design and analysis of four wheeler airless tire - ijatir · design and analysis of four wheeler...

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ISSN 2348–2370

Vol.08,Issue.22,

December-2016,

Pages:4298-4305

Copyright @ 2016 IJATIR. All rights reserved.

Design and Analysis of Four Wheeler Airless Tire S. SHASHAVALI

1, C. RAGHUNATHA REDDY

2, GANESH KUMAR YADIKI

3

1PG Scholar, Dept of Mechanical Engineering, Tadipatri Engineering College, AP, India.

2Assistant Professor, Dept of Mechanical Engineering, Tadipatri Engineering College, AP, India.

3Managing Partner, Southern Geometrics, Anantapuram, AP, India.

Abstract: The airless tire is a single unit replacing the

pneumatic tire, wheel and tire assembly. It replaces all the

components of a typical radial tire and is comprised of a

rigid hub, connected to a shear band by means of flexible,

deformable polyurethane spokes and a tread band, all

functioning as a single unit. The Tweel, a kind of airless tire,

though finds its generic application in military and earth

moving applications due to its flat proof design can also

render the pneumatic tire obsolete in domestic cars. Our

project involves design and analysis of an airless tire for

domestic cars; this will be followed by a stress analysis

study. The model will be do in Pro E and analysis will do in

Ansys.

Keywords: Tire Parameters, Pro/E and Ansys.

I. INTRODUCTION

The Tweel (a portmanteau of tire and wheel) is an

airless tire design concept developed by the French tire

company Michelin. Its significant advantage over pneumatic

tires is that the Tweel does not use a bladder full

of compressed air, and therefore it cannot burst, leak

pressure, or become flat. Instead, the Tweel assembly's inner

hub connects to flexible polyurethane spokes which are used

to support an outer rim and these engineered compliant

components assume the shock-absorbing role provided by

the compressed air in a traditional tire. Sometimes, we get so

used to a certain product that no true changes are ever really

made for years, decades even. So begins an article discussing

the development of airless tires, something that has become

more prevalent in the past few years. A few tire companies

have started experimenting with designs for non pneumatic

tires including Michelin and Bridgestone, but neither design

has made it to mass production. Creating a new non

pneumatic design for tires has more positive implications

than one might think. For one thing, there are huge safety

benefits. Having an airless tire means there is no possibility

of a blowout, which, in turn, means the number of highway

accidents will but cut significantly. Even for situations such

as Humvees in the military, utilizing non pneumatic tires has

a great positive impact on safety. Tires are the weak point in

military vehicles and are often targeted with explosives. If

these vehicles used airless tires, this would no longer be a

concern. There is also an environmental benefit to using this

type of tire. Since they never go flat and can be retreaded,

airless tires will not have to be thrown away and replaced

nearly as often as pneumatic tires. This will cut down landfill

mass significantly. Because of the benefits, I believe that it is

extremely important that research and production of airless

tires is continued and increased. This type of innovation

works well in conjunction with several engineering codes of

ethics, and thus should be embraced by engineers

everywhere. Cars are things that people use every day, so

any improvements over existing designs would affect the

lives of the majority of people. Learning about such a topic,

therefore, I believe holds extreme value especially for us

freshmen engineering students. In doing research into these

kinds of topics that hold significant meaning, I can see that

what we will do can make a difference.

II. LITERATURE SURVEY Sadok Sassi, Mohamed Ebrahemi, Musab Al Mozien and

Yousef El Hadary [1], modern pneumatic tires (PT) are the

results of enormous progress in science, technology, and

manufacturing process. However, they are still subjected to

adverse problems that could compromise the road safety and

lead to accidents of different severities. Vinay T V,

Kuriakose J Marattukalam, Sachu Zachariah Varghese,

Shibin Samuel, Sooraj Sreekumar [2], a pneumatic tyre is

made of an airtight inner core filled with pressurized air.

Pneumatic tyres have been dominant in the world market due

to many advantages like low mass design, low vertical

stiffness and low contact pressure. Rutika Gotad, Sukanya

Yadav , Aarti Dung [3], the paper introduces the new

advanced developing tire technology which is used mainly in

automobile industry. As we come across different types of

accidents in our day to day life so in order to avoid such

accidents, we had developed new technology as tweel tyre.

Raymond R. Ma, Joseph T. Belter, Aaron M. Dollar [4], this

paper describes a novel fabrication technique called hybrid

deposition manufacturing (HDM), which combines additive

manufacturing (AM) processes such as fused deposition

manufacturing (FDM) with material deposition and

embedded components to produce multi material parts and

systems for robotics, mechatronics, and articulated

mechanism applications. Rathindra Nath Biswas, Mohit

Ojha and Arijeet Bhadra [5], a lot of new challenges are

being posed in front of the automobile industry by the

growing customer demands. Tire puncture is a common

problem in Automotive Vehicles. We are thinking of a tire

https://en.wikipedia.org/wiki/Portmanteau

https://en.wikipedia.org/wiki/Tire

https://en.wikipedia.org/wiki/France

https://en.wikipedia.org/wiki/Michelin

https://en.wikipedia.org/wiki/Compressed_air

https://en.wikipedia.org/wiki/Polyurethane

https://en.wikipedia.org/wiki/Spoke

S. SHASHAVALI, C. RAGHUNATHA REDDY, GANESH KUMAR YADIKI

International Journal of Advanced Technology and Innovative Research

Volume. 08, IssueNo.22, December-2016, Pages: 4298-4305

which is airless. It is made up of a combination of different

types of rubber. K.Periasamya, S.Vijayan [6], In this work,

models of air-less tire is constructs to simulate the loading

condition. The driver mind-stress may reduce by using air-

less tire in automobile field by avoiding air related problems

in the tire. Mean while uniform traction and wear as possible

to use air-less tire. Air-less tire, air-tire are modeled by

SOLID-WORKS modeling software. John Gordon, BS,

James J. Kaualarich, PhD, and John G. Thacker, PhD [13], the

performance characteristics of four 24 inch wheelchair tires

are considered; one pneumatic and three airless. Specifically,

two new airless polyurethane foam tires (circular and tapered

cross-section) were compared to both a molded poly

isoprene tire and a rubber pneumatic tire.

III. MATERIALS

A. Introduction

A composite material is usually made up of at least two

materials out of which one is the binding material, also

called matrix and the other is the reinforcement material. By

definition, composite materials consist of two or more

constituents with physically separable phases. Composites

are materials that comprise strong load carrying material

(known as reinforcement) imbedded in weaker material

(known as matrix). Reinforcement provides strength and

rigidity, helping to support structural load. The matrix or

binder maintains the position and orientation of the

reinforcement. Significantly, constituents of the composites

retain their individual, physical and chemical properties yet

together they produce a combination of qualities which

individual constituents would be incapable of producing

alone. The reinforcement may be platelets, particles or fibers

and are usually added to improve mechanical properties such

as stiffness, strength and toughness of the matrix material.

B. Overview of Composite Materials

Composites are made up of individual materials referred

to as constituent materials. There are two main categories of

constituent materials: matrix and reinforcement. At least one

portion of each type is required. The matrix material

surrounds and supports the reinforcement materials by

maintaining their relative positions. The reinforcements

impart their special mechanical and physical properties to

enhance the matrix properties. A synergism produces

material properties unavailable from the individual

constituent materials, while the wide variety of matrix and

strengthening materials allows the designer of the product or

structure to choose an optimum combination. Engineered

composite materials must be formed to shape. The matrix

material can be introduced to the reinforcement before or

after the reinforcement material is placed into the

mould cavity or onto the mould surface. The matrix material

experiences a melding event, after which the part shape is

essentially set. Depending upon the nature of the matrix

material, this melding event can occur in various ways such

as chemical polymerization or solidification from the melted

state. A variety of molding methods can be used according to

the end-item design requirements. The principal factors

impacting the methodology are the natures of the chosen

matrix and reinforcement materials.

C. Polyethylene

This Polyolefin is readily formed by polymerizing

propylene with suitable catalysts, generally aluminum alkyl

and titanium tetrachloride. Polypropylene properties vary

according to molecular weight, method of production, and

the copolymers involved. Generally polypropylene has

demonstrated certain advantages in improved strength,

stiffness and higher temperature capability over

polyethylene. Polypropylene has been very successfully

applied to the forming of fibers due to its good specific

strength which is why it is the single largest use of

polyethylene. Polyethylene also happens to be one of

lightest plastics available with a density of 0.905 g/cm2.

1. Advantages

Homo polymer

Process ability, Good

Food Contact Acceptable

Stiffness, Good

Impact Resistance, Good

Copolymer

Flow, High

Impact Resistance, High

Chemically Coupled

2. Disadvantages and Limitations

Degraded by UV

Flammable, but retarded grades available

Attacked by chlorinated solvents and aromatics

Difficult to bond

Several metals accelerate oxidative degrading

Low temperature impact strength is poor

3. Typical Applications

Automotive Applications

Household Goods

Film

Containers

Appliances

Packaging

Electrical/Electronic Applications

Industrial Applications

General Purpose

TABLE I

IV. INTRODUCTION TO DESIGN

A. Computer Aided Design (CAD)

Computer Aided Design (CAD) is the use of wide range

of computer based tools that assist engineering, architects

http://en.wikipedia.org/wiki/Polymerization

Design and Analysis of Four Wheeler Airless Tire



and other design professionals in their design activities. It is

the main geometry authoring tool within the product life

cycle management process and involves both software and

sometimes special purpose hardware. Current packages

range from 2D vector based drafting systems to 3D

parametric surface and solid design models.

B. Introduction

CAD is used to design and develop products, which can

be goods used by end consumers or intermediate goods used

in other products. CAD is also extensively used in the design

of tools and machinery used in the manufacturer of

components. CAD is also used in the drafting and design of

all types of buildings, from small residential types (house) to

the largest commercial and industrial types. CAD is used

thought the engineering process from the conceptual design

and layout, through detailed engineering and analysis of

components to definition of manufacturing methods.

AutoCAD is commercial software for 2D and 3D computer-

aided design (CAD) and drafting available since 1982 as a

desk top application and since 2010 as a mobile web and

cloud based app marketed as AutoCAD 360. Developed and

marketed by Autodesk, Inc., AutoCAD was first released in

December 1982, running on micro computers with internal

graphics controllers. Prior to the introduction of AutoCAD,

most commercial CAD programs ran on main frame

computers or mini computers, with each CAD operator

(user) working at a separate graphics terminal. AutoCAD is

used across a wide range of industries, by architects, project

managers, engineers, designers, and other professionals. It is

supported by 750 training centers worldwide as of 1994.

C. Introduction to PRO-E

Fig.1. Outer Rubber Portion (Tire).

PRO-E is the industry‟s de facto standard 3D mechanical

design suit. It is the world‟s leading CAD/CAM /CAE

software, gives a broad range of integrated solutions to cover

all aspects of product design and manufacturing. Much of its

success can be attributed to its technology which spurs its

customer‟s to more quickly and consistently innovate a new

robust, parametric, feature based model. Because that PRO-E

is unmatched in this field, in all processes, in all countries, in

all kind of companies along the supply chains. PRO-E is also

the perfect solution for the manufacturing enterprise, with

associative applications, robust responsiveness and web

connectivity that make it the ideal flexible engineering

solution to accelerate innovations. PRO-E provides easy to

use solution tailored to the needs of small medium sized

enterprises as well as large industrial corporations in all

industries, consumer goods, fabrications and assembly.

Electrical and electronics goods, automotive, aerospace,

shipbuilding and plant design. It is user friendly solid and

surface modeling can be done easily.

Fig.2. Detail View of Outer Rubber Portion (Tire)

V. FINITE ELEMENT METHOD / ANALYSIS

(FEM/A)

A. Introduction

The finite element method is numerical analysis technique

for obtaining approximate solutions to a wide variety of

engineering problems. Because of its diversity and flexibility

as an analysis tool, it is receiving much attention in almost

every industry. In more and more engineering situations

today, we find that it is necessary to obtain approximate

solutions to problem rather than exact closed form solution.

It is not possible to obtain analytical mathematical solutions

for many engineering problems. The finite element method

has become a powerful tool for the numerical solutions of a

wide range of engineering problems. It has been developed

simultaneously with the increasing use of the high- speed

electronic digital computers and with the growing emphasis

on numerical methods for engineering analysis. This method

started as a generalization of the structural idea to some

problems of elastic continuum problem, started in terms of

different equations. The basic idea in the Finite Element is to

find the solution of complicated problem with relatively easy

way. The Finite Element Method has been a powerful tool

for the numerical solution of a wide range of engineering

problems. Applications range from deformation and stress

analysis of automotive, aircraft, building, defense, and

missile and bridge structures to the field of analysis of

dynamics, stability, fracture mechanics, heat flux, fluid flow,

magnetic flux, seepage and other flow problems. With the

advances in computer technology and CAD systems,

complex problems can be modeled with relative ease.




Several alternate configurations can be tried out on a

computer before the first prototype is built. The basics in

engineering field are must to idealize the given structure for

the required behavior. The proven knowledge in the typical

problem area, modeling techniques, data transfer and

integration, computational aspects of the Finite Element

Method is essential. In the Finite Element Method the

solution region is considered as built up many small,

interconnected sub regions called finite elements. Most often

it is not possible to ascertain the behavior of complex

continuous systems without some sort of approximations.

For simple members like uniform beams, plates etc.,

classical solutions like machine tool frames, pressure

vessels, automobile bodies, ships, air craft structures, domes

etc., need some approximate treatment to arrive at their

behavior, be it static deformation, dynamic properties or heat

conducting property. Indeed these are continuous systems

with their mass and elasticity being continuously distributed.

To overcome this, engineers and mathematicians have from

time to time proposed complex structure is defined using a

finite number of well defined components. Such systems are

then regarded as discrete systems. The discretization method

could be finite difference approximation, various residual

procedures etc.

B. Importing the Model

In this step the PRO/E model is to be imported into

ANSYS workbench as follows, In utility menu file option

and selecting import external geometry and open file and

click on generate. To enter into simulation module click on

project tab and click on new simulation.

Fig.3. Imported from Pro-E

1. Defining Material Properties

To define material properties for the analysis, following

steps are used. The main menu is chosen select model and

click on corresponding bodies in tree and then create new

material enter the values again select simulation tab and

select material.

2. Defining Element Type

To define type of element for the analysis, these steps

are to be followed, Chose the main menu select type of

contacts and then click on mesh-right click-insert method

Method - Tetrahedrons

Algorithm - Patch Conforming

Element Mid side Nodes – Kept

3. Meshing the Model To perform the meshing of the model these steps are to be

followed, Chose the main menu click on mesh- right click-

insert sizing and then select geometry enter element size and

click on edge behavior curvy proximity refinement

Fig.4. Meshing

4. Fixed Supports

Fig.5. Fixed Supports

5. Acceleration Application

Fig.6. Acceleration Application




6. Force Application

Fig.7. Force Application

7. Rotational Velocity

Fig.8. Rotational Velocity

8. Static Structural Analysis of Nylon 4-6

Fig.9. Total Deformation of Nylon 4-6

Fig.10. Equivalent Stress of Nylon 4-6

9. Modal Analysis of Nylon 4-6

Fig.11. Total Deformation at Mode-1 of Nylon 4-6








Fig.16. Total Deformation at Mode-6 of Nylon 4-6.

10. Thermal Analysis of Nylon 4-6

Fig.17. Out Put Tempereture of Nylon 4-6

Fig.18. Total Heat Flux of Nylon 4-6




VI. RESULTS & DISCUSSION

The results from analysis can be replaced the air tire by

Air-less tire. Air eliminated in the tire that provides good

traction, cushion effect. The air less tire is analyzed by the

FEA with two materials like Nitrile Rubber and Nylon 4-6.

Analysis parameters of Air-less-tire are

TABLE II

From the above table II concluded that, the material Nylon

4-6 is preferable one, by comparing to Nitrile Rubber. From

static structural, modal and thermal analysis, the material

Nylon 4-6 is preferable one, because the material Nylon 4-6

is got less deformation as 0.03509 mm and stress 66.678

MPa from static structural analysis and less heat flux as

123.46 W/mm2 and high temperature 440

0C and less

deformation at high frequency and high temperature with

less heat flux by comparing to Nitrile rubber.

Heat flux or thermal flux is the rate of heat energy transfer

through a given surface per unit time. The SI derived unit

of heat rate is joule per second, or watt. Heat flux density is

the heat rate per unit area.

VII. CONCLUSION

Design and development of air-less tire eliminates air in

the tire. Air-less tire can provide uniform traction and

uniform wear while absence of air. The 4 side honey comb

design satisfies the main functions of the tire. Air-less tire

has two components that are outer band and flexible inner

band. In the air-less tire design manufacturing point of view,

material saving is obtained by replacing outer band only

after tread wear. The flexible inner band repeated use

obtained green engineering and also reduce the

environmental pollution. The driver mind-stress may reduce

by using air-less tire in automobile by avoiding air related

problems in the tire. In this thesis Nitrile rubber and Nylon

4-6 materials are used, among these two materials Nylon 4-6

is preferable. From static structural, modal and thermal

analysis, I concluded that, the material Nylon 4-6 is

preferable one, because the material Nylon 4-6 is got less

deformation as 0.03509 mm and stress 66.678 MPa from

static structural analysis and less heat flux as 123.46 W/mm2

and high temperature 440 0C and less deformation at high

frequency and high temperature with less heat flux by

comparing to Nitrile rubber.

VIII. FUTURE WORK

Future work in this direction will analyze other materials

selections and to be analyze vibration behaviour and can be

design modifications.

IX. REFERENCES

[1]Barum (2011-2012) Technical data book of Car tires.

[2]U. Suripa a, a. Chaikittiratana b, (December 2008) „Finite

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