NASA/TM—2012-217411 Materials Selection for Aerospace Systems Steven M. Arnold Glenn Research Center, Cleveland, Ohio David Cebon and Mike Ashby University of Cambridge, Cambridge, United Kingdom An errata was added to this document, October 2012 January 2012 NASA STI Program . . . in Profi le Since its founding, NASA has been dedicated to the • CONFERENCE PUBLICATION. Collected advancement of aeronautics and space science. The papers from scientifi c and technical NASA Scientifi c and Technical Information (STI) conferences, symposia, seminars, or other program plays a key part in helping NASA maintain meetings sponsored or cosponsored by NASA. this important role. • SPECIAL PUBLICATION. Scientifi c, The NASA STI Program operates under the auspices technical, or historical information from of the Agency Chief Information Offi cer. 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Available from NASA Center for Aerospace Information National Technical Information Service 7115 Standard Drive 5301 Shawnee Road Hanover, MD 21076–1320 Alexandria, VA 22312 Available electronically at http://www.sti.nasa.gov Errata (cid:3)(cid:3)Issued (cid:50)(cid:70)(cid:87)(cid:82)ber 2012 for NASA/TM—2012-217411 Materials Selection for Aerospace Systems Steven M. Arnold, David Cebon, and Mike Ashby January 2012 Figure 13(a) and (b): Figure and caption has been changed to read as follows: NASA/TM—2012-217411 iii Figure 13.—Illustration of thhe interaction bbetween three material indicees for a blade ssubjected to tension, beending and vibration. (a) Indeependent; and ((b) Interacting constraints. NASA/TMM—2012-2174111 iv Figure 13.—Concludeed. NASA/TMM—2012-2174111 v Section 3..3.6, text has been changedd to read as foollows: Example: Aluminum Metal Matriix Compositee (MMC) Foams and Latttices The sttarting point iis aluminum 220% SiC(p),44 a mix that iss the basis of oone of the Cyymat range off metal foamms. The properties of two hybrids are compared a “FFoam” and ann “Octet latticce”, that generrates two sets oof new records. They appeaar on the Moddulus-Densityy chart of Figuure 33 as linees of white annd gray circles, respectiveely. The starting material, AAl 20% SiC(pp), is identifieed at the uppeer right. The modeled ffoams, plottedd white, are laabeled with ttheir relative ddensities in pparentheses. MMeasured dataa for real alumiinum-SiC(p) foams (shownn as black ellipse in Fig. 33) are also labbeled, underlined, with rellative densities iin parentheses, allowing a comparison. Note that thee lattices, plottted in gray, liie at higher vaalues of moduluus for the samme density. Att a relative density of 3.5%% (0.035) the llattice is preddicted to be teen times stifffer than foamm of that density. Figure 33, figure aand caption haas been changged to read as follows: Figurre 33.—The inpput window of tthe synthesizerr, set for Cellulaar structures –Octet lattice. TThe chart showws somme of the outpuut. The startingg material, Al 200% SiC(p) apppears at the uppper right. The line of white ellipses show the modulus and density of foamms made from AAl-SiC(p). Theyy should be compared with thhe meeasured valuess for real aluminnum SiC(p) foaams, shown in bblack with undeerlined labels. The relative dennsities are listeed in brackets. The modulus aand density of llattices made oof the same maaterial are shoown in gray forr comparison. CChart generated by the CES HHybrid Synthessizer, (Ashby eet al., 2010). NASA/TMM—2012-2174111 vi Figgure 34.—The moduli of Al-SiC lattices compared to those of the other mmaterials of enggineering. The lattices lie outside the currenttly populated arreas of the chaart. Numbers inn brackets are rrelative ddensities. Charrt generated byy the CES Hybrrid Synthesizerr, (Ashby et al.,, 2010). NASA/TMM—2012-2174111 vii