Analysis and application of FEM in wrap of body belt of radial tire

摘要

Research has shown that the shoulder blowing and flange cleft of tire are concerned with its structural design and process. The end inflection and wrap of body belt of heavy radial steelcord tire is compared with the original design by means of 3D FEA (TYSYS1.0), which is developed by Harbin Institute of Technology. In the model, the geometric nonlinearity due to large deformation, material nonlinearity, incom-pressibility constraint on deformation of elastomers, the anisotropy of cord-rubber composites and the nonlinear boundary conditions resulting from both tire-rim contact and tire-foundation contact are taken into account. The analysis proves that shearing stress and strain energy in shoulder and flange increase greatly due to the inflection and wrap, which will result in delamination in the two parts and decrease in lifetime. In practice, this kind of tire is very inclined to destroy by the two defects.