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Solids: An International and Interdisciplinary Scientific Open Access Journal
Article

Transformation of Test Data for the Specification of a Viscoelastic Marlow Model

Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße 12, 28359 Bremen, Germany
Solids 2020, 1(1), 2-15; https://doi.org/10.3390/solids1010002
Received: 6 October 2020 / Revised: 2 November 2020 / Accepted: 9 November 2020 / Published: 13 November 2020
The combination of hyperelastic material models with viscoelasticity allows researchers to model the strain-rate-dependent large-strain response of elastomers. Model parameters can be identified using a uniaxial tensile test at a single strain rate and a relaxation test. They enable the prediction of the stress–strain behavior at different strain rates and other loadings like compression or shear. The Marlow model differs from most hyperelastic models by the concept not to use a small number of model parameters but a scalar function to define the mechanical properties. It can be defined conveniently by providing the stress–strain curve of a tensile test without need for parameter optimization. The uniaxial response of the model reproduces this curve exactly. The coupling of the Marlow model and viscoelasticity is an approach to create a strain-rate-dependent hyperelastic model which has good accuracy and is convenient to use. Unfortunately, in this combination, the Marlow model requires to specify the stress–strain curve for the instantaneous material response, while experimental data can be obtained only at finite strain rates. In this paper, a transformation of the finite strain rate data to the instantaneous material response is derived and numerically verified. Its implementation enables us to specify hyperelastic materials considering strain-rate dependence easily. View Full-Text
Keywords: hyperelasticity; viscoelasticity; Marlow model; elastomer hyperelasticity; viscoelasticity; Marlow model; elastomer
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MDPI and ACS Style

Hesebeck, O. Transformation of Test Data for the Specification of a Viscoelastic Marlow Model. Solids 2020, 1, 2-15. https://doi.org/10.3390/solids1010002

AMA Style

Hesebeck O. Transformation of Test Data for the Specification of a Viscoelastic Marlow Model. Solids. 2020; 1(1):2-15. https://doi.org/10.3390/solids1010002

Chicago/Turabian Style

Hesebeck, Olaf. 2020. "Transformation of Test Data for the Specification of a Viscoelastic Marlow Model" Solids 1, no. 1: 2-15. https://doi.org/10.3390/solids1010002

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