Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos
Measurements and modeling of the nonlinear viscoelastic properties of a high viscosity silicone oil (polydimethylsiloxane, PDMS) are reported. LAOS test were performed with a high precision rotational rheometer to probe the nonlinear response. The measurements show that the material can be safely co...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2016-02-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.3933/applrheol-26-14289 |
| _version_ | 1818664767134367744 |
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| author | Kőkuti Z. Völker-Pop L. Brandstätter M. Kokavecz J. Ailer P. Palkovics L. Szabó G. Czirják A. |
| author_facet | Kőkuti Z. Völker-Pop L. Brandstätter M. Kokavecz J. Ailer P. Palkovics L. Szabó G. Czirják A. |
| author_sort | Kőkuti Z. |
| collection | DOAJ |
| description | Measurements and modeling of the nonlinear viscoelastic properties of a high viscosity silicone oil (polydimethylsiloxane, PDMS) are reported. LAOS test were performed with a high precision rotational rheometer to probe the nonlinear response. The measurements show that the material can be safely considered linear below strain amplitude 1. The viscous Lissajous-Bodwitch curves indicate intracycle shear thinning, whereas the elastic Lissajous-Bodwitch curves indicate intracycle strain stiffening in the nonlinear regime. Secondary loops in some of the measured viscous stress curves are attributed to a non-sinusoidal shear rate signal. A multi-element White-Metzner model is used as a constitutive equation, which accurately describes the LAOS data in all measured cases. Based on the extension of the measured data by simulations, nonlinear properties are analyzed both for the elastic and for the viscous part. It is observed that the nonlinearity considerably increases the weight of the higher harmonics in the shear stress signal. It is predicted that the viscous nonlinearity has a maximum around 50 rad/s angular frequency, and that the elastic nonlinearity becomes nearly independent of the angular frequency above 30 rad/s. |
| first_indexed | 2024-12-17T05:37:58Z |
| format | Article |
| id | doaj.art-6955a34fbfbc4b8bae2933a56055a42a |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-12-17T05:37:58Z |
| publishDate | 2016-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-6955a34fbfbc4b8bae2933a56055a42a2022-12-21T22:01:33ZengDe GruyterApplied Rheology1617-81062016-02-012611910.3933/applrheol-26-14289Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with LaosKőkuti Z.0Völker-Pop L.1Brandstätter M.2Kokavecz J.3Ailer P.4Palkovics L.5Szabó G.6Czirják A.7Institute of Engineering and Materials Science, University of Szeged, Tisza L. krt. 103, 6720Szeged, HungaryAnton Paar Germany GmbH, Helmuth-Hirth-Str. 6, 73760Ostfildern, GermanyAnton Paar GmbH, Anton-Paar-Str. 20, 8054Graz, AustriaInstitute of Engineering and Materials Science, University of Szeged, Tisza L. krt. 103, 6720Szeged, HungaryDepartment of Vehicle Technology, Kecskemét College, Izsáki út 10, 6000Kecskemét, HungaryDepartment of Vehicle Technology, Kecskemét College, Izsáki út 10, 6000Kecskemét, HungaryInstitute of Engineering and Materials Science, University of Szeged, Tisza L. krt. 103, 6720Szeged, HungaryInstitute of Engineering and Materials Science, University of Szeged, Tisza L. krt. 103, 6720Szeged, HungaryMeasurements and modeling of the nonlinear viscoelastic properties of a high viscosity silicone oil (polydimethylsiloxane, PDMS) are reported. LAOS test were performed with a high precision rotational rheometer to probe the nonlinear response. The measurements show that the material can be safely considered linear below strain amplitude 1. The viscous Lissajous-Bodwitch curves indicate intracycle shear thinning, whereas the elastic Lissajous-Bodwitch curves indicate intracycle strain stiffening in the nonlinear regime. Secondary loops in some of the measured viscous stress curves are attributed to a non-sinusoidal shear rate signal. A multi-element White-Metzner model is used as a constitutive equation, which accurately describes the LAOS data in all measured cases. Based on the extension of the measured data by simulations, nonlinear properties are analyzed both for the elastic and for the viscous part. It is observed that the nonlinearity considerably increases the weight of the higher harmonics in the shear stress signal. It is predicted that the viscous nonlinearity has a maximum around 50 rad/s angular frequency, and that the elastic nonlinearity becomes nearly independent of the angular frequency above 30 rad/s.https://doi.org/10.3933/applrheol-26-14289laospdmsnonlinear viscoelasticitywhite-metzner modelintracycle shear thinning |
| spellingShingle | Kőkuti Z. Völker-Pop L. Brandstätter M. Kokavecz J. Ailer P. Palkovics L. Szabó G. Czirják A. Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos Applied Rheology laos pdms nonlinear viscoelasticity white-metzner model intracycle shear thinning |
| title | Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos |
| title_full | Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos |
| title_fullStr | Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos |
| title_full_unstemmed | Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos |
| title_short | Exploring the Nonlinear Viscoelasticity of a High Viscosity Silicone Oil with Laos |
| title_sort | exploring the nonlinear viscoelasticity of a high viscosity silicone oil with laos |
| topic | laos pdms nonlinear viscoelasticity white-metzner model intracycle shear thinning |
| url | https://doi.org/10.3933/applrheol-26-14289 |
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