Tipping a Car: Factors Affecting Curve Negotiation

  • Context: Undergrad 
  • Thread starter Thread starter Flexington
  • Start date Start date
  • Tags Tags
    Car Curve Factors
Click For Summary

Discussion Overview

The discussion focuses on the various factors that affect the tipping of a car as it negotiates a curve. Participants explore theoretical and practical aspects of vehicle dynamics, including the influence of mass, center of mass, velocity, and road conditions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants identify mass, center of mass, velocity, radius of the curve, and width of wheels as key factors affecting tipping.
  • One participant suggests the angle of the roadway relative to the center of the curve as an additional factor.
  • Another participant describes the dynamics of a car in a turn as a balance between spinning out, tipping, or remaining on the road, emphasizing the role of friction and banking in managing centripetal forces.
  • A detailed explanation is provided regarding the torques acting on a car during a turn, including the effects of centripetal acceleration and the distribution of vertical forces on the tires.
  • One participant mentions the height of suspension attachment points and the stiffness of the suspensions as potentially relevant factors.
  • The relevance of wheel width is questioned, indicating uncertainty about its impact on tipping.

Areas of Agreement / Disagreement

Participants present multiple competing views on the factors influencing car tipping, and the discussion remains unresolved with no consensus reached.

Contextual Notes

Some factors mentioned depend on specific conditions, such as the surface of the road and the dynamics of the vehicle's suspension system. The discussion includes various assumptions about vehicle behavior that are not fully explored.

Flexington
Messages
17
Reaction score
0
What factors effect the tipping of a car as it rounds a bend.

Mass, Centre of mass, Velocity, and radius of curve, width of wheels.

Am i missing anything?
 
Physics news on Phys.org
angle of roadway relative to center of curve...
 
simplistically it a fight between spinning out of a curve, tipping or staying on the road. The force of friction can hold a car in a turn at lower speeds but any faster and you need to bank a turn so that the centripetal force is directed perpendicular to the chassis of the car. This can reduce or completely nullify the force pushing the car out of the bend due to the circular motion in the first place.

http://en.wikipedia.org/wiki/Banked_turn
 
On level pavement, the outwards torque is due to the reaction force due to centripetal acceleration, times the distance from center of mass of the car to the contact patches of the tires. The opposing torque is due to the imbalance in vertical forces between the pavement and the inner tiers versus the outwards tires (this is affected if the center of mass is offset inside or outside) The limit for the outwards torque is the amount of friction at the tires. The limit for the opposing torque occurs when there is no vertical force on the inner tires and all of the cars weight is on the outer tires. If the outwards torque exceeds the limits of the opposing torque, the car tips over.

The effective amount of grip can be increased if the car hits a bump or curb or dip while sliding sideways.
 
The height of the points where the suspensions are attached to the chassis :wink:
Of course the stiffness "k" of the suspensions.

[PLAIN]http://img641.imageshack.us/img641/6240/sospensione.jpg

width of wheels... mmmh... may be relevant... don't know.
 
Last edited by a moderator:

Similar threads

  • · Replies 20 ·
Replies
20
Views
4K
  • · Replies 15 ·
Replies
15
Views
5K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 73 ·
3
Replies
73
Views
11K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 31 ·
2
Replies
31
Views
3K
  • · Replies 95 ·
4
Replies
95
Views
7K
  • · Replies 20 ·
Replies
20
Views
2K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 13 ·
Replies
13
Views
1K