Heating up of tyres on the road

Thread starter vcsharp2003
Start date Jan 18, 2023
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Friction force Heat Heating

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SUMMARY

The heating of car tyres during operation is primarily caused by the continuous deformation of the rubber, which generates heat through hysteresis. While static friction is present, it does not contribute to heat generation; instead, rolling resistance, defined as the energy loss due to deformation, is the main factor. The discussion highlights that rolling resistance encompasses various causes, including the misalignment of forces at the axle and contact patch. Understanding these mechanisms is crucial for optimizing tyre performance and longevity.

PREREQUISITES

Understanding of rolling resistance and its components
Familiarity with hysteresis in viscoelastic materials
Knowledge of thermodynamics related to energy conversion
Basic principles of friction and deformation in materials

NEXT STEPS

Research the mechanics of rolling resistance in tyres
Study the viscoelastic properties of rubber and their impact on heat generation
Explore thermodynamic cycles related to mechanical energy conversion
Investigate the effects of tyre pressure on performance and heat generation

USEFUL FOR

Automotive engineers, tyre manufacturers, and anyone interested in the physics of vehicle dynamics and tyre performance optimization.

Jan 19, 2023

Lnewqban

Homework Helper

Gold Member

When the asphalt is very hot, a lot of heat is transferred into the tires and the internal pressure increases.
When it is raining, the tires cooldown and the internal pressure decreases.

Strong braking and acceleration, as well as cornering, also transfer heat into the tires.

Internal friction of tube against carcass, or even inside delaminating plies of a damaged carcasse, also increases temperature of the tire.

A normal tire can become very hot (to the point of destruction) simply by underinflation combined with high static (weight) and dynamic (speed associated) loads.