A Study on the Contour of the Radial Tire: Rolling Contour Optimization Theory — RCOT

Yamagishi, K.; Togashi, M.; Furuya, Shinji; Tsukahara, Kiyoshi; Yoshimura, N.

doi:10.2346/1.2148779

Cited by 18 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation (9) was also reported by RCOT (Yamagishi et al, 1987) and TCOT (Ogawa et al, 1990). The curve above does not contain the belt, so it can be called tire profile without belt.…”

Section: Equilibrium Profiles Of Radial Tiresmentioning

confidence: 99%

See 1 more Smart Citation

An improved method of using equilibrium profile to design radial tires

Wang

Cui

et al. 2015

JAMDSM

View full text Add to dashboard Cite

Tire performances are strongly influenced by cross section profile, and equilibrium profile has been a focus of radial tire researches, however, how to use the profiles to design radial tires has been reported rarely due to reasons of secrecy. This paper describes a practical method of using equilibrium profile to design radial tires, which is based on the restricted dimensions by tire standards. Based on the membrane model and minimum energy principle, equations of equilibrium profiles of radial tires with flat and curved belts are obtained by using variational approach. A method of designing carcass contours by using these equations is developed, in contrast to earlier methods the proposed method makes the width rather than the height of the point with maximum width on the profiles as the input parameter, and the restriction lengths of carcass by the belt are also calculated at the same time. For 175R14 tire, this paper's results are compared with Akasaka's, the accuracy of this method is confirmed and the effects of belt radius on profiles are revealed. Four different designs of 295R22.5 tire are analyzed by finite element method to verify the benefits of this method. This method can be used to design both tires with larger and smaller aspect ratios, and it will offer a strong guide for designing radial tires.

show abstract

“…Equation (9) was also reported by RCOT (Yamagishi et al, 1987) and TCOT (Ogawa et al, 1990). The curve above does not contain the belt, so it can be called tire profile without belt.…”

Section: Equilibrium Profiles Of Radial Tiresmentioning

confidence: 99%

“…The expression is different from RCOT (Yamagishi et al, 1987) and TCOT (Ogawa et al, 1990), there is an additional coefficient comparing with Eq. (9), which indicates that the k also effects ρ(r).…”

Section: Equilibrium Profiles Of Radial Tiresmentioning

confidence: 99%

An improved method of using equilibrium profile to design radial tires

Wang

Cui

et al. 2015

JAMDSM

View full text Add to dashboard Cite

show abstract

“…But because no uniform procedure exists in this method, the carcass contour varies according to the designer. Accordingly, only a highly skilled designer can realize a good design by applying this method [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Shape design of a tire contour based on approximation model

Lee

Kim

Kim³

et al. 2011

J Mech Sci Technol

View full text Add to dashboard Cite

The basic purpose of a tire is to enhance vehicle performances such as driving performance, rolling resistance, durability, ride comfort, noise, wear resistance, etc. by acting as a flexible cushion. To meet the demand for increased vehicle performances, the design method of a tire has advanced. This study proposes a structural design method for tire contour by considering both the tread contour and the sidewall contour, simultaneously. Existing studies of tire contour optimization have focused on the tread contour and the sidewall, separately. Durability, maneuverability and ride comfort are performances that are commonly investigated in tire contour design. Durability, maneuverability and ride comfort can be measured by the values of the strain energy density, tension and vertical stiffness, respectively. The optimization technique using a metamodel is introduced to maximize durability while satisfying the imposed constraints of tension and ride comfort. To achieve this, the responses defined in the optimization formulation are expressed mathematically in explicit form with respect to the design variables by using the kriging surrogate model, resulting in a simple optimization problem. Then, the simulated annealing algorithm is utilized to find the global optimum.

show abstract

“…Good representative design theories for a new body line are the TCOT [44][45] and CSSOT [43]. The tire design theories, which have so far developed, mainly rely on the indoor or field test to demonstrate the improved performance.…”

Section: Tire Design Theorymentioning

confidence: 99%

“…But this approach does not guarantee all performance quality at the same time. The motivation, therefore, behind a tire contour design theory [43][44][45][46] is to make a new bodyline profile, which is intentionally modified from the natural bodyline profile, in order to increase the tire durability, without sacrificing other important performance characteristics. A good representative design theory for a new bodyline is the Tension Control Optimization Theory (TCOT) [44][45][46] and Stress-Strain Cycle…”

Section: Literature Reviewmentioning

confidence: 99%

Fatigue Life Prediction for Cord-Rubber Composite Tires Using a Global-Local Finite Element Method

Han

Becker

Fahrenthold

et al. 2004

Tire Science and Technology

View full text Add to dashboard Cite

A failure analysis, based on fracture mechanics, may be useful for predicting the lifetime of a cord-reinforced rubber composite pneumatic tire. This paper presents a new three-dimensional Finite Element (FE) local model to calculate the energy release rate at the belt edge region. The new local model uses a three-dimensional (3D) Finite Element Modeling (FEM) fracture analysis based on a steady-state rolling assumption, in conjunction with a global-local technique in ABAQUS. Within the local model, a J-integral variation study is performed in the crack region. This consists of a prediction of the crack propagation direction and a mesh density analysis of the crack model. Furthermore, the study is used to determine the crack growth rate analysis. This study assumes that a flaw exists inside the tire, in the local model, due to a mechanical inhomogeneity introduced in the manufacturing of the tire. This paper also considers how different driving conditions, such as free-rolling, braking and traction, contribute to the detrimental effects of belt separation in tire failure.

show abstract

A Study on the Contour of the Radial Tire: Rolling Contour Optimization Theory — RCOT

Cited by 18 publications

References 4 publications

An improved method of using equilibrium profile to design radial tires

An improved method of using equilibrium profile to design radial tires

Shape design of a tire contour based on approximation model

Fatigue Life Prediction for Cord-Rubber Composite Tires Using a Global-Local Finite Element Method

Contact Info

Product

Resources

About