Non-linear Constitutive Model for the Oligocarbonate Polyurethane Material

Marek Pawlikowski

doi:10.1007/s10118-014-1549-z

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Non-linear Constitutive Model for the Oligocarbonate Polyurethane Material

Updated：2021-06-21

- Non-linear Constitutive Model for the Oligocarbonate Polyurethane Material
- Chinese Journal of Polymer Science Vol. 32, Issue 12, Pages: 1666-1677(2014)
- Affiliations：
  
  Warsaw University of Technology, Institute of Mechanics and Printing, 02-524 Warszawa, Poland
- Author bio：
  
  **Marek Pawlikowski, E-mail: m.pawlikowski@wip.pw.edu.pl
- Funds：
- DOI：10.1007/s10118-014-1549-z
  CLC：
- Received：24 March 2014，
  
  Revised：2014-05-24，
  
  Accepted：29 May 2014，
  
  Published：2014-12
- Accepted：
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Marek Pawlikowski. Non-linear Constitutive Model for the Oligocarbonate Polyurethane Material[J]. Chinese Journal of Polymer Science, 2014, 32(12): 1666-1677.
DOI：

Marek Pawlikowski. Non-linear Constitutive Model for the Oligocarbonate Polyurethane Material[J]. Chinese Journal of Polymer Science, 2014, 32(12): 1666-1677. DOI： 10.1007/s10118-014-1549-z.

摘要

Abstract

The polyurethane

which was the subject of the constitutive research presented in the paper

was based on oligocarbonate diols Desmophen C2100 produced by Bayer

. The constitutive modelling was performed with a view to applying the material as the inlay of intervertebral disc prostheses. The polyurethane was assumed to be non-linearly visco-hyperelastic

isotropic and incompressible. The constitutive equation was derived from the postulated strain energy function. The elastic and rheological constants were identified on the basis of experimental tests

i.e.

relaxation tests and monotonic uniaxial tests at two different strain rates

i.e.

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= 0.1 min

-1

and

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= 1.0 min

-1

. The stiffness tensor was derived and introduced to Abaqus

finite element (FE) software in order to numerically validate the constitutive model. The results of the constants identification and numerical implementation show that the derived constitutive equation is fully adequate to model stress-strain behavior of the polyurethane material.

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