Magnitude of radial stiffness provides
a structural comparison between
CFCD material and traditional
materials.
Similar magnitude of radial stiffness
indicates similar edge deflection from
load.
Radial stiffness of CFCD001-1000A- R02 to R12 and CFCD001-2000A-R02 to R12
compared with Aluminum and Steel. For applications where the thickness is not an issue
the composite disc has adequate stiffness compared to traditional materials over a large
range of traditional material thicknesses.
ACI has prepared a table of some closely matching values of radial stiffness comparing
Aluminum and Steel. By varying the number of carbon layers within a CFCD material a
close stiffness match can by obtained.
1.152" Thick
|
3/4" Thick
|
1/2" Thick
|
WCD001-1000A-R02
|
Aluminum
|
Steel
|
lbs-in^2
|
lbs-in^2
|
lbs-in^2
|
329,254
|
407,577
|
324,547
|
The Stiffness of a WCD001-1000A-R02
composite disc material matches fairly
closely with the stiffness of 3/4" thick
Aluminum and 1/2" thick Steel disc.
It should be brought to the readers attention that the stiffness of the composite disc
material can simply be increased by increasing the number of Carbon Layers.
| |
1.152" Thk.
|
3/4" Thk.
|
1/2" Thk.
|
| |
WCD001-1000A
|
Aluminum
|
Steel
|
Laminates
|
lb-in^2
|
lb-in^2
|
lb-in^2
|
R02
|
329,254
|
407,577
|
324,547
|
R04
|
530,313
|
407,577
|
324,547
|
R06
|
735,745
|
407,577
|
324,547
|
R08
|
910,911
|
407,577
|
324,547
|
R10
|
1,133,654
|
407,577
|
324,547
|
R12
|
1,134,323
|
407,577
|
324,547
|
The reader should note that
WCD001-1000A-R04 composite
disc material exceeds the
stiffness of a 3/4" aluminum disc
by over 100,000 lbs.in^2
Increasing disc stiffness by increasing the number of Carbon Layers has hardly any
effect on composite disc material inertia. A table has been included showing inertia
for two composite disc's 36" and 60" diameter. The table shows little change in inertia
by the addition of carbon layers from R02 to R12.
