Browsing by Author "Van Blommestein, Wilbur B."
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- ItemExperimentally determined material parameters for temperature prediction of an automobile tire using finite element analysis.(Stellenbosch : Stellenbosch University, 2016-12) Van Blommestein, Wilbur B.; Venter, Gerhard; Venter, Martin P.; Stellenbosch University. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering.ENGLISH ABSTRACT: The following report documents the experimental determination and validation of a tires material parameters for use in a thermal nite element simulation procedure. Uni-axial tensile tests were performed on tire samples. The force displacement response of each was used to determine material properties by means of direct curve ts and iterative numerical procedures. Equivalent nite element simulation models were used to validate the properties. Hysteresis behaviour of the rubber regions were identi ed by dynamic mechanical analysis. Material de nitions were incorporated into existing nite element models developed by Maritz (2015) to predict the steady-state heat generation and temperature distribution within a tire due to hysteresis. The use of material properties from literature resulted in inaccurate model predictions when compared to experimental measurements. A series of validation experiments and equivalent simulations were performed in order to evaluate the resulting structural response. The updated models provided accurate predictions of structural deformation and tread contact pressure distributions under a variety of loading conditions. Experimental rolling tire temperature measurements were taken on a test bench. A comparison of the results with those obtained from the equivalent thermal models revealed remarkable similarities and improvements.