A master curve approach to model short- and long-term time-dependent nonlinear behavior of polyethylene

This paper presents a new approach for modeling the constitutive behavior of time-dependent materials by applying two phenomenological constitutive models to creep curves. Data obtained from short-term test are used for predicting the long-term behavior. The nonlinear viscoelastic response is modele...

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Bibliographic Details
Published in:	Mechanics of advanced materials and structures Vol. 29; no. 26; pp. 5247 - 5254
Main Authors:	Kühl, Andre, Polak, Maria Anna
Format:	Journal Article
Language:	English
Published:	Abingdon Taylor & Francis 26-10-2022 Taylor & Francis Ltd
Subjects:	Constitutive models Creep tests long-term master curve Mathematical models modeling Nonlinear response polyethylene Polyethylenes Time dependence Viscoelastic viscoplastic
Online Access:	Get full text
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Description
Summary:	This paper presents a new approach for modeling the constitutive behavior of time-dependent materials by applying two phenomenological constitutive models to creep curves. Data obtained from short-term test are used for predicting the long-term behavior. The nonlinear viscoelastic response is modeled by using the multi-Kelvin model and the viscoplastic behavior is described by a power law. The methodology proposed herein for obtaining the constitutive formulation is based on developing master curves. Results obtained for polyethylene are discussed and compared using creep tests at different stress levels and has proved to be reliable based on the results analyzed in this work.
ISSN:	1537-6494 1537-6532
DOI:	10.1080/15376494.2021.1952496