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Please use this identifier to cite or link to this item: http://hdl.handle.net/10651/36347

Title: Comparison of viscoelasticmModuli fitting using optimization methods
Author(s): Fernández, Pelayo
Noriega González, Álvaro
Lamela Rey, María Jesús
Fernández Canteli, Alfonso Carlos
Keywords: Viscoelasticity
Prony series
Master curves
Optimization
Issue date: 2012
Publisher: Kazan Scientific Centre of the Russian Academy of Science
Format extent: 8 p.
Abstract: Usually, viscoelastic models based on Prony’s series are used to fit the master curves from experimental results. However, the fitting process requires previous knowledge of the time-parameters of the model, τ_i, in order to fit the corresponding modulus. In general, a homogeneous distribution in logarithmic-time scale is used for τ_i, but a large number of terms in the Prony’s series are needed to achieve a suitable fitting that cannot be implemented into a commercial finite element code, in which the number of terms can be limited. As an alternative, a new optimizing methodology for fitting master curves of viscoelastic materials with Prony-based models is presented. This approach can be applied to the definition of different experimental viscoelastic master curves, such as those related to relaxation or creep. Finally, the results are compared with those obtained with the homogeneous distribution fitting method
Description: 19th European Conference on Fracture, Kazan (Rusia)
URI: http://hdl.handle.net/10651/36347
ISBN: 978-5-905576-18-8
Sponsored: The authors would like to acknowledge the financial support of the national and regional research programmes, through the BIA2008-06816, EQPT04-21 and IB09-136 projects, and of the Gijon Council by means of a research grant awarded by the IUTA
Project id.: BIA2008-06816
EQPT04-21
IB09-136
Appears in Collections:Construcción e Ingeniería de Fabricación
Ponencias, Discursos y Conferencias
Investigaciones y Documentos OpenAIRE

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