ABSTRACT
Serge Rebouillat DuPont de Nemours InternationalS. A., Geneva, Switzerland Jimmy C. M. Peng, and Jean-Baptiste Donnet Ecole Nationale Superieure de Chimie and Universite de Haute-Alsace, Mulhouse, France Seung-Kon Ryu Chungnam National University, Taejon, Korea
Table1ComparisonofMechanicalPropertiesofVariousFiberComposites(CarbonFiberVolumeFraction,Vr=0.6 Unidirectional/Epoxy)andMetals
TensileYoung'sSpecifictensileSpecifictensileDensity strength(GPa)modulus(GPa)strength(MPa)modulus(GPa)(g/cm3)
1.382908201731.68 HMcarbonfiber1.522079741331.56 UHTcarbonfiberb1.901241242811.53 HTcarbonfiber1.52103993671.53 Aramidfiber1.38761000551.38 S-glassfiber1.8253875262.08 Boronfiber2.7624814841331.86
Metals Steel(150typec35)0.422065426.47.8 Magnesiumalloy(DTD88c)2.8042156231.80 Aluminumalloy(6061-T6)0.2669101272.56 Titaniumalloy(6A1-4V)0.98112220254.45
however, be mentioned that specific strength and stiffness are the basic characteristics which are useful in almost all applications. Carbon fibers, however, have some shortcomings as well. They are brittle, and have a low impact resistance and low break extension and very small coefficient of linear expansion. They have a high degree of anisotropy both in the direction of the fiber axis and perpendicular to it. They remain as expensive materials and can, therefore, be used only where cost is not a major factor. However, the price of these fibers is likely to decrease with increased production.
