CHASSIS AND VEHICLE DYNAMICS
Learning Objectives After completing this seminar, you will be able to:
−− Camber thrust −− Ply steer and conicity forces • Combined Longitudinal and Lateral Forces −− Friction ellipse −− Load transfer in cornering • The Tire as a Spring −− Linear vs. non-linear springs −− Rolling vs. non-rolling behavior −− Tire frequency response • Tire and Wheel Non-Uniformities −− Force and moment variations −− Low speed/high speed effects −− Tire manufacturing issues • Influences of Tire Properties on Vehicle Response −− Vehicle stopping distance −− Vehicle ride −− Vehicle handling −− Vehicle high speed performance −− European vs. North American requirements • Future Technological Developments −− Run-flat tires −− Cordless cast tires −− Intelligent tires
• Describe the most important performance parameters and operating conditions of pneumatic tires related to safety. • Use fundamental equations of engineering science to predict and/or explain tire-vehicle interactions related to safety. Who Should Attend This course is designed principally for technical professionals in the automobile, tire, and wheel industries and their suppliers. In addition, some case studies and examples involve truck, agriculture, and aircraft tires. Prerequisites An undergraduate degree in a technical field or commensurate experience is desirable. −− Vehicle accident statistics −− The role of the tire in accident prevention/causation −− Tire construction features −− Tire failure modes • Tire Grip and Related Phenomena −− Tire-road friction characteristics −− Tire braking forces −− Factors influencing vehicle stopping distance −− Combined braking and cornering −− Hydroplaning −− High speed behavior and standing waves • Brake Performance −− Front wheel/rear wheel lock-up −− Braking efficiency −− Anti-lock braking and other systems • The Tire as a Pressure Vessel −− Burst pressure −− Energy release in punctured tires −− Wheel issues −− Tire and/or wheel case studies • Over-steering Vehicles −− Meaning of under-steer coefficient −− The contribution of the tire • Vehicle Rollover Analysis Topical Outline • Introduction
Instructor: Fee: $835
Gerald R. Potts
.7 CEUs
URL:
sae.org/learn/content/c0101/
Tire and Wheel Safety Issues 1 Day | Classroom Seminar I.D.# C0102
One of the most important safety critical components on cars, trucks, and aircraft is the pneumatic tire. Vehicle tires primarily control stopping distances on wet and dry roads or runways and strongly influence over-steer/under-steer behavior in handling maneuvers of cars and trucks. The inflated tire-wheel assembly also acts as a pressure vessel that releases a large amount of energy when catastrophically deflated. The tire can also serve as a fulcrum, both directly and indirectly, in contributing to vehicle rollover. This seminar covers these facets of tire safety phenomena. Engineering fundamentals are discussed and illustrated with numerous practical examples and case studies of current public interest. “The Pneumatic Tire”, a 700-page eBook on CD, edited by Joseph Walter and Alan Gent is included in the course material. This course has been approved by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) for 7Continuing Education Units (CEUs). Upon completion of this seminar, accredited reconstructionists should mail a copy of their course certificate and the $5 student CEU fee to ACTAR, PO Box 1493, North Platte, NE 69103.
−− History of rollover −− Rollover threshold −− Tripping mechanisms −− Tire effects −− Operating conditions −− Public policy issues
Instructor: Fee: $835
Gerald R. Potts
.7 CEUs
URL:
sae.org/learn/content/c0102/
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