Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials
We explore the utility of strain-controlled large amplitude oscillatory shear (LAOS) deformation for identifying and characterizing apparent yield stress responses in elastoviscoplastic materials. Our approach emphasizes the visual representation of the LAOS stress response within the framework o...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Springer Berlin / Heidelberg
2011
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| Online Access: | http://hdl.handle.net/1721.1/61627 https://orcid.org/0000-0001-8323-2779 |
| _version_ | 1811068251671625728 |
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| author | Ewoldt, Randy H. Winter, Peter Maxey, Jason McKinley, Gareth H. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Ewoldt, Randy H. Winter, Peter Maxey, Jason McKinley, Gareth H. |
| author_sort | Ewoldt, Randy H. |
| collection | MIT |
| description | We explore the utility of strain-controlled large amplitude oscillatory shear (LAOS)
deformation for identifying and characterizing apparent yield stress responses in
elastoviscoplastic materials. Our approach emphasizes the visual representation of the LAOS
stress response within the framework of Lissajous curves with strain, strain-rate, and stress as the
coordinate axes, in conjunction with quantitative analysis of the corresponding limit cycle
behavior. This approach enables us to explore how the material properties characterizing the
yielding response depend on both strain amplitude and frequency of deformation. Canonical
constitutive models (including the purely viscous Carreau model and the elastic Bingham model)
are used to illustrate the characteristic features of pseudoplastic and elastoplastic material
responses under large amplitude oscillatory shear. A new parameter, the perfect plastic
dissipation ratio, is introduced for uniquely identifying plastic behavior. Experimental results are
presented for two complex fluids, a pseudoplastic shear-thinning xanthan gum solution and an
elastoviscoplastic invert-emulsion drilling fluid. The LAOS test protocols and the associated
material measures provide a rheological fingerprint of the yielding behavior of a complex fluid
that can be compactly represented within the domain of a Pipkin diagram defined by the
amplitude and timescale of deformation. |
| first_indexed | 2024-09-23T07:53:33Z |
| format | Article |
| id | mit-1721.1/61627 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T07:53:33Z |
| publishDate | 2011 |
| publisher | Springer Berlin / Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/616272022-09-23T09:25:42Z Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials Ewoldt, Randy H. Winter, Peter Maxey, Jason McKinley, Gareth H. Massachusetts Institute of Technology. Department of Mechanical Engineering McKinley, Gareth H. Ewoldt, Randy H. Winter, Peter McKinley, Gareth H. We explore the utility of strain-controlled large amplitude oscillatory shear (LAOS) deformation for identifying and characterizing apparent yield stress responses in elastoviscoplastic materials. Our approach emphasizes the visual representation of the LAOS stress response within the framework of Lissajous curves with strain, strain-rate, and stress as the coordinate axes, in conjunction with quantitative analysis of the corresponding limit cycle behavior. This approach enables us to explore how the material properties characterizing the yielding response depend on both strain amplitude and frequency of deformation. Canonical constitutive models (including the purely viscous Carreau model and the elastic Bingham model) are used to illustrate the characteristic features of pseudoplastic and elastoplastic material responses under large amplitude oscillatory shear. A new parameter, the perfect plastic dissipation ratio, is introduced for uniquely identifying plastic behavior. Experimental results are presented for two complex fluids, a pseudoplastic shear-thinning xanthan gum solution and an elastoviscoplastic invert-emulsion drilling fluid. The LAOS test protocols and the associated material measures provide a rheological fingerprint of the yielding behavior of a complex fluid that can be compactly represented within the domain of a Pipkin diagram defined by the amplitude and timescale of deformation. National Science Foundation (U.S.) (Graduate Research Fellowship) United States. Defense Advanced Research Projects Agency (DARPA) (Chemical Robots program) 2011-03-08T14:04:11Z 2011-03-08T14:04:11Z 2009-12 2009-05 Article http://purl.org/eprint/type/JournalArticle 0035-4511 1435-1528 http://hdl.handle.net/1721.1/61627 Ewoldt, Randy et al. “Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials.” Rheologica Acta 49.2 (2010): 191-212. https://orcid.org/0000-0001-8323-2779 en_US http://dx.doi.org/10.1007/s00397-009-0403-7 Rheologica Acta Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Springer Berlin / Heidelberg MIT web domain |
| spellingShingle | Ewoldt, Randy H. Winter, Peter Maxey, Jason McKinley, Gareth H. Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| title | Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| title_full | Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| title_fullStr | Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| title_full_unstemmed | Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| title_short | Large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| title_sort | large amplitude oscillatory shear of pseudoplastic and elastoviscoplastic materials |
| url | http://hdl.handle.net/1721.1/61627 https://orcid.org/0000-0001-8323-2779 |
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