airless tyre

1. “ANALYSIS OF AIRLESS TYRE WITH
DIFFERENT MATERIAL”
PRESENTED BY
SAMRAT PATIL
CAYMET’s
Siddhant College of Engineering,
Sudumbre, Pune - 412109
[2022-2023]

2. CONTENTS
 INTRODUCTION
 FUNCTIONS OF TYRE & PROPERTIES OF TYRE
 PNEUMATIC TYRE & IT’S DRAWBACKS
 AIRLESS TYRE & IT’S ADVANTAGES
 HOW IT WORKS
 MATERIALS
 DIFFERERENT DESIGN APPROACHES
 APPLICATIONS
 SOME DISADVANTAGES
 FUTURE OF AIRLESS TYRES

3. INTRODUCTION
• A tyre (or tire) is a circular and ring-like part of a vehicle
that comes in contact with the ground
• Tyre is a rubber member which gives the cushion to the
automobile. It consists of outer cover i.e. tyre proper and
tube inside.
• The tyre-tube assembly is mounted over the wheel rim
and air inside the tube carries entire load and provides
cushion.

4. FUNCTIONS OF TYRE & PROPERTIES OF TYRE
 FUNCTIONS OF TYRE -
• To support the vehicle load.
• To provide cushion against the shocks.
• To transmit driving and braking forces to the road.
• To provide cornering power for smooth steering.
 PROPERTIES OF TYRE -
• Non-skidding
• Uniform wear
• Load-carrying
• Cushioning
• Power consumption
• Tyre noise
• Balancing

5. PNEUMATIC TYRE & IT’S DRAWBACKS
 PENUMATIC TYRE -
• A pneumatic, or air-filled, tyre is made of an air tight inner core filled with
pressurized air.
• The pressure of the air inside the tyre is greater than atmospheric air
pressure.
• Cushioning Effect
 DRAWBACKS -
• Puncture or Blowout.
• A blowout at high speeds can lead to a dangerous car accident.
• Variations in air pressure changes tire performance.
• Can blow out by gunfire or explosion.

6. AIRLESS TYRE & IT’S ADVANTAGES
 AIRLESS TYRE - Airless TIREs or Non-pneumatic TIREs (NPT) ,
are TIREs that are not supported by air pressure.

8.  ADVANTAGES –
• Eliminates air leaks or TYRE blow outs.
• No maintenance required.
• Facilitate recycling.
• Remains mobile even with some of the spokes are
damaged or missing.
• Durability & Long Life.
• Can take gunfire or explosion.
• Less environmental impact.

9. HOW IT WORKS
• The flexible tread and shear bands deform temporarily
as the spokes bend, then quickly go back to the initial
shape.

10. Deformation of tyre when it get through the obstacle

11. Below you will find some of the rubber, chemical and
structural materials used to make tyres.
 RUBBERS
• NATURAL RUBBER
Most natural rubber comes from para rubber trees. The
properties of natural rubber include durability and abrasion
resistance.
• SYNTHETIC RUBBER
Synthetic rubber, which is a petroleum-based product,
has heat-resisting properties.
MATERIALS

12.  CHEMICALS MIXED WITH RUBBER
• CARBON BLACK
Carbon black increases the strength of rubber.
• SILICA
The white powder of silicon dioxide delivers better fuel
efficiency and wet grip.
• OIL
Oil softens rubber.

13. • ANTIOXIDANT
Antioxidant inhibits oxidation of rubber.
• SULFUR
sulfur gives rubber greater elasticity.
• VULCANIZATION ACCELERATOR
Vulcanization accelerator helps build cross-links between
rubber and sulfur.

14.  CONSTRUCTION MATERIALS
• Polyester
Polyester is used as a material of body ply in passenger
tires.
• Rayon
Rayon is used as a material of body ply in passenger
tires.
• Steel
Steel is used as a material of beads and steel belts in
passenger tires.

15. DIFFERERENT DESIGN APPROACHES

17. APPLICATIONS
• They are used in some small vehicles such as riding lawn
mowers and motorized golf carts.
• They are also used on heavy equipment such as
backhoes, which are required to operate on sites such
as building demolition.
• Military Usage Tweel deflects mine blasts away from the
vehicle better than standard tyres and that the Tweel
remains mobile even with some of the spokes damaged
or missing.
• The airless tyres are also used in All-terrain vehicle (ATV)
made by Polaris.

18. SOME DISADVANTAGES
• Lack of adjustability
• Not as economic as gas tyres
• Vibration
• Totally different producing method

19. FUTURE OF AIRLESS TYRES
• Aim to keep losses to minimum
• 95% manufacturing is recyclable
FUTURISTIC DESIGN

20. THANK YOU