NASA Technical Reports Server (NTRS) 20120001798: Materials Selection for Aerospace Systems

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by  NASA Technical Reports Server (NTRS)

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
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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
National Aeronautics and
Space Administration
Glenn Research Center
Cleveland, Ohio 44135
January 2012
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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).

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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