To perform a tire fracture mechanics analysis, an explicit crack should be included in a tire model. The initial crack is assumed to be located in the critical region identified, and to orient in a predetermined direction. The crack is assumed to be of the shape of a closed ribbon with the size (in a tire cross section) of a certain characteristic length determined from geometrical features of the critical region. This assumption is realistic unless tire noninfirmities are of concern. A three-dimensional fracture mechanics model is formulated to study fatigue crack growth and durability in tires. Using this model, a comprehensive study of the fracture mechanics analysis of a RMT (radial medium truck) tire with a belt edge crack is conducted. Only straight rolling tire subject to vertical load are considered. The fracture mode can be determined from the calculation of the energy release rate which be decomposed into components in three orthogonal directions per the VCCT (virtual crack closure) technique. The application of this model in a radial medium truck tire reveals fracture characteristics of belt edge cracks and helps to explain mechanical and material changes in the tire subject to indoor accelerated durability tests. Along with a proprietary fatigue crack growth law, a fracture mechanics based durability analysis methodology is developed and successfully applied to rank durability of tires with different constructions or different rubber materials. It should be noted, however, that a full tire cross-section model has to be utilized if a more complex load is applied on the tire, e.g., vertical and lateral load.


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    Titel :

    Computational fracture mechanics analysis of truck tire durability


    Weitere Titelangaben:

    Bruchmechanische Analyse der Lebensdauer eines Lkw-Reifens


    Beteiligte:


    Erscheinungsdatum :

    2006


    Format / Umfang :

    8 Seiten, 13 Bilder, 1 Tabelle, 15 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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