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Asesino
03-18-2013, 11:18 PM
Hello
We are in the initial phase of designing our FSAE vehicle.We don't have proper info of calculating and distributing forces on uprights and hubs.If anyone has info regarding this.....plz reply.
Thanks.
MCoach
03-18-2013, 11:28 PM
Start with a free body diagram.

You have forces generated by your wheel and these are reacted into your upright and then into the control arms, damper, and bearings. Estimate starting from accelerations and then calculate your forces based on your tire, upright package and control arm geometry.
Asesino
03-18-2013, 11:59 PM
Thanks Sir
We are calculating forces individually in acceleration, braking, cornering etc. If you have some images,texts or links related to this, It will be helpful for us.
Thanks
Jay Lawrence
03-19-2013, 03:12 PM
No problem, would you like us to clean your room and cook your food as well?

This forum is full of images/texts/links related to this. Just look.
Claude Rouelle
03-19-2013, 08:03 PM
Asesino,

What don't you already show YOUR FBD, sketches, calculations, graphs... and we could go from there.

Let me guess (again).... India?
Asesino
03-21-2013, 10:49 AM
claude sir,
here is FBD of upright in static condition.In this
weight of car= 300kg with factor of safety=2.
weight of calliper= 2kg
self weight of upright+bearing= 1.5kg
Is it correct?
in case of acceleration/braking/cornering lateral load also acts through A-arms.what method is used to calculate these forces?
https://www.facebook.com/photo.php?fbid=537979962913549&set=a.299740716737476.75470.100001046499007&type=1&theater
Claude Rouelle
03-21-2013, 11:33 AM
Do you know what is a FBD?
Asesino
03-21-2013, 01:10 PM
sorry sir .....now image is visible
Claude Rouelle
03-21-2013, 01:29 PM
I did not send you or post any image (I am trying to stay calm here....)
Asesino
03-21-2013, 02:10 PM
sir,
i mean to say that my post(image of FBD) is visible now. You can examine it now. It is at the end of my 3rd post.
Claude Rouelle
03-22-2013, 07:25 AM
A bit too simplified. What about lateral and longitudinal forces (or combined: one day one wheel will hit a bump while cornering and braking or accelerating) as well as My,(braking accelerations) Mx and Mz moments?
What about coordinates in 3D? What about not only inboard and outboard coordinates? Start for the tire forces and moment and go back towards your chassis to calculate forces intensity and direction on each upright point and each chassis pick up points.