. H. and Lakes, R. S. Langley Research Center NASA-CR-4731, NAS 1.26:4731 NAS1-18889; NAS1-20013; RTOP 510-02-13-01...
Download or read book Advanced Technology Composite Fuselage Structural Performance written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boeing is studying the technologies associated with the application of composite materials to commercial transport fuselage structure under the NASA-sponsored contracts for Advanced Technology Composite Aircraft Structures (ATCAS) and Materials Development Omnibus Contract (MDOC). This report addresses the program activities related to structural performance of the selected concepts, including both the design development and subsequent detailed evaluation. Design criteria were developed to ensure compliance with regulatory requirements and typical company objectives. Accurate analysis methods were selected and/or developed where practical, and conservative approaches were used where significant approximations were necessary. Design sizing activities supported subsequent development by providing representative design configurations for structural evaluation and by identifying the critical performance issues. Significant program efforts were directed towards assessing structural performance predictive capability. The structural database collected to perform this assessment was intimately linked to the manufacturing scale-up activities to ensure inclusion of manufacturing-induced performance traits. Mechanical tests were conducted to support the development and critical evaluation of analysis methods addressing internal loads, stability, ultimate strength, attachment and splice strength, and damage tolerance. Unresolved aspects of these performance issues were identified as part of the assessments, providing direction for future development. Walker, T. H. and Minguet, P. J. and Flynn, B. W. and Carbery, D. J. and Swanson, G. D. and Ilcewicz, L. B. Langley Research Center COMPOSITE STRUCTURES; FUSELAGES; TRANSPORT AIRCRAFT; STRUCTURAL DESIGN; PERFORMANCE PREDICTION; COMPOSITE MATERIALS; MANUFACTURING; DATA BASES; STRUCTURAL FAILURE; DAMAGE ASSESSMENT; LOADS (FORCES); AEROELASTICITY; TOLERANCES (MECHANICS); DESIGN ANALYSIS; PREDICTION ANALYSIS TECHNIQUES; STABILITY...
Download or read book Advanced Composite Materials written by Curt Rogers and published by . This book was released on 1992 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This RAND Note documents a study on the important institutional activities and processes that contributed to the timely maturation of advanced composite materials technology for use in combat aircraft structures. The primary purpose of this Note is to identify the roles that the Air Force (and other governmental organizations) played in the transition of composites from an emerging and potentially important military technology to the point of initial applications in new aircraft designs. This study was motivated by the hypothesis that the successful development of divergent technologies (for military purposes) may have some important and common institutional factors that can be identified. For example, the phasing of critical-technologies identification studies, the enduring presence of technology advocates within the Department of Defense, and the funding of advanced technology development programs may all be as important to a maturation process as are those elements that are strictly technical in nature. This work was performed in the Resource Management and System Acquisition Program within Project AIR FORCE. This Note supplements RAND report R-4199-AF, Maintaining Future Military Aircraft Design Capability (1992), which examines the general question of how to maintain combat aircraft design capabilities in rapidly changing threat and budget environments.
Download or read book Advanced Technology Composite Fuselage Manufacturing written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of Boeing's Advanced Technology Composite Aircraft Structures (ATCAS) program is to develop the technology required for cost-and weight-efficient use of composite materials in transport fuselage structure. Carbon fiber reinforced epoxy was chosen for fuselage skins and stiffening elements, and for passenger and cargo floor structures. The automated fiber placement (AFP) process was selected for fabrication of stringer-stiffened and sandwich skin panels. Circumferential and window frames were braided and resin transfer molded (RTM'd). Pultrusion was selected for fabrication of floor beams and constant-section stiffening elements. Drape forming was chosen for stringers and other stiffening elements cocured to skin structures. Significant process development efforts included AFP, braiding, RTM, autoclave cure, and core blanket fabrication for both sandwich and stiffened-skin structure. Outer-mold-line and inner-mold-line tooling was developed for sandwich structures and stiffened-skin structure. The effect of design details, process control and tool design on repeatable, dimensionally stable, structure for low cost barrel assembly was assessed. Subcomponent panels representative of crown, keel, and side quadrant panels were fabricated to assess scale-up effects and manufacturing anomalies for full-scale structures. Manufacturing database including time studies, part quality, and manufacturing plans were generated to support the development of designs and analytical models to access cost, structural performance, and dimensional tolerance. Wilden, K. S. and Harris, C. G. and Flynn, B. W. and Gessel, M. G. and Scholz, D. B. and Stawski, S. and Winston, V. Langley Research Center COMPOSITE STRUCTURES; MANUFACTURING; FUSELAGES; TRANSPORT AIRCRAFT; SANDWICH STRUCTURES; RESIN TRANSFER MOLDING; DATA BASES; FABRICATION; EPOXY MATRIX COMPOSITES; CARBON FIBERS; STIFFENING; STRINGERS; TOOLING; PULTRUSION; PANELS; DIMENSIONAL STABILITY; SKIN (STRUCTURAL MEMBER); BRAIDED CO...
Download or read book Structures Technology written by Ahmed Khairy Noor and published by AIAA. This book was released on 1998 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawn from early volumes of Aerospace America and its antecedents, this book rescues the insights, concerns, and dreams of dozens of structural engineers for the next generation of aerospace scientists and engineers. Written by eminent individuals in structures, this book provides accessible source material for university-level design courses in aerospace engineering. The first paper in Structures Technology deals with new structures for future aerospace systems and provides a contrast between our current thinking and past technology plans. Succeeding papers are historical reports covering materials and structures, general structures technology, aircraft structures, space structures, and structural dynamics technology. You will also find sections covering structural configurations, thermal protection systems, subsonic aircraft, supersonic and hypersonic vehicles and structures for space systems.
Download or read book Commercial Aircraft Composite Technology written by Ulf Paul Breuer and published by Springer. This book was released on 2016-05-10 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on lectures held at the faculty of mechanical engineering at the Technical University of Kaiserslautern. The focus is on the central theme of societies overall aircraft requirements to specific material requirements and highlights the most important advantages and challenges of carbon fiber reinforced plastics (CFRP) compared to conventional materials. As it is fundamental to decide on the right material at the right place early on the main activities and milestones of the development and certification process and the systematic of defining clear requirements are discussed. The process of material qualification - verifying material requirements is explained in detail. All state-of-the-art composite manufacturing technologies are described, including changes and complemented by examples, and their improvement potential for future applications is discussed. Tangible case studies of high lift and wing structures emphasize the specific advantages and challenges of composite technology. Finally, latest R&D results are discussed, providing possible future solutions for key challenges such as low cost high performance materials, electrical function integration and morphing structures.
Download or read book NASA Advanced Composites Technology Conference 1st Held in Seattle Washington on 29 October 1 November 1990 written by and published by . This book was released on 1991 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial contents: Advanced Composite Structural Concepts and Material Technologies for Primary Aircraft Structures; Composites Technology for Transport Primary Structure; Advanced Technology Commercial Fuselage Structure; Design, Analysis and Fabrication of the Technology Integration Box Beam; Design and Manufacturing Concepts for Thermoplastic Structures; Structural Evaluation of Curved Stiffened Composite Panels Fabricated Using a Therm-XSm Process; Noise Transmission Properties and Control Strategies for Composite Structures; Long Discontinuous Fiber Composite Structure-Forming and Structural Mechanics; Resin Transfer Molding for Advanced Composite Primary Consolidation of Graphite/Thermoplastic Textile Preforms for Primary Aircraft Structure; Cost Studies for Commercial Fuselage Crown Designs; A Unified Approach for Composite Cost Reporting and Prediction in the ACT Program.
Download or read book Advanced Technology Composite Fuselage Repair and Damage Assessment Supporting Maintenance written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under the NASA-sponsored contracts for Advanced Technology Composite Aircraft Structures (ATCAS) and Materials Development Omnibus Contract (MDOC), Boeing is studying the technologies associated with the application of composite materials to commercial transport fuselage structure. Included in the study is the incorporation of maintainability and repairability requirements of composite primary structure into the design. This contractor report describes activities performed to address maintenance issues in composite fuselage applications. A key aspect of the study was the development of a maintenance philosophy which included consideration of maintenance issues early in the design cycle, multiple repair options, and airline participation in design trades. Fuselage design evaluations considered trade-offs between structural weight, damage resistance/tolerance (repair frequency), and inspection burdens. Analysis methods were developed to assess structural residual strength in the presence of damage, and to evaluate repair design concepts. Repair designs were created with a focus on mechanically fastened concepts for skin/stringer structure and bonded concepts for sandwich structure. Both a large crown (skintstringer) and keel (sandwich) panel were repaired. A compression test of the keel panel indicated the demonstrated repairs recovered ultimate load capability. In conjunction with the design and manufacturing developments, inspection methods were investigated for their potential to evaluate damaged structure and verify the integrity of completed repairs. Flynn, B. W. and Bodine, J. B. and Dopker, B. and Finn, S. R. and Griess, K. H. and Hanson, C. T. and Harris, C. G. and Nelson, K. M. and Walker, T. H. and Kennedy, T. C. and Nahan, M. F. Langley Research Center FUSELAGES; MAINTENANCE; COMPOSITE STRUCTURES; BOLTED JOINTS; BONDED JOINTS; TRANSPORT AIRCRAFT; CIVIL AVIATION; MAINTAINABILITY; STRINGERS; STRUCTURAL WEIGHT; INSPECTION; TRADEOFFS; SKIN (STRUCTURAL MEMBER); ...
Download or read book Materials Structures and Manufacturing for Aircraft written by Melih Cemal Kuşhan and published by Springer Nature. This book was released on 2022-04-25 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive look at materials science topics in aerospace, air vehicle structures and manufacturing methods for aerospace products, examining recent trends and new technological developments. Coverage includes additive manufacturing, advanced material removal operations, novel wing systems, design of landing gear, eco-friendly aero-engines, and light alloys, advanced polymers, composite materials and smart materials for structural components. Case studies and coverage of practical applications demonstrate how these technologies are being successfully deployed. Materials, Structures & Manufacturing for Aircraft will appeal to a broad readership in the aviation community, including students, engineers, scientists, and researchers, as a reference source for material science and modern production techniques.
Download or read book NASA Advanced Composites Technology Conference 1st Held in Seattle Washington on 29 October 1 November 1990 written by and published by . This book was released on 1991 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial contents: Advanced Composite Structural Concepts and Material Technologies for Primary Aircraft Structures; Composites Technology for Transport Primary Structure; Advanced Technology Commercial Fuselage Structure; Design, Analysis and Fabrication of the Technology Integration Box Beam; Design and Manufacturing Concepts for Thermoplastic Structures; Structural Evaluation of Curved Stiffened Composite Panels Fabricated Using a Therm-XSm Process; Noise Transmission Properties and Control Strategies for Composite Structures; Long Discontinuous Fiber Composite Structure-Forming and Structural Mechanics; Resin Transfer Molding for Advanced Composite Primary Aircraft Structures; Consolidation of Graphite/Thermoplastic Textile Preforms for Primary Aircraft Structure; Cost Studies for Commercial Fuselage Crown Designs; A Unified Approach for Composite Cost Reporting and Prediction in the ACT Program.
Download or read book New Materials for Next Generation Commercial Transports written by Committee on New Materials for Advanced Civil Aircraft and published by National Academies Press. This book was released on 1996-03-29 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of this book was to identify issues related to the introduction of new materials and the effects that advanced materials will have on the durability and technical risk of future civil aircraft throughout their service life. The committee investigated the new materials and structural concepts that are likely to be incorporated into next generation commercial aircraft and the factors influencing application decisions. Based on these predictions, the committee attempted to identify the design, characterization, monitoring, and maintenance issues that are critical for the introduction of advanced materials and structural concepts into future aircraft.
Download or read book Advanced Composites Structural Concepts and Materials Technologies for Primary Aircraft Structures Design manufacturing Concept Assessment written by and published by . This book was released on 1992 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Composites Structural Concepts and Materials Technologies for Primary Aircraft Structures Structural Response and Failure Analysis written by and published by . This book was released on 1992 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Manufacture of Advanced Composite Aircraft Structures Using Automated Tow Placement written by Ian Brett Land and published by . This book was released on 1996 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt:
