Investigations on the viscoelastic material behaviour and linearity limits of PVB

ce/papers ◽  
2021 ◽  
Vol 4 (6) ◽  
pp. 207-223
Author(s):  
Miriam Schuster ◽  
Kerstin Thiele ◽  
Jens Schneider
Keyword(s):  
Viscoelastic Material ◽  
Material Behaviour

scholarly journals Modelling of viscoelastic material behaviour close to the glass transition temperature

PAMM ◽  
2009 ◽  
Vol 9 (1) ◽  
pp. 351-352 ◽  
Author(s):  
Michael Johlitz ◽  
Stefan Diebels ◽  
Alexander Lion ◽  
Wulff Possart
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Viscoelastic Material ◽  
Material Behaviour

Elastic and viscoelastic material behaviour of fresh and glutaraldehyde-treated porcine aortic valve tissue

1983 ◽  
Vol 16 (5) ◽  
pp. 339-348 ◽  
Author(s):  
E.P.M. Rousseau ◽  
A.A.H.J. Sauren ◽  
M.C. van Hout ◽  
A.A. van Steenhoven
Keyword(s):  
Aortic Valve ◽  
Viscoelastic Material ◽  
Material Behaviour ◽  
Valve Tissue

scholarly journals Viscoelastic material models for more accurate polyethylene wear estimation

2018 ◽  
Vol 53 (5) ◽  
pp. 302-312 ◽  
Author(s):  
Gioacchino Alotta ◽  
Olga Barrera ◽  
Elise C Pegg
Keyword(s):  
Molecular Weight ◽  
Finite Element ◽  
Viscoelastic Material ◽  
Polyethylene Wear ◽  
Material Model ◽  
Elastoplastic Material ◽  
Material Behaviour ◽  
Material Models ◽  
Ultra High Molecular Weight ◽  
Implant Wear

Wear debris from ultra-high-molecular-weight polyethylene components used for joint replacement prostheses can cause significant clinical complications, and it is essential to be able to predict implant wear accurately in vitro to prevent unsafe implant designs continuing to clinical trials. The established method to predict wear is simulator testing, but the significant equipment costs, experimental time and equipment availability can be prohibitive. It is possible to predict implant wear using finite element methods, though those reported in the literature simplify the material behaviour of polyethylene and typically use linear or elastoplastic material models. Such models cannot represent the creep or viscoelastic material behaviour and may introduce significant error. However, the magnitude of this error and the importance of this simplification have never been determined. This study compares the volume of predicted wear from a standard elastoplastic model, to a fractional viscoelastic material model. Both models have been fitted to the experimental data. Standard tensile tests in accordance with ISO 527-3 and tensile creep recovery tests were performed to experimentally characterise both (a) the elastoplastic parameters and (b) creep and relaxation behaviour of the ultra-high molecular weight polyethylene. Digital image correlation technique was used in order to measure the strain field. The predicted wear with the two material models was compared for a finite element model of a mobile-bearing unicompartmental knee replacement, and wear predictions were made using Archard’s law. The fractional viscoelastic material model predicted almost ten times as much wear compared to the elastoplastic material representation. This work quantifies, for the first time, the error introduced by use of a simplified material model in polyethylene wear predictions, and shows the importance of representing the viscoelastic behaviour of polyethylene for wear predictions.

scholarly journals Viscoelastic material behaviour of PBT-GF30 under thermo-mechanical cyclic loading

2011 ◽  
Vol 10 ◽  
pp. 2141-2146 ◽  
Author(s):  
M. Pierantoni ◽  
M. De Monte ◽  
D. Papathanassiou ◽  
N. De Rossi ◽  
M. Quaresimin
Keyword(s):  
Cyclic Loading ◽  
Viscoelastic Material ◽  
Material Behaviour
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