| SRelationship between Flatness Ratios and Ground Contact Characteristics of Radial Tire |
| Received:November 05, 2020 Revised:November 05, 2020 |
| DOI：10.12136/j.issn.1000-890X.2021.12.0895 |
| Key Words: radial tire；flatness ratio；ground contact characteristic；normal contact stress；vertical load； inflation pressure；finite element analysis |
| Author Name | Affiliation | E-mail | | QIAO Fengliang | Harbin Institute of Technology（Weihai） | qiao_feng_liang@163.com | | KANG Yuxia | Guangxi Yuchai Machinery Co.，Ltd | | | SHEN Zhaojie* | Harbin Institute of Technology（Weihai） | shenzj@hitwh.edu.cn |
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| Abstract: |
| Taking the 205/55 R16 radial tires as the research object，the finite element models of the
tires with flatness rates of 45%，50%，55%，60% and 65% were established respectively，by adjustment of the
width of the tire cross section. The static ground contact characteristics（footprint and normal contact stress）
of the tires with 5 kinds of flatness ratios under different vertical loads and inflation pressures were analyzed
by using Abaqus software. The simulation results showed that as the flatness ratio increased，the width of
the footprint along the tire axis decreased，and the length of the footprint along the tire rolling direction was
the largest when the flatness ratio was 60% or 65%. The flatness ratios had a great influence on the footprint
areas of the tires. The larger the flatness ratio was，the more uneven the normal contact stress distribution
of tire was，and the more obvious the warpage phenomenon was. For the tires with the same flatness ratio，
the greater the vertical load was，the greater the normal contact stress at the shoulder was，and the greater the
inflation pressure was，the greater the normal contact stress in the middle of the tread was. |
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