coefficient of rolling friction

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coefficient of rolling friction

[¦kō·ə′fish·ənt əv ′rōl·iŋ ′frik·shən]
(mechanics)
The ratio of the frictional force, parallel to the surface of contact, opposing the motion of a body rolling over another, to the force, normal to the surface of contact, with which the bodies press against each other.
References in periodicals archive ?
The SC20+ model combines all the advantages of its predecessors: Thanks to the new Plus compound, the tires offer higher mileage like the SC20 Mileage+ with low rolling resistance like the SC20 Energy+.
A variety of analytical and computational methods exists for calculating the indentation rolling resistance of conveyor belts.
The use of different speed ranges in the latter method is evaluated, along with examining modelling assumptions regarding the speed dependence of rolling resistance and mechanical drive-line losses.
Kauzlarich and Thacker demonstrated via both component and system analysis that rolling resistance is related to tire material, wheel radius, profile radius, and load on the wheel base [10].
The functionalised SSBR grade displays improved polymer/filler interaction in the tread mix, which reduces hysteresis and therefore the rolling resistance of the tyres.
This lower rolling resistance leads to improved fuel consumption, lower CO2 emissions and in the case of pure electric engines, an extended range of operation.
According to the company, the PROPEL E7 carbon black is designed to enable tires with lower rolling resistance without sacrificing tire durability.
Experts estimate that the worldwide market for low rolling resistance tires will grow by a solid 18 percent each year over the next five years.
If you can improve a car's rolling resistance by one grade - say from C to B - you improve the rolling resistance by 10 per cent to 12 per cent, so that would mean you would save 0.
Its production is in response to the new tyre labelling legislation introduced last November and with its BA rating - B for rolling resistance and A for wet grip - it takes the company closer to the ultimate AA rating manufacturers aim to get into production as soon as possible.
Rolling resistance accounts for another 13 percent to 16 percent of energy losses for the average Class 8 truck travelling at highway speeds and 8 percent to 12 percent of energy losses for Class 8 trucks operating in the city.
Nd-PBR is used in the treads and sidewalls of a tyre as it helps reduce the rolling resistance and increase the fuel efficiency.