Design Of Tweel Tires And Adaption As A Replacement

Over Conventional Tires

Name: Mohammed SalmanUSN: 4PA13ME727PA college of engineering ,Mangalore

05/02/2023

CONTENTS:• PNEUMATIC TIRES• INTRODUCTION• PART OF TWEELS• DESIGN• HOW IT WORKS?• ADVANTAGES• DISADVANTAGES• DESIGN APPROACH• APPLICACATION• CONCLUSION• REFERENCE

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Pneumatic tires

• Wheel is used as potter’s wheel in 3500 BC• Later in 1847 Robert William Thomson came up with of

Pneumatic tires• In 1888 John Boyd Dunlop designed practical

Pneumatic tires• 1946 Michelin started manufacture

Tyre is a ring-shaped vehicle component that covers the wheel's rim to protect it and enable better vehicle performance. Tire which are inflated with air is called Pneumatic tires

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Drawbacks

• Puncture or Blowout.

• Variations in air pressure changes tire performance.

• Can blow out by gunfire or explosion.

• Improper inflation pressure

• Susceptible to changes in temperature

• High rolling resistance

• Impact on environment

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Fire Land fill

Virus Injury

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Tire-related Accident Statistics

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TWEELS

• It is an airless tire design• It consists of cable reinforced band of rubber

with molded tread and shear band just below it

• A series of polyurethane spokes serves as energy absorbing unit just like air in pneumatic tires

Introduction:

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Parts of tweel

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Design

• Whole Tweel structure is divided in to cell. The single cell is created first and mirrored to create entire structure.

• An elevated cell angle, θ, cause cellular structures to comprise flexibility under uni-axial loading.

• The spokes with a superior cell angle magnitude illustrate excellent fatigue resistant spoke design.

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1) Geometrical aspects:The wheel size is 25”×6.5”×15”The hub or rim diameter is = 380.1 mm.Hub thickness is = 25 mm.The outer ring diameter is = 605 mm.The outer diameter of the wheel is =625 mm.The thickness of shear band is = 15 mm.The width of the wheel is = 165.1 mm.

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How it works?• Flexible spokes are fused with a flexible wheel(deformable

section) which deforms to absorb shock• The Tweel also has a unique capability to have different

vertical and lateral stiffness• The vertical stiffness affects ride comfort, and lateral stiffness

affects handling and cornering• The sheer band surrounding the spokes effectively takes the

place of air pressure, distributing the load

MICHELIN® X® TWEEL® TURF Overview

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Advantages• Eliminates air leaks or tyre blow outs.

• Its flexibility provides an increase in

surface area of contact.

• No maintenance needed.

• To lengthen tread life.

• Makes Vehicle more Efficient

• Durability & Long Life.

• Can take gunfire or explosion.

• Less environmental impact

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Disadvantage

• Different Manufacturing process

• Vibration

• Not as economic as pneumatic tyres

• Lack of adjustability

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DESIGN APPROACH

NASA’S Apollo Lunar Rover

Michelin

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Resilient Technologies, LLC

Bridgestone

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Hankook iFLEX

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Application

• Heavy vehicle

• Military Vehicle

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• All-terrain vehicle(ATV)

• Aero space

• Regular cars

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Conclusion • Tyres may seem to be a trivial part of an automobile that cannot be

improved, but research into airless tyres shows otherwise. This new technology will increase the safety of cars as well as have a positive impact environmentally. The airless tyre or tweels can completely adapted as a replacement over conventional tires

• If the climate changes will force a sudden and dramatic change in transportation and vehicle policies, the tyre manufacturer who fails to consider unconventional solutions may suddenly find itself in an inferior position in airless tyre technology. There are possibilities to reduce noise and vibration further, in particular if the extreme high-speed demands (speeds in excess of 200 km/h) can be designed

• Tweels are most convenient to replace the conventional tyre since they provide uniform traction and wear as that of conventional tyre

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Reference• https://youtu.be/91LWdeBQxow• Umesh G , Amith Kumar S N(Design and Analysis of Non-Pneumatic Tyre (NPT)

With Honeycomb Spokes Structure) Volume 6 Issue No. 9• G. Chandra Sekhar, B. Anjaneyulu , K. Kiran Kumar Rao , G.Nagamalleswara

Rao(Design and Analysis of Four Wheeler Airless Tire) Volume 6 Issue No. 11• Rutika Gotad, Sukanya Yadav , Aarti Dung(Tweel Tyre Technology: Study Paper)

Volume 1, Special Issue , Vivruti 2015. Impact Factor: 1.036, Science Central Value: 26.54

• C. Manibaalan, Balamurugan.S, Keshore, Dr.Joshi.C.Haran(STATIC ANALYSIS OF AIRLESS TYRES) ISSN 2250-3153

• http://auto.ndtv.com/news/michelin-to-start-mass-production-of-airless-tyre-703700

• http://www.pajcic.com/are-you-riding-with-safe-tires-on-your-car/• https://en.wikipedia.org/wiki/Tweel