What is Slip angle ? | How lateral force is generated ? | What is self aligning moment ?
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- Опубліковано 8 лют 2025
- The vehicle turns because of applied Lateral tire forces . While turning the tire experience a centrifugal or inertial force, which lead to the deformation of tire tread at bottom contact patch and their is the generation of forces and moments.
In this video you will learn :-
1) What is Slip angle and how it is produced ?
2) How deformation takes place at bottom contact patch of tire ?
3) What is Lateral force and how it is generated ?
4) What is Self aligning toque and how it is produced ?
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The value of lateral force shown here ,
Fy= μy *W (This is the maximum value of lateral force and further increase in centrifugal force will make the car to skid) (μy - coefficient of friction in y direction)
Bro, I even said you this on your brush tire model, that Please speak slowly. Where are in rush in your videos? I am sure it takes much of your efforts and time, but please speak slowly. Hold your horses, your content is damn good and it has to have multiple runs before understanding completely. Request!
@@RahulSharma-oc2qd Thanks for the feedback ! Check out my latest videos, I am working on my pace.
@@RahulSharma-oc2qd dude, there is ×0.5 option, are u dumb?
@@lawndown4350 🤣🤣🤣🤣🤣... You are way too ethical for this platform bro.. try stepping down to some of your *level* platform.. Dumbass... there is a cat in a hells chance you would learn anything from here.
Understanding stuff like this is what can make or break a lap time in real life and in racing games. I use my understanding of lateral force, sweep angle, and slip angle to crank out crazy fast lap times on Gran Turismo 7.
this is like the fifth video i've watched on this topic bc i don't understand, but i think i finally get it now
The Actual Heading Direction arrow drawn at 3:16 is very misleading. Surely it should lie somewhere between the tyre centreline and the vertical line. Showing it as you do suggests that when steering the wheel to the right of its original direction the tyre actually travels to the left of its original centreline!
Or am I misunderstanding the diagram?
I have the same doubt can alpha the slip angle be greater than the delta the steering angle as shown in the diagram?
Since he is taking a right turn, the treads in the contact patch will remain the same where as the other treads will twist in the direction of the turn and that too to the right of the centerline not left as he has drawn. Thtas what I think
thanks. This helped me in designing car steering control for my Game developing in unreal engine
Thanks a lot for clearing my doubt
Glad it helped!
Does the lateral force Fy acts through the centre of the wheel?
Please can you make a video on how to design steering using Ackerman steering geometry
Great explanation.
Splendid Work 🔥
Thank you !
Hi guys, is this slip angle the main principle of the side slip tester in the vehicle inspection station?
Is the lateral force the same as cornering force?
Very good video !
Is the green arrow a force ? Is slip angle showing the direction of the force ?? Or it just shows the direction?
Hi Vastal, Can you suggest me a good book to understand the basics ? I am super new to this stuff.
Amazing explanation. Short, concise, clear!! Just one bit of criticism: If you could remove the logo from the mouse pointer, it would make the explanation clearer. You can still keep the logo in the top right corner of the video if you'd like. Thanks again though!
Thank you !
I removed the logo ,check my latest videos.
great 👍
Thank you
So we need small or big slip angle ?
Depends on the tire model.
Awsome videos sir.....
You are great I'm sure your channel will soon catch a pace and will boom with millions of subscribers...
Ur content is damn good 🦋
Thank you so much !
Hi! Thank you for your videos man, nice job.Q: What do you think that would be the best way to determine experimentally the cornering stiffness coefficients for a small prototype (Jet racer) that has wheels with no datasheet?
did u find out? i want to do that too
if delta is the steering input angle how can theeta be mote than that ???
If you are talking about steering wheel input angle and the steering angle of wheel, then greater or less it all depends on Steering and steering gearbox ratios.
Sir how the shape can be deformed when Fy is already balanced by Fc? And hence there shudnt b the curve formation in that manner. I knw I m missing out on something that's y I am here to seek ur help.
Fc is the centrifugal force acting at center of gravity. Fy and Fx are acting at contact patch, due to which their is the deformation of tire bottom patch.
@@thevatsaljain I buy ur explanation sir but still that doubt persists coz if two forces nullify each other then still will it b able to cause its own impact?
@@rmrgit Centrifugal force and Cornering force are not colinear. When looked from the top Cornering force is behind the centrifugal force by a distance x known as pneumatic trail.
nice
Thanks
Jevol provides the complete solution for vehicle inspection center, workshop.
I didn't understand why the lateral force is at some distance from the centre axis?
Your tire experiences deformation under the load of the vehicle. This is what produced the contact patch. While cornering lateral forces are present throughout the contact patch, in free body diagrams the single lateral force vector shown is a resultant. This resultant doesn't occur directly on the wheel center for a number of reasons that are all mostly related to the tire material and how lateral forces act across the contact patch.
Pay attention! μy can be over 1 untill normaly 4, because there is no friction! There is micro gearing!
Bro can you please not put ur logo on while writing it just deviates the purpose and distracting otherwise videos are great
The editing of upcoming video is done now !
So will be changing from further videos .
Thanks for sharing your views.
@@thevatsaljain thanks ✌️
centrifugal is a fictitious force
Umm...
Does "Lareral Force" means "Cornering Force"???
I'm so confused beacause of concept of both of them.
There is no force called Cornering Force. When you want to turn, there are 2 things that will be consider:
1. Slip Angle (which cause when you suddenly change direction. Relevant to Lateral force. Here Lateral Force + Longitudinal Force will make your vehicle turn in a curve - of course there will be slip -> reason for the name Slip Angle)
2. Camber Angle: when you turn right for example, your center of mass will lead to left side a little bit and then go to right side->Lateral force will be created
Just information from this channel.
guys what is the meaning of slip ratio
Tire speed vs. Rim speed, vital to understand in regards to generation of longitudinal forces
Is lateral force an effect of slip or is it the cause of slip?
The velocity vector through your center of gravity is directly on the longitudinal axis when driving in a straight line. When steering angle is introduced on the front axle the velocity vector comes off of the longitudinal axis. The angle between the axis and the vector is the body sideslip angle. This sideslip causes a deformation in the tire contact patch and results in slip angles on your tires. These slip angles on the contact patch generate lateral force
So body sideslip causes slip angles which cause lateral force
Typical. Not explaning the thing to be explained(why the fuck Fy is not on the same line with Fc?) but draws figures and explain only the mathematical relation which is easy to understand and tell. Ps: im not asking you to explain it. You cant. But the real problem is, why you(or any teacher/professor) skip the most important parts on any matter? Is creating a free body diagram more simple than the mathematical explanation? I just want to understand this common behaviour that doesnt change with race or culture. If anyone has an answer or even an idea/theory or knows some research on this human behaviour it would be much appreciated.
Thanks for the feedback !
You told me not to explain but still I am giving you the explanation!
This will help you !
I think you don't know the fact that tire material is viscoelasticity and it has asymmetric load distribution which causes the shift of the load on the tire away from the central lines in x,y and z directions due to hysteresis loss.
In this video ua-cam.com/video/DOK_MJyCzBM/v-deo.html
I explained about the load distribution in front view of the tire which causes the rolling resistance, the same happens with the bottom patch of tire which causes asymmetric distribution due to loading and unloading of tire.
Check that video ,I think it will help you to understand some basic facts about tire.
@@thevatsaljain Spot on.. a gist of combining the load distribution theory and the free body diagram...
@@thevatsaljain thanks for addressing this point but I am a bit confused that for rolling resistance case the reaction load shifts in the direction of travel ( ahead of the static patch) but in cornering it is shifting behind the static patch. Can you explain this. Thank you