7.1.2.2 Carbon/Epoxy This is used in wing box,horizontal stabilizers,fuselage,ailerons,wings,spoilers (air brakes)vertical stabilizers,traps,and struts. ■Pluses: High rupture resistance Very good fatigue strength Very good heat and electricity conductor High operating temperature (limited by the resin) No dilatation until 600C Smaller specific mass than that of glass/epoxy ■Minuses: More delicate fabrication Impact resistance two or three times less than that of glass/epoxy Material susceptible to lightning 7.1.2.3 Boron/Epoxy This is used for vertical stabilizer boxes and horizontal stabilizer boxes. ■Pluses: High rupture resistance High rigidity Very good compatibility with epoxy resins Good fatigue resistance ■Minuses: Higher density than previous composites? Delicate fabrication and forming High cost 7.1.2.4 Honeycombs Honeycombs are used for forming the core of components made of sandwich structures. ■Pluses: Low specific mass Very high specific modulus and specific strength Very good fatigue resistance ■Minuses: Susceptible to corrosion Difficult to detect defects See Section 3.3.3. 2003 by CRC Press LLC7.1.2.2 Carbon/Epoxy This is used in wing box, horizontal stabilizers, fuselage, ailerons, wings, spoilers (air brakes) vertical stabilizers, traps, and struts.
Pluses: High rupture resistance Very good fatigue strength Very good heat and electricity conductor High operating temperature (limited by the resin) No dilatation until 600∞C Smaller specific mass than that of glass/epoxy
Minuses: More delicate fabrication Impact resistance two or three times less than that of glass/epoxy Material susceptible to lightning 7.1.2.3 Boron/Epoxy This is used for vertical stabilizer boxes and horizontal stabilizer boxes.
Pluses: High rupture resistance High rigidity Very good compatibility with epoxy resins Good fatigue resistance
Minuses: Higher density than previous composites2 Delicate fabrication and forming High cost 7.1.2.4 Honeycombs Honeycombs are used for forming the core of components made of sandwich structures.
Pluses: Low specific mass Very high specific modulus and specific strength Very good fatigue resistance
Minuses: Susceptible to corrosion Difficult to detect defects 2 See Section 3.3.3. TX846_Frame_C07 Page 137 Monday, November 18, 2002 12:17 PM © 2003 by CRC Press LLC