Paper Number 7.1
ASTM Committee F09.30
Task Group
Update on Commercial Truck/Bus Tire
Test Practice Development
James A. Popio[1],
Smithers Scientific Services, Inc.
Email: jpopio@smithersmail.com
Voice: (330) 297-1495
Fax: (330) 297-0038
1) An algorithm to determine “highway
equivalency” for laboratory roadwheel testing to replicate road operating
temperatures,
2) A standardized laboratory endurance
test method, and
3) A standardized laboratory high speed
test method.
These developed practices are based upon fourteen representative tires from
long-haul, bus, mixed service, regional, and urban commercial truck
applications.
The results of the laboratory and field experiments allowed for adequate
understanding of the severity that tires are subject to on a 1.7m roadwheel in
the laboratory, where on average center rib temperatures were 44% higher than
on the road. These experimental
observations resulted in mathematical algorithms that allowed the creation of
test conditions that can be used to evaluate tire performance on a roadwheel that
minimize atypical test removal conditions.