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Direct conversion of creep data to dynamic moduli

Title
Direct conversion of creep data to dynamic moduli
Author(s)
Kwon, Mi KyungLee, Sang HunLee, Se GeunCho, Kwang Soo
DGIST Authors
Kwon, Mi KyungLee, Se Geun
Issued Date
2016-11
Type
Article
Article Type
Article
Keywords
A-StableAluminumApproximate FunctionCreepCreep ComplianceCreep DataData HandlingDirect ConversionDynamic MeasurementDynamic ModuliExperimental ErrorsINTERCONVERSIONLaplace TransformsNUMERICAL DIFFERENTIATIONPolymersRegularizationRELAXATION
ISSN
0148-6055
Abstract
The conversion of creep compliance to dynamic moduli is one of the promising ways to overcome the limitation of the dynamic measurements for wide range of frequency. Remarkable algorithms were developed by Evans et al. [Phys. Rev. E 80, 012501 (2009)] and Kim et al. [J. Rheol. 59, 237-252 (2015)]. Although the former is independent of any model of creep compliance, it suffers from the instability for experimental error. On the other hand, although the latter is a stable algorithm based on the model of Havriliak and Negami [Polymer 8, 161-210 (1967)], it has a problem of parameter identification. This paper is an effort to improve the approach of Kim et al. [J. Rheol. 59, 237-252 (2015)] by suggesting new approximate functions for the Laplace transform of creep compliance. We compared our algorithm with the two previous ones. © 2016 The Society of Rheology.
URI
http://hdl.handle.net/20.500.11750/2162
DOI
10.1122/1.4961484
Publisher
Society of Rheology
Related Researcher
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Division of Biotechnology 1. Journal Articles

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