Non-Pneumatic Tyres

Seminar on Non-Pneumatic Tyres

1. (Mechanical Engineering) 13-Dec-19 1 Seminar on NON-PNEUMATIC TYRES Presented by - Guided by - Panchvishe Shyam Siddeshwar Prof.S amal Luna (T150600851) DEPARTMENT OF MECHANICAL ENGINE ERING DHOLE PATIL COLLEGE OF ENGINEERING,PUNE

2. CONTENTS Introduction Motivation History How It Works? Bridgestone Vs micheline Advantages Future Scope References

3. NON PNEUMATIC TYRES 3

4. INTRODUCTION NPT are the tyres that are not supported by air pressure. Since the earlier invention of a non-pneumatic wheel in 1920’s, the non-pneumatic tire (NPT) is getting more attention due to its advantages over the pneumatic counterpart. Many design studies are still needed from the viewpoint of material, pattern, and structures. However, no systematic research for such important design issues has been reported in the literature up to now. 4

5. MOTIVATION It can save money as there is no puncture problem. It never goes flat so no need of extra tyre. 5

6. HISTORY Initially a craftsman known as wheelright forged bands of irons &steel and place on wooden wheels of carts &wagons. In 2005 Michelin a tyre company made an Airless tyre called TWEEL(combination of tyre & wheel) At Tokyo motor show 2013 Bridgestone Corporation announced that they developed Airless(Non-pneumatic) Tyres . 6

7. STRUCTURE & WORKING Structure of spokes stretching along the inner sides of the tires supporting the weight of the vehicle. A synthetic resin that becomes flexible when heated, can be processed into a variety of shapes, and becomes hard when cooled. The changes from heating and cooling can generally be repeated, making it easy to both mold and recycle the material.

8. Flexing of spokes 9

9. ADVANTAGES The tires require less maintenance The worry of punctures is eliminated. The materials used in the tires and the spoke structure are 100% recyclable.  Provides low rolling resistance and contributing to reductions in co2 emissions. Nothing to do with fuel efficiency in a direct way, only offering the benefit that it will never influence consumption. 10

10. INCREASED VERSATILITY Using high-strength but flexible high-performance resin as a material has increased versatility through improved load-bearing capabilities and driving performance. High-speed travel (maximum 60 km/h) in ultralight vehicles has also become possible. 11

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12. BRIDGESTONE VS MICHELIN Bridgestone’s prototype version looks very similar to that of Michelin. In Michelin’s design the thermoplastic fins are staggered so that the connections to the hub and the rim won’t torque causing complete structural breakdown. 13

13. 14 The biggest difference between the two tire maker’s wheels, as pictured above, is the size of the supporting ribs.

14. 15 Michelin focused on allowing the tires to be able to deform over obstacles, making them more suitable for military applications where as Bridgestone has approached its tire from the consumer angle, creating a highly recyclable tire that will cut down on maintenance costs and time.

15. FUTURE SCOPE Goodyear in collaboration with NASA Glenn Research Center (GRC), develop non-pneumatic tyres for use first on the moon, and eventually on Mars. 16

16. “The basic rubber-pneumatic design used on Earth does not have the same utility on the moon,” said NASA Principal Investigator Vivake Asnani . There are no lunar roads. Lunar tyres need to be designed to develop traction on sandy undulated terrain, in regions that humans have never even seen up close. 17

17. The  Spring Tire  has now been recognized with a so-called “Oscar of Innovation” at the 44th Annual  R&D 100 Awards  in Orlando, Florida. 18

18. REFERENCES www.google.com http://www.bridgestone.co.in/ http://www.newindianexpress.com/business/news/article284682.ece http://gizmodo.com/tag/tires http://www.toxel.com/tech/2009/07/05/innovative-airless-tires-by-michelin/.

19. Questions ? 20

20. THANK YOU