Analysis and Computation of Energy Loss in Radial Tires

1984 ◽  
Vol 12 (1) ◽  
pp. 3-22 ◽  
Author(s):  
M. K. Chakko
Keyword(s):  
Structural Analysis ◽  
Energy Loss ◽  
Computer Program ◽  
Analytical Model ◽  
Material Properties ◽  
Rolling Resistance ◽  
Basic Material ◽  
Simple Analytical Model ◽  
Automobile Tire ◽  
Parametric Studies

Abstract A comprehensive but simple analytical model for predicting the energy loss in radial tires is presented. Using approximate structural analysis, the model relates the basic material properties and construction variables of the tire to its energy loss or rolling resistance. The formulas developed were computer-programmed, and the tire rolling resistance and its distribution among the components of a typical radial automobile tire were computed. The significant contributions to rolling resistance were from tread compression, carcass cord extension and bending, and sidewall rubber bending. Parametric studies using the computer program were carried out to obtain the trends in rolling resistance due to changes in several tire material properties and construction variables. The computations also showed the existence of locally optimum values for the tread modulus, carcass cord modulus, and carcass cord end count which minimize the tire rolling resistance.

Effect of Material Properties on Tire Performance Characteristics—Part I. Tire Cords

1987 ◽  
Vol 15 (3) ◽  
pp. 198-206 ◽  
Author(s):  
S. Futamura
Keyword(s):  
Wear Resistance ◽  
Material Properties ◽  
High Speed ◽  
Rolling Resistance ◽  
The Body ◽  
Performance Characteristics ◽  
Automobile Tire ◽  
High Severity ◽  
Test Conditions ◽  
Polyester Cord

Abstract The effect of modulus of tire cords in stabilizer and body plies on the performance of a radial automobile tire is discussed. Cord modulus was varied systematically by using polyester, rayon, and aramid materials. High speed, endurance, and plunger energy were not effected. Rolling resistance was higher with aramid cord than with polyester cord in the body ply, but there was no effect of cord material in stabilizer plies. Increase of cord modulus in the stabilizer ply, however, did produce significantly higher cornering coefficient. Wear resistance was also higher, especially under high severity test conditions.

Effect of Material Properties on Tire Performance Characteristics — Part II, Tread Material

1990 ◽  
Vol 18 (1) ◽  
pp. 2-12 ◽  
Author(s):  
S. Futamura
Keyword(s):  
Energy Loss ◽  
Dynamic Property ◽  
Material Properties ◽  
Rolling Resistance ◽  
Performance Characteristics ◽  
Maximum Correlation ◽  
Deformation Index

Abstract This report, on the effect of tread materials on tire performance, continues the study in Part I [1] on the analogous effects of cords. A new “deformation index” concept for the characterizing energy loss is proposed. Principles are developed for maximum correlation of this index to rolling resistance, wet and dry traction, ice traction, and cornering force. The deformation index is used to determine the dynamic property most relevant to each of these tire functions.

Total Tire Energy Loss Comparison by the Whole Tire Hysteresis and the Rolling Resistance Methods

1995 ◽  
Vol 23 (4) ◽  
pp. 256-265 ◽  
Author(s):  
P. S. Pillai
Keyword(s):  
Energy Loss ◽  
Rolling Resistance ◽  
Hysteresis Loss ◽  
Basic Premise ◽  
Resistance Method

Abstract Energy loss per hour in a tire traveling at 80 km/h was obtained for a number of tires of different sizes and makes from the respective whole tire hysteresis loss of each tire. This loss value was then compared to the corresponding rolling loss obtained from the 1.7 m dynamometer rolling resistance method. The two methods agreed, indicating that the basic premise of the rolling resistance hysteresis ratio relation is valid.

Design of Low Rolling Resistance Tire Structure Based on Region Energy Loss

2018 ◽  
Vol 11 (2) ◽  
pp. 135-145
Author(s):  
Guolin Wang ◽  
Xu Wu ◽  
Chen Liang ◽  
Jian Yang
Keyword(s):  
Energy Loss ◽  
Rolling Resistance

Convective Losses From Cavity Solar Receivers—Comparisons Between Analytical Predictions and Experimental Results

1983 ◽  
Vol 105 (1) ◽  
pp. 29-33 ◽  
Author(s):  
A. M. Clausing
Keyword(s):  
Experimental Data ◽  
Experimental Evidence ◽  
Analytical Model ◽  
Excellent Agreement ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Refined Model ◽  
Wall Area

Cavity solar receivers are generally believed to have higher thermal efficiencies than external receivers due to reduced losses. A simple analytical model was presented by the author which indicated that the ability to heat the air inside the cavity often controls the convective loss from cavity receivers. Thus, if the receiver contains a large amount of inactive hot wall area, it can experience a large convective loss. Excellent experimental data from a variety of cavity configurations and orientations have recently become available. These data provided a means of testing and refining the analytical model. In this manuscript, a brief description of the refined model is presented. Emphasis is placed on using available experimental evidence to substantiate the hypothesized mechanisms and assumptions. Detailed comparisons are given between analytical predictions and experimental results. Excellent agreement is obtained, and the important mechanisms are more clearly delineated.

Crypto-steady supersonic pressure exchange: A simple analytical model

2008 ◽  
Vol 85 (4) ◽  
pp. 228-242 ◽  
Author(s):  
Hongfang Zhang ◽  
Charles A. Garris
Keyword(s):  
Analytical Model ◽  
Simple Analytical Model ◽  
Pressure Exchange

scholarly journals Multi-stable composite twisting structure for morphing applications

2012 ◽  
Vol 468 (2141) ◽  
pp. 1230-1251 ◽  
Author(s):  
X. Lachenal ◽  
P. M. Weaver ◽  
S. Daynes
Keyword(s):  
Analytical Model ◽  
Material Properties ◽  
Degrees Of Freedom ◽  
Design Parameters ◽  
Engineering Structures ◽  
The Past ◽  
Wide Range ◽  
Morphing Structure ◽  
Low Mass ◽  
Unstable States

Conventional shape-changing engineering structures use discrete parts articulated around a number of linkages. Each part carries the loads, and the articulations provide the degrees of freedom of the system, leading to heavy and complex mechanisms. Consequently, there has been increased interest in morphing structures over the past decade owing to their potential to combine the conflicting requirements of strength, flexibility and low mass. This article presents a novel type of morphing structure capable of large deformations, simply consisting of two pre-stressed flanges joined to introduce two stable configurations. The bistability is analysed through a simple analytical model, predicting the positions of the stable and unstable states for different design parameters and material properties. Good correlation is found between experimental results, finite-element modelling and predictions from the analytical model for one particular example. A wide range of design parameters and material properties is also analytically investigated, yielding a remarkable structure with zero stiffness along the twisting axis.

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