J2731_201205 Low Speed Enveloping Test with Perpendicular and Inclined Cleats

Revised

05/23/2012

Features
Issuing Committee
Scope
Content
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°, 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.
Rationale
Content
J2731 is being revised to correct editorial changes in paragraph 10.3 and 10.4.2.
Meta TagsDetails
DOI
https://doi.org/10.4271/J2731_201205
Pages
12
Citation
SAE International Recommended Practice, Low Speed Enveloping Test with Perpendicular and Inclined Cleats, SAE Standard J2731_201205, Revised May 2012, Issued November 2006, https://doi.org/10.4271/J2731_201205.
Additional Details
Publisher
Published
May 23, 2012
Product Code
J2731_201205
Content Type
Recommended Practice
Status
Revised
Language
English