Design & Analysis of Non Pneumatic (air less) Tyre ...ijdcst.com/pdf/V5-I3-08.pdf · Design & Analysis of Non Pneumatic (air less) Tyre Comparing ... I considered Toyato Innova Car

IJDCST @ March-April-2017, Issue- V-5, I-3, SW-08 ISSN-2320-7884 (Online) ISSN-2321-0257 (Print)

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Design & Analysis of Non Pneumatic (air less) Tyre Comparing

with Pneumatic Tyre Ch.Uma Mahesh 1, B.Chandra Shekar2, V.Ravi Kumar3

1M.Tech Mechanical Engineering (CAD/CAM) Student, AKULA SREE RAMULU COLLEGE OF ENGINEERING, A.P., India.

2Assistant Professor, Dept. of Mechanical Engineering, AKULA SREE RAMULU COLLEGE OF ENGINEERING, A.P., India.

3Assistant professor, Dept. of Mechanical Engineering, AKULA SREE RAMULU COLLEGE OF ENGINEERING, A.P., India.

Abstract — The Non Pneumatic Tyre (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 honey comb 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. My project involves design and

analysis of an airless tire (NPT) for domestic cars; this will

be followed by comparison of stresses and deformation

between Pneumatic and non Pneumatic tires and also

performance of non Pneumatic tires for different materials

and justifying the better material among the materials

chosen, based upon stress analysis. The tire is modeled in

Pro E Wild fire 4.0 and analysis is conducted in Ansys

Workbench 15.0.

1. INTRODUCTION

In this project, I considered Toyato Innova Car as

reference and the following are the details of car which

was used for load calculation.

Length 4585 mm

Width 1760 mm

Height 1760mm

Weight 2000kg

By observing the above data, I taken weight values for

analysis purpose. In the above data, weight is shown for

total load acting on 4 wheels. So, I divided into single

wheel load i.e., 500kg . Later I converted the load 500 kg

into Force in terms of Newton’s i.e.,

Force 4905N.

Modeling Of NPT(Air Less)Tyre Using PRO-E

Fig 1 Dimensions of NPT

The design calculations of non pneumatic tyre as shown

above. By using this drawing as reference and I modeled

NPT using ProE

Fig 2 Final Model Of NPT(Air Less) Tyre

By using Slice Tool, I separate the tyre component into 3

parts are inner ring, honey comb spokes and thread.


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Fig 3 Inner Ring

The inner ring creats a connection between hub and

tyre.In this project, I maintain Aluminum alloy as a

standard material for both Pneumatic and Non-Pneumatic

tyres of Inner ring.

.

Fig 4 Honey Comb Spokes

The honey comb spokes is the middle part of inner ring

and thread and acts as a supporting

member for thread and inner ring. In this project, I varied

the materials for honey comb

spokes for determining the stresses and suggests the best

material based upon analysis results.

Fig 5 Thread

The thread is used to increase life of the tyre. In this

project, I used rubber as a standard material for both

Pneumatic and Non-Pneumatic tyres.

2. ANALYSIS OF NPT

1 Analysis of NPT Spokes With Polyethylene Material

Meshing Model of NPT


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The above figure indicates the boundary conditions of

NPT

The above figure indicates the NPT of Force 4905 in terms

of Newtons(N) and also shows the loading position clearly .

Solution

Fig.1 Equivalent Stresses (Von-Mises) of Polyethylene

Material

In the NPT analysis, the first material is taken as

Polyethylene material, by imported the components and

assigning material from engineering data, after that done

meshing and applied boundary conditions, force. For

determining stresses, Equivalent (Von-Mises) Stresses is

evaluated and the values range from minimum to

maximum i.e.,0.0096 to 20.32 in terms of ―MPa‖ as

shown clearly in above figure.

Fig.2 Total Deformation of Polyethylene Material

In the NPT analysis, the first material is taken as




determining deformation of the Non Pneumatic Tyre, Total

Deformation is evaluated and the values range from

minimum to maximum i.e., 0 to 0.0277 in terms of ―mm‖

as shown clearly in above figure.

2.Analysis Of NPT Spokes With Nylone

Material :

Fig. 3 Equivalent Stress (von Mises) of Nylone Material


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In the NPT analysis, the second material is taken as

Nylone material, by imported the components and





maximum i.e.,0.010 to 55.18 in terms of ―MPa‖ as shown

clearly in above figure.

Fig. 4 Total Deformation of Nylone Material

In the NPT analysis, the second material is taken as

Nylone material, by imported the components and





minimum to maximum i.e., 0 to 0.942 in terms of ―mm‖ as


3 Analysis Of NPT Spokes With Polycarbonate

Material

Solution

Fig.5Equivalent (Von Mises) Stress of Poly Carbonate

Material

In the NPT analysis, the third material is taken as

Polycarbonate material, by imported the components and





maximum i.e., 0.021 to 77.09 in terms of ―MPa‖ as shown

clearly in above figure.

Fig.6 Total Deformation of Poly Carbonate

Material

In the NPT analysis, the third material is taken as








4 Analysis Of NPT Spokes With Acrylic Material


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Solution

Fig. 7 Equiuvalent (Von Mises)Stress of Acrylic

Material

In the NPT analysis, the fourth material is taken as Acrylic

material, by imported the components and assigning

material from engineering data, after that done meshing

and applied boundary conditions, force. For determining

stresses, Equivalent (Von-Mises) Stresses is evaluated and

the values range from minimum to maximum i.e.,0.011 to

20.75 in terms of ―MPa‖ as shown clearly in above figure.

Fig. 8 Total Deformation of Acrylic

Material

In the NPT analysis, the fourth material is taken as Acrylic

material, by imported the components and assigning

material from engineering data, after that done meshing

and applied boundary conditions, force. For determining

deformation of the Non Pneumatic Tyre, Total




3. PROBLEM DEFINITION

Non-pneumatic tyres generally have higher rolling

resistance and provide much less suspension than similarly

shaped and sized pneumatic tyres. Other problems for air

lesstyres include dissipating the heat buildup that occurs

whenthey are driven. Therefore, itis important to minimize

the local stresses of spokes that is,the spokes should be

fatigue resistant. In this project we designed NPT based on

hexagonal honeycomb spokes. Honeycombs have been

primarily used in lightweight sandwich structures for

which a high out-of-plane stiffness is desired. A

honeycomb structure is an array of hollow cells formed

between thin vertical walls.

4. RESULTS ANALYSIS OF NPT

For Polyethylene material, equivalent stresses are

20.32 Mpa and total deformation is 0.027mm.

For Nylone material, equivalent stresses are

55.183 Mpa and total deformation is 0.942 mm.

For Polycarbonate material, equivalent stresses

are 77.09 Mpa and total deformation is 8.57mm.

For Acrylic material, equivalent stresses are


Modeling & Analysis of Pneumatic Tyre with

Polyethylene Material

Fig. 1 Pneumatic Tyre

The above image shows the Modeling of Pneumatic Tyre

using ProE Part Module. The design calculations are same

as Non Pneumatic Tyre.

Solution


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Fig.2 Equivalent (Von Mises ) Stress of Polyethylene

Material

In the Pneumatic Tyre analysis, the material is taken as

Polyethylene material because in NPT analysis,

Polyethylene material was the best among other materials.

So,based upon the results,Polyethylene material is applied

for Pneumatic Tyre.By imported the components and





maximum i.e.,0.0072 to 160.63 in terms of ―MPa‖ as


Fig.3 Total Deformation of Polyethylene Material

In the Pneumatic Tyre analysis, the material is taken as




determining deformation of the Pneumatic Tyre, Total




Result Analysis Of Pneumatic Tyre:

For Polyethylene material, equivalent stresses are


CONCLUSION & FUTURE SCOPE

Design and analysis of an airless tire (NPT)

for domestic cars is completed by using ProE and

ANSYS. We compared the deformation and stress

for both Pneumatic and airless tire, the results

obtained for airless tire are best compared to

Pneumatic tires further the stress and deformation for

different materials like Polyethylene, nylon,

polycarbonate, Acrylic are compared and best

material is chosen as Polyethylene which as low

deformation and stresses compared to other materials

chosen.

FUTURE SCOPE:

To be analyze Thermal behavior

To be analyze Vibration behavior

REFERENCES

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

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

„Finite element stress and strain analysis of a solid tire‟

Journal of Achievements in Materials and Manufacturing

Engineering Vol.31, issue 2.

[3]y. Li, university of missouri-rollaw.y. Liu, Washington

University in st. Louis s. Frimpong, university of missouri-

rolla. „Effect of ambient temperature on stress,

deformation and temperature of dump truck tire‟

[4]T. Yamanishi, K. Matsuda the ohtsu tire & rubber co.

Ltd., Osaka, Japan „Integrated tire analysis and

simulation‟

[5]Nicholas D. Smith, Colorado state university, 2004

formula SAE platform. „Understanding parameters

influencing tire modeling‟

[6]Dr. Hani Aziz ameen, (March 2008) „Mechanical

properties of composite material using natural rubber with

epoxy resin‟ Vol.26, issue 2.

[7]J.M. Krodkiewski (2008) „Mechanical vibrations‟

[8]Jani k. Ojalanokiantyre plc., R&D/tire construction

(2005) „Using abaqus in tire development process‟

[9]Anrdeamordini, Anfredstrauss, (October 2008) „An

innovative earth quick isolation system using fiber

reinforce rubber‟

[10]Olivier Le maitre and Manfred sussner,

CeserZarak ,Michelin Americas R&D Corp (1998)

„Evaluation of tire wear performance‟

[11]Alfredo RV. Airless tire. US patent, US 3, 329192;

1967.

[12]Palinkas RL, Page GJ. Non-pneumatic tire with

supporting and cushioning members. US patent, US

4832,098; 1989.

[13]Zevenhoven, R., Treatment and disposal of

polyurethane wastes: options for recovery and recycling.

2004: Helsinki University of Technology.

[14]Liu, H., J. Mead, and R. Stacer, Environmental effects

of recycled rubber in light-fill applications. Rubber

Chemistry and Technology, 2000. 73(3): p. 551-564.

[15]S. K. Jha, ―Characteristics and sources of noise and

vibration and their control in motor cars‖, J. Sound and

Vibrat. vol. 47, pp. 543–558, 1976.


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[16] PSG Design Data Book

[17] Machine Design by R.S.Kurmi

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Design & Analysis of Non Pneumatic (air less) Tyre ...ijdcst.com/pdf/V5-I3-08.pdf · Design & Analysis of Non Pneumatic (air less) Tyre Comparing ... I considered Toyato Innova Car