Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element

Quasi‐static and dynamical tests are employed to measure the modulus or the compliance of a material as a function of time or frequency, and to determine the respective distribution function in the case of a linear viscoelastic medium. The evolution of the mechanical properties, and consequently the...

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Autor principal: Hermida, É.B.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03701972_v178_n2_p311_Hermida
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03701972_v178_n2_p311_Hermida
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spelling todo:paper_03701972_v178_n2_p311_Hermida2023-10-03T15:28:32Z Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element Hermida, É.B. Quasi‐static and dynamical tests are employed to measure the modulus or the compliance of a material as a function of time or frequency, and to determine the respective distribution function in the case of a linear viscoelastic medium. The evolution of the mechanical properties, and consequently the distribution functions, are usually described by empirical expressions which cannot always be interpreted according to a physical model. Furthermore, as a rule these empirical distributions do not lead to closed expressions for all the viscoelastic functions. The mechanical properties of viscoelastic materials (amorphous polymers, metallic glasses, etc.) are described using a modified anelastic element (MAE). This modified element is analogous to the standard anelastic element, having a single characteristic time, τ, that is not a constant but a function of time or frequency. On considering a particular functional dependence of τ, it is demonstrated how several empirical viscoelastic functions are approximations of the mechanical properties of the MAE. Moreover, this functional dependence is related to the log‐normal distribution the statistical and physical meanings of which are discussed in detail. Copyright © 1993 WILEY‐VCH Verlag GmbH & Co. KGaA JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03701972_v178_n2_p311_Hermida
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Quasi‐static and dynamical tests are employed to measure the modulus or the compliance of a material as a function of time or frequency, and to determine the respective distribution function in the case of a linear viscoelastic medium. The evolution of the mechanical properties, and consequently the distribution functions, are usually described by empirical expressions which cannot always be interpreted according to a physical model. Furthermore, as a rule these empirical distributions do not lead to closed expressions for all the viscoelastic functions. The mechanical properties of viscoelastic materials (amorphous polymers, metallic glasses, etc.) are described using a modified anelastic element (MAE). This modified element is analogous to the standard anelastic element, having a single characteristic time, τ, that is not a constant but a function of time or frequency. On considering a particular functional dependence of τ, it is demonstrated how several empirical viscoelastic functions are approximations of the mechanical properties of the MAE. Moreover, this functional dependence is related to the log‐normal distribution the statistical and physical meanings of which are discussed in detail. Copyright © 1993 WILEY‐VCH Verlag GmbH & Co. KGaA
format JOUR
author Hermida, É.B.
spellingShingle Hermida, É.B.
Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element
author_facet Hermida, É.B.
author_sort Hermida, É.B.
title Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element
title_short Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element
title_full Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element
title_fullStr Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element
title_full_unstemmed Description of the Mechanical Properties of Viscoelastic Materials Using a Modified Anelastic Element
title_sort description of the mechanical properties of viscoelastic materials using a modified anelastic element
url http://hdl.handle.net/20.500.12110/paper_03701972_v178_n2_p311_Hermida
work_keys_str_mv AT hermidaeb descriptionofthemechanicalpropertiesofviscoelasticmaterialsusingamodifiedanelasticelement
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