Materials for Turbine Power Blades, Reinforcements, and Resins - Hybrid Anisotropic Materials for Wind Power Turbine Blades - page 68

TABLE 3.9
Modulus.of.Elasticity.and.Coeficient.of.Thermal.Expansion.for.the.Prepreg.
Laminates.Based.on.the.IM7.Carbon.Fibers

IM7/Boron/
PEEK

IM7/Boron/
PPS Material IM7/PEEK IM7/PPS

Modulus.of.
Elasticity,.E,.
GPa/Msi

165.7/24.2 165.7/24.2 188.3/27.5 188.3/27.5

Coeficient.of.
Thermal.
Expansion,.
CTE,.PPMF

0.02 0.06 0.57 0.57

a. IM7.-60,.Matrix.-40.percent.volume.fractions.
b. 10.percent.boron.ibers.volume.fraction.

TABLE 3.10
Modulus.of.Elasticity.and.Coeficient.of.Thermal.Expansion.for.the.Prepreg.
Laminates.Based.on.the.K63712.Carbon.Fibers

K63712/Boron/
PEEK b

K63712/Boron/
PPS c Material K63712/PEEK a K63712/PPS a

Modulus.of.
Elasticity.E,.
GPa/Msi

383.4/56.0 383.4/56.0 384.7/56.2 384.7/56.2

Coeficient.of.
Thermal.
Expansion.
CTE,.PPM/F

-0.50 -0.48 0.00 0.00

a.. K63712.-60,.Matrix.-40.percent.volume.fractions.
b. 16.percent.boron.ibers.volume.fraction.
C. 19.percent.boron.ibers.volume.fraction.

3.5.4 E2-Glass

E2-glass.parameters.include:.9.oz./sq..yd.,.38.in..wide,..008.in..thick,.57×54,.
8H. satin. weave.. Frequently. speciied. in. aerospace. applications,. this. fabric.
offers.excellent.strength,.formability,.and.surfacing.characteristics..It.meets.
MIL-C-9084C,.Type.VIII-B.speciications..Typical.full.roll.length.is.125.yards,.
50.in..wide,.8H.satin.weave. 19
This. fabric. is. identical. to. part. #543,. 7781. E-glass,. but. is. preimpregnated.
with.an.epoxy.resin.system..The.material.can.be.stored,.shipped,.and.han-
dled.at.room.temperatures.and.is.cured.using.a.ramp-up.schedule.requiring,.
at.most,.310°F..Resin.content.is.27.0.to.33.0.percent. 19
Tensile.strength.and.density.of.E-.and.S-glass.are.shown.in.Table 3.11. 20