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Low Speed Enveloping Test with Perpendicular and Inclined Cleats
- Ground Vehicle Standard
Published November 20, 2018 by SAE International in United States
Downloadable datasets availableAnnotation ability available
This SAE Recommended Practice describes a test method for measuring the forces and moments generated at a spindle when a tire rolls over a rectangular obstacle, cleat, at very low speed. The cleat used in a particular test condition is configured with its crest either perpendicular, 90 degrees, to the path of the tire or optionally with its crest inclined at an angle to the path of the tire. The carriage to which the spindle is attached is rigidly constrained in position during each test condition so as to provide a good approximation to fixed loaded radius operation. The method discussed in this document provides cleat envelopment force and moment and tire angular position histories as functions of distance traveled. These histories are essentially free from variations due to tire non-uniformities. The method applies to any size tire so long as the equipment is properly scaled to conduct the measurements for the intended test tire. The data are suitable for use in determining parameters for road load models and for comparative evaluations of the measured properties in research and development.
NOTE: Herein, road load models are models for predicting forces applied to the vehicle spindles during operation over irregular surfaces, paved or otherwise. Within the context of this document, forces applied to the road or terrain surface are not considered.
This technical report is being Stabilized because it covers technology which is mature and not likely to change in the foreseeable future.
|Ground Vehicle Standard||Dynamic Cleat Test with Perpendicular and Inclined Cleats|
|Ground Vehicle Standard||Tire Quasi-Static Envelopment of Triangular/Step Cleats Test|
Data Sets - Support Documents
|Unnamed Dataset 1|
|Table 1||Symbols defined|
|Table 2||Minimum load cell capacities based on force and moment|
|Table 3||Design load cell capacity example|
|Unnamed Dataset 5|
|Table 4||Data file layout|
Vehicle Dynamics Standards Committee
The Vehicle Dynamics Standards Committee (VDSC) reports to the Vehicle Performance Steering Committee. The VDSC develops Information Reports, Recommended Practices and Standards related to the dynamics of passenger cars and light trucks, excluding trailers. The committee establishes tests and analyses that contribute to the understanding of the ride and handling performance of the total vehicle as a dynamic system.
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