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RRJOMS | Volume 5 | Issue 4 | July, 2017
July 27-29, 2017 Vancouver, Canada
10
th
International Conference on
Emerging Materials and Nanotechnology
Tire rubber material characterization for effective structural and fatigue modeling and analysis
Samuel Frimpong, Wedam Nyaaba
and
Bruno Kansake
Missouri University of Science and Technology, USA
R
ubber, in its natural state, has the consistency of a heavy viscous fluid with little to no use in structural applications. However,
when vulcanized with sulfur, particulate fillers, silica and other strength inducing ingredients, cross-links are formed and the
highly amorphous state of the rubber is transformed into an elastic solid. Thus, vulcanized rubber, in the absence of cords, is a
nanocomposite. While added fillers give rubber enhanced performance characteristics (stiffness and toughness properties), their
presence influence the dynamic and damping behavior of rubber in a very complex and disproportionate fashion. Numerical
modeling of rubber behavior for predictive analysis remains a formidable challenge amidst successes achieved thus far. The object
of this paper is to implement existing rubber material constitutive models in characterizing tensile strength and fatigue test data
of rubber specimens extracted from an off-road mining truck tire. Specifically, the paper highlights modeling strategies for rubber
strain softening, nonlinear viscoelasticity, strain-induced crystallization, and fatigue crack growth rate using spreadsheets, and
commercially available material calibration codes. The novelty of the study lies in the calibration approach adopted for the fatigue
characterization of the experimental data. An example problem to show how the characterized materials are used in a finite element
analysis of a model tire is provided. The results obtained indicate enhanced durability in strain-crystallizing elastomers.
Biography
Samuel Frimpong has obtained his PhD in 1992 from University of Alberta and MS in 1988 from University of Zambia. He has obtained his Post-graduate Diploma
in 1986 and BS in 1985 from KN University of Science and Tech. of Ghana. He guided over 30 PhD and MS graduates, published 1 book, 3 book chapters, over
200 refereed journal and conference papers and given over 200 presentations. He is a Member of the APLU Board on Natural Resources, Vice Chair of the Minerals
and Energy Resources Division of NASULGC, and a Member of the College of Reviewers for Canada Foundation for Innovation and Canada Research Chairs
Program and ASCE-UNESCO Scientific Committee on Emerging Energy Technologies (ASCE-UNESCO SCEET). He served 5 years as a Member of CDC-NIOSH
Research Advisory Board, 4 years as Co-chair of ASCE-UNESCO SCEET and 2 years on Japan’s Global Warming Research Consortium. He is currently the
Editor-In-Chief of the
Journal of Powder Metallurgy and Mining
and Editorial Board Member for the
International Journal of Mining
,
Reclamation and Environment
.
He is a Registered Professional Engineer and a member of the Canadian Institute of Mining, Metallurgy and Petroleum, American Society for Mining, Metallurgy
and Exploration, American Society of Civil Engineers, and the Society for Modeling and Simulation International.
frimpong@mst.eduSamuel Frimpong et al., Res. Rev. J Mat. Sci. 2017
DOI: 10.4172/2321-6212-C1-002