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  • 1
    facet.materialart.
    Unknown
    Cost studies for commercial fuselage crown designs (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Studies were conducted to evaluate the cost and weight potential of advanced composite design concepts in the crown region of a commercial transport. Two designs from each of three design families were developed using an integrated design-build team. A range of design concepts and manufacturing processes were included to allow isolation and comparison of cost centers. Detailed manufacturing/assembly plans were developed as the basis for cost estimates. Each of the six designs was found to have advantages over the 1995 aluminum benchmark in cost and weight trade studies. Large quadrant panels and cobonded frames were found to save significant assembly labor costs. Comparisons of high- and intermediate-performance fiber systems were made for skin and stringer applications. Advanced tow placement was found to be an efficient process for skin lay up. Further analysis revealed attractive processes for stringers and frames. Optimized designs were informally developed for each design family, combining the most attractive concepts and processes within that family. A single optimized design was selected as the most promising, and the potential for further optimization was estimated. Technical issues and barriers were identified.
    Keywords: COMPOSITE MATERIALS
    Type: NASA. Langley Research Center, The First NASA Advanced Composites Technology Conference, Part 1; p 339-355
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Application of a design-build-team approach to low cost and weight composite fuselage structure (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Relationships between manufacturing costs and design details must be understood to promote the application of advanced composite technologies to transport fuselage structures. A team approach, integrating the disciplines responsible for aircraft structural design and manufacturing, was developed to perform cost and weight trade studies for a twenty-foot diameter aft fuselage section. Baseline composite design and manufacturing concepts were selected for large quadrant panels in crown, side, and keel areas of the fuselage section. The associated technical issues were also identified. Detailed evaluation of crown panels indicated the potential for large weight savings and costs competitive with aluminum technology in the 1995 timeframe. Different processes and material forms were selected for the various elements that comprise the fuselage structure. Additional cost and weight savings potential was estimated for future advancements.
    Keywords: COMPOSITE MATERIALS
    Type: NASA-CR-4418 , NAS 1.26:4418
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
    Electronic Resource
    Electronic Resource
    Genetical differentiation involving morphological characters in an inbred strain of mice. I. A british branch of the C57BL strain (1957)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 100 (1957), S. 345-375 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051000206
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    Paper (German National Licenses)
    Fulltext
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