Tyre Dynamics

[mach11]

Hi All,

Was just wondering about how forces act on the tire...



Hope the picture is clear. How does the longitudinal force act on the tyre. If i have to simulate the load acting on the tire then how can I do it?

[strad]

Oh God No...not another tire talk.

[Jersey Tom]

Look back at your picture. Can you read it? I sure can't.

Beyond that I don't know about the approach saying longitudinal forces acting ON the tire. The TIRE generates forces, which are reacted by the chassis - not the other way around (vertical excepted)

[Belatti]

The tire generates forces... magically!!!

No, there is a force acting on the tire and reacting on the tarmac. Newton said that and I believe him, most of the times.

Now, you can decompose the force acting on the tire, anyway you want. Usually is fine to use 3 (vertical, longitudinal and lateral)

[mach11]

For a little bit more clarity

http://www.mts.com/ucm/groups/public/do ... 002014.pdf

Here the analysis on the suspension system is done by simulating the vertical forces, lateral forces and longitudinal forces on the suspension and wheel assembly.

I would like to know real time events which are being simulated. Vertical and lateral i do agree with the fact that, the forces acting normally to the vehicle when the car is moving and lateral when the car takes a turn due to load transfer or steering torque.

What I would like to know is which event simulates the longitudinal direction.

[Jersey Tom]

Where does longitudinal force come from? Torque, man. You step on the throttle, the engine loads up, you have torque going through the drive shafts, into the wheels, and it is reacted as a longitudinal force from the tire.

[mach11]

Hey Tom,

Thanks for the clarification. I guess I was mistaken by what I have been reading.