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Originally Posted by Mustangman25
I agree...the formular you used is supposed to be for a completely solid disc with the mass of the disc evenly distributed throughout, something that most rims, much less the blingly aftermarket rims I assume you're using here do not come close to having.
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A little background on the purpose of the study. We currently supply aftermarket wheels to a number of dealers and automotive dealerships such as toyota. currently the hot car is the Toyota fortuner (asian domestic maket suv, slightly huger than a 4runner) which we fit with 20 and 22 inch wheels.
there was a news item in thailand where a customer was claiming warranty on a set of cracked brake pads. upon taking them to the dealership, they refused his claim and blamed the upsized 20 inch wheels as the source of the pads cracking. The whole point of this paper is to show that upsized wheels do no overstress the braking components even with bigger wheels.
alsator, hmm you do have a point on the whole sprung unsprung weight. thought about it a little bit more and yea the rbakes carry everything moving including the suspension bits.
"The quantity derived is actually in joules, the unit for work (using one Newton of work to push and object one meter).
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I do not agree. Torque and work are not equivalent, and therefore the units are not interchangeable without proper conversion."
I've browsed a couple of sites and they do relate Nm to joules directly
http://www.unc.edu/~rowlett/units/dictN.html
while they have the same units, the application is different, anyway that i can relate the two?