Tire casings and their material characteristics for computational modelling of tires
2017
Krmela, J., Alexander Dubček Univ. in Trenčín (Slovak Republic) | Krmelova, V., Alexander Dubček Univ. in Trenčín (Slovak Republic)
The report is focused on determination of the material parameters from experimental data, which will be used as input data to computational modelling of radial tires for passenger vehicles. It is necessary to have knowledge about the geometry, material parameters, cross-section and structure of tire casing (number of layers of the belt and carcass, information about the bead and cap ply) for creation of computational models of tire casing for stress-strain analysis of a tire under vertical load, modal analysis etc. The tire casing parts in computational models are partially replaced with material and geometrical parameters with specified stiffness. The Finite Element Method using the program system ANSYS is applied to the computational modelling. The experiments of total tires are needed for verification analyses between computational results and experimental data. The experiments of parts of the tire casing such as parts of tread and next rubber parts of tire are needed for determination of the parameters of constitutive models of rubber elasticity such as the parameters of hyperelastic Mooney-Rivlin model. The report describes the result for two tires 165/65 R13 and 215/40 R17 as samples. The structures of the tire-crown with geometrical and material parameters are presented. The authors used orthotropic material parameters for determination of the structure parts of tire as the steel-cord belt. The values of modules of elasticity and Poisson ratios are presented for 165/65 R13. The orthotropic material parameters for definition of the tire-crown of 215/40 R17 are determined as input data to the computational model of tire.
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