Research Information System
13th European Conference on Constitutive Models for Rubber, ECCMR 2024, İstanbul, Turkey, 26 - 28 June 2024, pp.255-261, (Full Text)
Prediction of lifetime for rubber-like materials subjected to uniaxial and multiaxial loads is an essential requirement in design of rubber components. The current state-of-art predictions rely on a range of stretch, stress, and energy metrics; each with its own formal definition. Strain-based methodologies include maximum principal stretches, Green-Lagrange strain, and the left Cauchy-Green tensor, while stress-based techniques encompass minimum stress and maximum principal stress, Cauchy stress, and Eshelby stress using configurational mechanics. To exemplify energy-based approaches, critical plane approach of Mars, utilizing cracking energy density, has also gained prominence as an influential method in this context. Despite the extensive literature available on these methods, a comprehensive comparative study on EPDM rubber has been conspicuously lacking. This study addresses this gap by conducting a review and comparison of several fatigue predictors through a numerical case study. The comparison is based on obtained lifetime of the benchmark geometry, a two-pipe bushing under multiaxial loading conditions, directly. The outcomes of this case study are expected to provide insights for lifetime prediction of rubber components.