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← Revision 13 as of 2017-05-27 01:06:35 ⇥
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| (Kevlar is a trademark of DuPont) | (Kevlar is a trademark of !DuPont) |
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| || {{attachment:kevlar.jpg}} || {{attachment:stephanie-kwolek.kevlar.jpg}} || Kevlar is a high strength aramid fiber invented by Stephanie Kwolek in the 1960s, and sold by DuPont in 1971 || | || {{attachment:kevlar.jpg}} || {{attachment:stephanie-kwolek.kevlar.jpg}} || Kevlar is a high strength aramid fiber invented by Stephanie Kwolek in the 1960s, and sold by !DuPont since 1971 || |
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| ||<-3> '''Kevlar 49 Properties''' || || 3 || GPa || breaking strength || || 124 || GPa || tensile modulus || || 1.44 || g/cm^3^ || density || || 2.08 || MYuri || specific strength || || 9.3 || km/s || longitudinal speed || || 1.4 || km/s || max transverse speed || || 220 || $/kg || cost (old citation) || ||<-3> ''resin impregnated'' || || 3.6 || GPa || breaking strength || || ? || GPa || tensile modulus || || ? || g/cm^3^ || density || |
||<-3> '''Kevlar 49 Properties''' ||<-2>'''Kevlar in matrix, WAG''' || || 3 || GPa || breaking strength || 2 || GPa || || 124 || GPa || tensile modulus || 82 || GPa || || 1.44 || g/cm^3^ || density || 1.5 || g/cm^3^ || || 2.08 || MYuri || specific strength || 1.3 || MYuri || || 9.3 || km/s || longitudinal speed || 7 || km/s || || 212 || km || 9.8 m/s² support length || 130 || km || || 3.6 || % || max strain at break || || 2.4 || % || strength/tensile || || 1.4 || km/s || max transverse speed || || 110 || $/kg || cost (old citation) || . A 14 km/s loop increases speed by 69 m/s over a 100 km descent. That is a stretch of 0.49%, 20% of the strength/tensile ratio . A 12 km/s loop increases speed by 80 m/s over a 100 km descent. That is a stretch of 0.67%, 28% of the strength/tensile ratio $ \large stretch ~ \approx ~ { \Large { { \mu ( r_2 - r_1 ) } \over { V^2 r_2 r_1 } } ~ \approx ~ { 9.64 ~ km^2/s^2 \over V^2 } } $ Kevlar [[attachment:KEVLAR_Technical_Guide.pdf | Technical Guide]] downloaded from !DuPont. Properties pdf page 9, thermal page 120 |
Kevlar
(Kevlar is a trademark of DuPont)
|
|
Kevlar is a high strength aramid fiber invented by Stephanie Kwolek in the 1960s, and sold by DuPont since 1971 |
Kevlar 49 Properties |
Kevlar in matrix, WAG |
|||
3 |
GPa |
breaking strength |
2 |
GPa |
124 |
GPa |
tensile modulus |
82 |
GPa |
1.44 |
g/cm3 |
density |
1.5 |
g/cm3 |
2.08 |
MYuri |
specific strength |
1.3 |
MYuri |
9.3 |
km/s |
longitudinal speed |
7 |
km/s |
212 |
km |
9.8 m/s² support length |
130 |
km |
3.6 |
% |
max strain at break |
||
2.4 |
% |
strength/tensile |
||
1.4 |
km/s |
max transverse speed |
||
110 |
$/kg |
cost (old citation) |
||
- A 14 km/s loop increases speed by 69 m/s over a 100 km descent. That is a stretch of 0.49%, 20% of the strength/tensile ratio
- A 12 km/s loop increases speed by 80 m/s over a 100 km descent. That is a stretch of 0.67%, 28% of the strength/tensile ratio
\large stretch ~ \approx ~ { \Large { { \mu ( r_2 - r_1 ) } \over { V^2 r_2 r_1 } } ~ \approx ~ { 9.64 ~ km^2/s^2 \over V^2 } }
Kevlar Technical Guide downloaded from DuPont. Properties pdf page 9, thermal page 120