Parameter Estimation of a Hyperelastic Constitutive Model for the Description of Polyurethane Foam in Large Deformation

Polyurethane foam is widely used in such areas as the automotive industry and sport, and in the field of packaging because of its low stiffness, high compressibility and its ability to absorb strain energy. The quasi-static behaviours of polyurethane foam are highly nonlinear and elastic. This paper...

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Bibliographic Details
Published inCellular polymers Vol. 32; no. 1; pp. 21 - 40
Main Authors Ju, M.L., Mezghani, S., Jmal, H., Dupuis, R., Aubry, E.
Format Journal Article
LanguageEnglish
Published London Sage Publications Ltd. (UK) 01.01.2013
Sage Publications Ltd
Smithers Rapra
Subjects
Composition
Deformations (Mechanics)
Elasticity
Engineering Sciences
Foamed materials
Materials science
Mechanical properties
Mechanics
Parameter estimation
Plastic foams
Polyurethane
Polyurethanes
Studies
France
Tunisia
Quasi-static behaviour
Uniaxial compression
Ogden's model
Parameter identification
Polyurethane foam
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Summary:Polyurethane foam is widely used in such areas as the automotive industry and sport, and in the field of packaging because of its low stiffness, high compressibility and its ability to absorb strain energy. The quasi-static behaviours of polyurethane foam are highly nonlinear and elastic. This paper demonstrates that the nonlinear elastic mechanical behaviour of compressible polyurethane foam during the loading and unloading quasi-static compression tests can be described by applying Ogden's modified model. The experimental data from a uniaxial compression of three types of polyurethane foam in three different strain rates are used for parameter identification. A nonlinear optimization method helps to ensure that the parameters are satisfied with stability conditions. Thanks to the optimized parameter results, the numerical simulations agree with the experimental data. Finally, the errors between the model results and the experimental results are analyzed and the unloading phases are discussed in detail.
ISSN:0262-4893
1478-2421
DOI:10.1177/026248931303200102