NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsCost-Benefit Analysis for the Advanced Near Net Shape Technology (ANNST) Method for Fabricating Stiffened CylindersThis cost-benefit analysis assesses the benefits of the Advanced Near Net Shape Technology (ANNST) manufacturing process for fabricating integrally stiffened cylinders. These preliminary, rough order-of-magnitude results report a 46 to 58 percent reduction in production costs and a 7-percent reduction in weight over the conventional metallic manufacturing technique used in this study for comparison. Production cost savings of 35 to 58 percent were reported over the composite manufacturing technique used in this study for comparison; however, the ANNST concept was heavier. In this study, the predicted return on investment of equipment required for the ANNST method was ten cryogenic tank barrels when compared with conventional metallic manufacturing. The ANNST method was compared with the conventional multi-piece metallic construction and composite processes for fabricating integrally stiffened cylinders. A case study compared these three alternatives for manufacturing a cylinder of specified geometry, with particular focus placed on production costs and process complexity, with cost analyses performed by the analogy and parametric methods. Furthermore, a scalability study was conducted for three tank diameters to assess the highest potential payoff of the ANNST process for manufacture of large-diameter cryogenic tanks. The analytical hierarchy process (AHP) was subsequently used with a group of selected subject matter experts to assess the value of the various benefits achieved by the ANNST method for potential stakeholders. The AHP study results revealed that decreased final cylinder mass and quality assurance were the most valued benefits of cylinder manufacturing methods, therefore emphasizing the relevance of the benefits achieved with the ANNST process for future projects.Document ID20160006525Acquisition SourceLangley Research CenterDocument TypeTechnical Memorandum (TM)AuthorsStoner, Mary Cecilia*(Princeton Univ. Princeton, NJ, United States)*Hehir, Austin R.*(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)*Ivanco, Marie L.*(NASA Langley Research Center Hampton, VA, United States)*Domack, Marcia S.*(NASA Langley Research Center Hampton, VA, United States)*Date AcquiredMay 24, 2016Publication DateMay 1, 2016Subject CategoryEconomics And Cost AnalysisSpacecraft Design, Testing And PerformanceReport/Patent NumberL-20600NF1676L-24068NASA/TM-2016-219192Funding Number(s)WBS: WBS 736466.01.08.07.06.01Distribution LimitsPublicCopyrightPublic Use Permitted.Available DownloadsNameType20160006525.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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