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Simulation and Investigation of Mechanical Behavior of Non Pneumutic Tires

Dana, Amir | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52183 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Arghavani Hadi, Jamal
  7. Abstract:
  8. Due to the relatively high freedom of selection of materials associated with a simple manufacturing method, a nonpneumatic tire (NPT) can be manufactured with low viscoelastic energy loss material. NPTs consisting of flexible spokes and the shear band are still at an early stage of research and development. An optimization study of NPTs’ geometry needs to be conducted, which is the objective of this thesis. Parametric studies and design of experiments (DOE) of an NPT are conducted with a hyper-viscoelastic finite element (FE) model to determine the effects of four design variables on rolling resistance, contact pressure and vertical deflection. Considering vehicle load carrying capacity and riding comfort, ranges of vertical deflection between 16 and 20 mm and contact pressure between 0.6 MPa and 0.8 MPa are selected as constrains for the optimization. A response surface model (RSM) is generated from DOE and is used to find the optimum design value for minimizing rolling resistance of an NPT under the constrains. Finite element simulations with the optimized NPT geometry are carried out for validation of the optimization. The optimized design parameters reduce rolling resistance of our initial NPT configuration by 17.7% when a vertical load of 3000 N
  9. Keywords:
  10. Contact Pressure ; Vertical Stiffness ; Rolling Resistance ; Airless Tires

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