  Non-pneumatic tire has been widely used due to their advantages of no
run-flat, no need of air maintenance, low rolling resistance, and improvement
of passengers comfort due to its better shock absorption. It has variety of
application in the military vehicle, earthmovers, lunar rover, stair climbing
vehicles etc. Recently UPTIS (Unique Puncture-Proof Tire System) non pneumatic
tire has been introduced for passenger vehicles. In this study three different
design configuration Tweel, Honeycomb and newly developed UPTIS have been
compared. Effect of Polyurethane (PU) material nonlinearity have also been
introduced by applying 5 different nonlinear PU material property in the
spokes. The combined analysis of the PU material nonlinearity and spoke design
configuration on the overall tire stiffness and spoke damage prediction is
analysed using 3-Dimensional FEM simulations performed in ANSYS 16.0. It has
been observed that Mooney Rivlin 5-parameter model is best to capture all 5
studied PU materials the nonlinearity. Effect of material nonlinearity on
various spoke designs have been studied. The best combination of spoke design
and the use of nonlinear material have been suggested in terms of riding
comfort, tire stiffness and durability performance.
