. Lightness is no good if it breaks in a year and you have to replace sections is it? A balance between being stiff and light with enough wall thickness to keep the bend out of it after 40’ feet is key to good design. Kevlar Ultra high mod 63 msi ? what are these terms
Table – Properties of Common Carbon Fiber
Laminate Designs vs. Metals
Material Grade / Type Design / Application
Longitudinal Tensile Strength
(ksi) Longitudinal Tensile
Modulus
(Msi) Shear Modulus
(Msi) Density
(g/cm^3)
Carbon Fiber/Epoxy (Unidirectional) Standard
Modulus Bending 300 15 0.6 1.55
Carbon Fiber/Epoxy (Unidirectional) Standard
Modulus Torsion 20 2.2 4.5 1.55
Carbon Fiber/Epoxy (Unidirectional)
Intermediate Modulus Bending 325 20 0.6 1.57
Carbon Fiber/Epoxy (Unidirectional) High
Modulus Bending 250 30 0.6 1.59
Carbon Fiber/Epoxy (Unidirectional) Ultra High
Modulus Bending 200 45 0.6 1.70
Steel 4130 100 30 12 7.7
Titanium 6M-4V 120 16 6.2 4.34
Aluminum 6061-T6 35 10 3.8
sim are utltra High Modulus 63 msi
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