Influence of the Production Process on Tire Rolling Characteristics

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Contributors

Abstract

During the tire production process, a green tire consisting of uncured rubber is placed inside a heating press. By applying a large inner pressure, it is formed into its final shape. Subsequently, the temperature is increased and rubber vulcanization starts, which significantly changes the material behavior. Finally, the tire is extracted from the mold and cools down, which leads to shrinkage of the reinforcement layers of the tire. During the production of the tire, it undergoes a complex deformation history, which leads to prestress in the rubber compounds and reinforcements. This process and its influence on the final tire are usually neglected in the tire design process. However, it could be shown that the production process has an influence on the final tire shape. In a previous contribution, a finite element (FE) material formulation, which reliably describes the phase change from uncured to cured rubber, has been presented. It has been formulated in combination with the micro-sphere approach. An arbitrary LAGRANGian-EULERian (ALE) formulation is applied to take into account the severe distortions, which are present during the tire production process. In the presented framework, the results of the tire production process are directly transferred to a footprint analysis and a subsequent steady state rolling investigation. In this contribution, the viscoelastic material description of cured rubber is adopted to the mixed LAGRANGian-EULERian steady state rolling approach. Therefore, the same material description is used for the analysis of the production process and the tire in service. This is a further step towards a closed numerical representation of the whole tire lifetime, which could be used as a digital twin of the tire. In this contribution, the influence of the tire production process is investigated with respect to the tire driving performance. Therefore, a numerical comparison of a rolling tire is carried out with respect to rolling resistance and its temperature increase. By neglecting the tire production process, prestress in the rubber and the geometrical change due to the in-molding step are not taken into account, which leads to a different driving behavior of the final tire.

Details

Original languageEnglish
Title of host publicationConstitutive Models for Rubber XIII
EditorsHüsnü Dal
Place of PublicationIstanbul
PublisherCRC Press
Pages183-189
Number of pages7
ISBN (electronic)9781003516880
Publication statusPublished - 2025
Peer-reviewedYes

External IDs

ORCID /0000-0002-2124-9521/work/172084661
Scopus 85217664868

Keywords

ASJC Scopus subject areas