The Effects of Five Basic Design and Construction Parameters on Radial Tire Rolling Resistance and Cornering Force

1983 ◽  
Author(s):  
Steve L. Walter
Keyword(s):  
Rolling Resistance ◽  
Basic Design ◽  
Radial Tire ◽  
Design And Construction

Evolving the Banded Radial Tire

1987 ◽  
Vol 15 (1) ◽  
pp. 30-41 ◽  
Author(s):  
E. G. Markow
Keyword(s):  
Finite Element ◽  
Wear Rate ◽  
Finite Element Modeling ◽  
Laboratory Tests ◽  
Rolling Resistance ◽  
Two Dimensional ◽  
Theoretical Discussion ◽  
Radial Tire ◽  
Puncture Resistance ◽  
Element Modeling

Abstract Development of the banded radial tire is discussed. A major contribution of this tire design is a reliable run-flat capability over distances exceeding 160 km (100 mi). Experimental tire designs and materials are considered; a brief theoretical discussion of the mechanics of operation is given based on initial two-dimensional studies and later on more complete finite element modeling. Results of laboratory tests for cornering, rolling resistance, and braking are presented. Low rolling resistance, good cornering and braking properties, and low tread wear rate along with good puncture resistance are among the advantages of the banded radial tire designs.

American Railroad Freight Cars: 100 Years of Progress, 1920-2020

2020 ◽  
Author(s):  
Shaun Richmond
Keyword(s):  
White Men ◽  
Important Change ◽  
100Th Anniversary ◽  
Fe Analysis ◽  
Rail Transportation ◽  
Basic Design ◽  
Freight Car ◽  
Electronic Instrumentation ◽  
Railroad Freight ◽  
Design And Construction

Abstract This paper was written to commemorate the 100th anniversary of the ASME Rail Transportation Division, which was founded in 1920 and held its first meeting in St. Louis. It attempts to paint a picture of the U. S. railroad freight car and the engineering processes involved in its design and construction in 1920 and compare this with today’s designs and practices. Progress in freight car design has been evolutionary rather than revolutionary. The steel freight car had largely replaced its wooden predecessor by 1920 and the basic design of many cars was already in place. Exceptions being the Spine Car and the Well Car, which were entirely unknown in 1920. The Box Car has diminished greatly in importance and more specialized cars are now common. One important difference is that welding is now used extensively in freight car construction whereas in 1920 riveting was almost universal. An important change is the availability of electronic instrumentation to measure, record and analyze the load environment of cars. This has allowed the development of performance-based specifications and these have largely replaced the prescriptive standards used in 1920. CAD and FE analysis have revolutionized the way in which cars are designed, allowing much more refined analysis which has led to far lighter car designs. In 1920 virtually all Engineers were white men — this too is changing.

A Study on Minimum Rolling Resistance

2012 ◽  
Vol 40 (4) ◽  
pp. 220-233
Author(s):  
Timothy B. Rhyne ◽  
Steven M. Cron
Keyword(s):  
Experimental Data ◽  
Energy Loss ◽  
Fuel Consumption ◽  
Functional Relationship ◽  
Rolling Resistance ◽  
Pneumatic Tire ◽  
Radial Tire ◽  
Functional Relationships ◽  
Analytical Expressions ◽  
Current Paradigm

ABSTRACT: Tire rolling resistance has been a topic of study since the invention of the pneumatic tire. There is currently a heightened interest in this topic because of the need to minimize fuel consumption of vehicles and the introduction of regulations regarding both the maximum allowable rolling resistance and consumer labeling for rolling resistance. The question arises as to how low tire rolling resistance can go. Tire energy loss can be written as the product of the material deformations, the volume of material deformed, and the loss property of the material. The last two terms of the energy loss equation will be considered fixed. This article concentrates on the deformation term. The current paradigm of the steel-belted radial tire is assumed. The minimum deformations required for the function of the tire are established, and the assumption is made that all other deformations are parasitic and can in theory be eliminated. Analytical expressions for the dominant necessary deformations are developed, and the functional relationship for minimum rolling resistance is determined. The functioning point required to reach the minimum rolling resistance is established. The functional relationships are compared with experimental data taken by the whole tire hysteresis method.

Analytical Method of the Rolling Resistance of Radial Tire Base on ANSYS

2012 ◽  
Vol 501 ◽  
pp. 259-262
Author(s):  
Ze Peng Wang ◽  
Jia Na Ke ◽  
Lian Xiang Ma
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Fuel Economy ◽  
Structural Design ◽  
3D Model ◽  
Rolling Resistance ◽  
Element Model ◽  
Simulation Method ◽  
Radial Tire ◽  
Analytical Result

Rolling resistance can impact on the fuel economy and dynamics of automobile. Numerical simulation can predict the rolling resistance and reduce the experimental cost. So, a simulation model was established base on ANSYS to compute the rolling resistance. Firstly, the 3D model finite element model of a radial tire was setup to solve the strain and stress of a rolling tire. Secondly ,the temperature field of tire was analyzed in line with the analytical result of the strain and stress. Thirdly, the rolling energy loss was calculated to solve the rolling resistance. The simulation method is conducive to the structural design of tire and computation or prediction of the rolling resistance of tire.

Live coal storage structure, Genesee Generating Station

1990 ◽  
Vol 17 (6) ◽  
pp. 1033-1043
Author(s):  
C. E. Chan ◽  
R. L. Martin ◽  
D. Weinreb ◽  
D. R. Trowsdale
Keyword(s):  
Monitoring Program ◽  
Earth Pressure ◽  
Field Measurements ◽  
Basic Design ◽  
Storage Structure ◽  
Soft Clays ◽  
Construction Methods ◽  
Reinforced Earth ◽  
Overall Stability ◽  
Design And Construction

The development, by Edmonton Power, of the Genesee Generating Station has necessitated construction of a 40 000-t live coal storage structure. The live storage is a 170 m long coal slot based 17 m below grade. It comprises a concrete U box and inclined reinforced earth sidewalls. The site is underlain by soft clays, which posed special problems for design and construction. Analytical and construction methods were developed to suit the geotechnical and site constraints. A monitoring program was instituted during construction to verify the design assumptions and to confirm the overall stability. This paper reviews the decisions involved in the basic design of the structure, and methods of dealing with design and construction problems. Key words: excavation, struts, earth pressure, reinforced earth, field measurements.

Computation of rolling resistance caused by rubber hysteresis of truck radial tire

2007 ◽  
Vol 8 (5) ◽  
pp. 778-785 ◽  
Author(s):  
Gai-ling Ma ◽  
Hong Xu ◽  
Wen-yong Cui
Keyword(s):  
Rolling Resistance ◽  
Radial Tire

Basic design and construction of the Vienna FES implants: existing solutions and prospects for new generations of implants

2001 ◽  
Vol 23 (1) ◽  
pp. 53-60 ◽  
Author(s):  
Winfried Mayr ◽  
Manfred Bijak ◽  
Dietmar Rafolt ◽  
Stefan Sauermann ◽  
Ewald Unger ◽  
...  
Keyword(s):  
Basic Design ◽  
Design And Construction

A New Tire Construction Which Reduces Ply Steer

1991 ◽  
Vol 19 (1) ◽  
pp. 37-65 ◽  
Author(s):  
K. Kabe ◽  
T. Morikawa
Keyword(s):  
Wear Resistance ◽  
Cross Section ◽  
High Speed ◽  
Rolling Resistance ◽  
Circumferential Direction ◽  
Performance Characteristics ◽  
The Other ◽  
Radial Tire ◽  
New Construction ◽  
Contact Response

Abstract Currently, the main tire construction is the radial construction. The radial construction consists of a carcass layer with cords parallel to the tire cross section and a belt layer which surrounds the tire in the circumferential direction and stiffens the tread band. The radial construction has better performance characteristics than the bias construction. It has higher durability, better wear resistance of the tread, lower rolling resistance, and better performance at high speed because of the stable contact response developed by the belt ply. On the other hand, the belt construction of the radial tire causes ply steer. This ply steer is also a cause of steering pull and uneven tread wear. This paper describes a new tire construction which enables the reduction of ply steer. The new construction features the carcass cord having some angle with respect to the tire cross section and also with respect to the cord of the adjacent belt ply. It is shown that the new tire construction can significantly reduce ply steer through variation of the carcass cord angle.

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