Environmental Engineering Reference
In-Depth Information
FIGURE 3.7
PN2.aerospace-grade.Aramid.iber.honeycomb..(From.Plascore.Inc.,.honeycomb.core,.online.at.
www.plascore.com/product..With.permission.)
Note :. Special. dimensions,. sizes,. tolerances,. and. speciications. can. be. pro-
vided.upon.request.
PN2.aerospace-grade.aramid.iber.honeycomb.is.shown.in.Figure 3.7.
New.prepreg.materials.have.been.developed.by.researchers.from.NASA,.
along. with. Lockheed. Martin. Engineering. 24 . Adhesives. studied. were.
AF-555M,.XMTA.241/PM15,.FM309-1M,.and.FM-300K. 25-27 .The.prepreg.mate-
rials.were.IM7/MTM45-1.and.T40-800B/5320.(Table 3.13).
Adhesives. are. necessary. between. structural. carbon. ibers. and. honey-
combs.in.prepreg.face.sheets..3M.adhesives.are.available.as.liquids,.pastes,.
tapes,.ilms,.and.shaped.solids..Each.has.characteristics.to.be.considered.for.
application.effectiveness.and.eficiency.
Pressure-sensitive.adhesives.(PSAs).can.produce.lighter.structures.that.
are. less. susceptible. to. fatigue. than. those. assembled. using. mechanical.
attachments..However,.the.parameters.that.must.be.considered.to.attain.
optimum. performance. are. very. different.. To. predict. how. bonds. will.
TABLE 3.13
New.Adhesives
AdhesiveWeight,
kg/m 2
Adhesive
FaceSheetPrepreg
AF-555M
0.39
IM7/MTM45-1
XMTA-241/PM15
0.29
IM7/MTM45-1
FM309-1M
0.39
T40-800B/5320
FM-300K
0.39
T40-800B/5320
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