Hydrogels are a cross-linked network of polymer swollen with a liquid, and are promising replacements for diseased or damaged load bearing tissues such as articular cartilage [1]. Recently, a linear biphasic model, developed originally for cartilage [2], has been applied to characterize the mechanical behavior of hydrogels [3, 4]. However, the linear elastic assumption for the solid phase ignores the intrinsic viscoelasticity of the polymer network [3, 4]. Some attempts have been made in the literature to simulate hydrogels with a biphasic viscoelastic model using a self-developed finite element code [5]. This study is aimed at simulating hydrogels with a biphasic viscoelastic model and investigating an inverse finite element (FE) technique to identify material parameters of hydrogels via combined creep testing and FE modeling. Creep testing of hydrogels is simulated in the commercial software ABAQUS, which makes this approach easy to adapt to other test geometries. Material parameters are identified by fitting the FE results to the experimental results using an optimization method.
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ASME 2008 Summer Bioengineering Conference
June 25–29, 2008
Marco Island, Florida, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
978-0-7918-4321-5
PROCEEDINGS PAPER
Optimization-Based Inverse Finite Element Analysis for Material Parameter Identification of a Biphasic Viscoelastic Hydrogel
Kaifeng Liu,
Kaifeng Liu
University of Notre Dame, Notre Dame, IN
Zimmer Holdings, Inc., Warsaw, IN
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Brian Thomas,
Brian Thomas
Zimmer Holdings, Inc., Warsaw, IN
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J. Craig Fryman,
J. Craig Fryman
Zimmer Holdings, Inc., Warsaw, IN
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Jeff Bischoff,
Jeff Bischoff
Zimmer Holdings, Inc., Warsaw, IN
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Timothy Ovaert,
Timothy Ovaert
University of Notre Dame, Notre Dame, IN
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James Mason
James Mason
Zimmer Holdings, Inc., Warsaw, IN
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Kaifeng Liu
University of Notre Dame, Notre Dame, IN
Zimmer Holdings, Inc., Warsaw, IN
Brian Thomas
Zimmer Holdings, Inc., Warsaw, IN
J. Craig Fryman
Zimmer Holdings, Inc., Warsaw, IN
Jeff Bischoff
Zimmer Holdings, Inc., Warsaw, IN
Timothy Ovaert
University of Notre Dame, Notre Dame, IN
James Mason
Zimmer Holdings, Inc., Warsaw, IN
Paper No:
SBC2008-192179, pp. 219-220; 2 pages
Published Online:
March 13, 2014
Citation
Liu, K, Thomas, B, Fryman, JC, Bischoff, J, Ovaert, T, & Mason, J. "Optimization-Based Inverse Finite Element Analysis for Material Parameter Identification of a Biphasic Viscoelastic Hydrogel." Proceedings of the ASME 2008 Summer Bioengineering Conference. ASME 2008 Summer Bioengineering Conference, Parts A and B. Marco Island, Florida, USA. June 25–29, 2008. pp. 219-220. ASME. https://doi.org/10.1115/SBC2008-192179
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