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Moments at contact tyre patch and wheel spindle

by shott92
Tags: contact, moments, patch, tyre, wheel
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shott92
#1
Apr25-14, 10:26 PM
P: 6
hi guys this is an image of the rear wheel of a push bike going into a corner as well as what i think are relevant forces,
i need to calculate the moments or torque at A (the contact patch) and B (the hub centre)
this is to calculate the force on the left hand side of the frame and right hand side of the frame while in a corner
Fsr = the force going through the suspension
Fc = lateral cornering forcer on the rear wheel
phi = lean angle
MG = mass & gravity
t = the cross sectional radius of the tyre

i can and have calculated the above parameters through lot of prior equations that take into account the wheelbase, velocity, friction, radius of the turn ect. but i think that the above are the require ones to calculate this... if there is an easier way please let me know

im sure its quite simple really but i have either over thought it are just been daft

cheers for any help guys but could you please explain your reasoning behind your answer so that i can verify it please

https://s.yimg.com/hd/answers/i/7c91...&x=1398489477&
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Baluncore
#2
Apr26-14, 03:51 AM
Sci Advisor
Thanks
P: 1,949
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shott92
#3
Apr26-14, 06:18 PM
P: 6
sorry the above link doesnt work as i said thought im not 100% these are the relevant forces but i am fairly confident also tho point out this is assuming that it is a 2d diagram should be a simple moments equation really (i think) also it can be assumed the bike is stationary and that it is simple leant over with a machine applying the forces if it makes it easier to calculate...
thats the torque or moments about point A ( contact patch ) and B the wheel spindle centre
but any help would be great whether in motion stationary or anything, if you ignore the forces i have written and know another way very happy to listen to that too thanks alot guys cheers
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pic of cornering diagram.jpeg  


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