Properties of Selected Fibres

 Density (gcm-3)Longitudinal Tensile Modulus
E1
(GPa)
Transverse Tensile Modulus
E2
(GPa)
Poisson’s ratio
n12
Shear Mudulus
G12
(GPa)
Longitudinal Tensile Strength
s
(MPa)
Longitudinal Thermal Expansion
a1
(10-6 K-1)
Transverse Thermal Expansion
a2
(10-6 K-1)
Heat Resistance °C Cost $/kg
Glass2.4571710.2230350055 0.70
PBT1.58320   3100   15.00
Kevlar (49)
Kevlar (29)
1.47154
61
4.20.352.92800-454550
450
4.50
PE (Spectra)
PE (Dyneema)
0.97
0.975
66-1241
115
   2300-32502
3500
-
-12
 15012.00
PBO Zylon AS
PBO Zylon HM
1.54
1.56
180
270
   5800-6 65015.00
Graphite (AS)1.75224140.2142100-110 7.00
Graphite (HMS)1.943856.30.27.71750-110 8.00
Boron2.454204200.2170350055 54.00
SiC3.24064060.216933955.25.2 75.00
Saffil (5%SiO2-Al2O3)3.33003000.212615005.25.2 2.50
Al2O33.93853850.315414008.58.5 25.00

1Spectra 900 E=66-73GPa; Spectra 1000 E=98-113GPa; Spectra 2000 E=113-124GPa
2Spectra 900 s=2.1-2.6GPa; Spectra 1000 s=2.9-3.25GPa; Spectra 2000 s=2.9-3.5GPa
PBT = Poly(p-phenylene-2,6-benzobisthiazole)
PE = Gel Spun ultra high molecular weight polyEthylene (Spectra®,Dyneema®)
PEN = polyEthylene Napthalate (Pentex®
PBO = Poly(p-phenylene-2,6-benzobisoxazole)

Properties of Seleced Matrices

 Density (gcm-3)Tensile Modulus
E
(GPa)
Poisson’s ratio
n
Shear Mudulus
G
(GPa)
Longitudinal Tensile Strength
s
(MPa)
Longitudinal Thermal Expansion
a
(10-6 K-1)
Glass transition
melting Point
(°C)
Cost ($/kg)
Epoxy1.543.50.331.256057.5 8.00
PolyEster1.382.50.331.235 2602.00
polyVinylEster1.53.0  60 260 (Tmax)3.00
PolySulfone
(pS)
1.252.7  10656190 (Tg)14.00
PolyPhenyleneSulfone
(pPS)
1.254.8  1355693 (Tg)
285 (Tm)
14.00
PolyEtherSulfone
(pES)
1.372.6  12955230 (Tg)14.00
PolyEtherImide
(pEI)
1.273.3  14562217 (Tg)17.00
PolyAmideImide
(pAI)
1.44.8  19763 16.00
polyAmide
(nylon)
1.362.5  100  6.00
PEEK1.33.60.371.47045143 (Tg)
334 (Tm)
18.00
Aluminium2.71690.322674*23.66602.00
Titanium4.51113.80.33 238**8.4167018.00
Magnesium1.7445.50.337.5189266504.00
Borosilicate glass2.2363.70.2128903.25 0.50


* Aluminium Alloys such as 2024, 6061 and 7075 can be used as a matrix and can be heat treated to give tensile strengths up to 550 MPa.
** Titanium alloys such as IMI 550, Ti-6Al-4V can be used as matrices and have yield strengths in the range 800 to 1500 MPa.

For shear modulus a good approximation is 3/8 of Elastic modulus.