Analytical modeling of indentation of composite sandwich beam

This paper deals with static indentation of sandwich beams with a foam core. An analytical model is presented assuming that the specific response of foams in compression can be assimilated to an elastic–perfectly plastic behavior. The elastic part is represented using Vlasov’s model. The displacemen...

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Bibliographic Details
Published inComposite structures Vol. 100; pp. 79 - 88
Main Authors Navarro, P., Abrate, S., Aubry, J., Marguet, S., Ferrero, J.-F.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2013
Elsevier
Subjects
Analytical modeling
Engineering Sciences
Indentation
Mechanics
Non-linear behaviour
Sandwich structures
Analytical modeling
Non-linear behaviour
Sandwich structures
Indentation
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Summary:This paper deals with static indentation of sandwich beams with a foam core. An analytical model is presented assuming that the specific response of foams in compression can be assimilated to an elastic–perfectly plastic behavior. The elastic part is represented using Vlasov’s model. The displacements and stress calculated with this two parameters model are compared with results given by Winkler’s theory and Finite Element Method. Vlasov’s idealization gives more accurate results that Winkler’s model. A complete study of the influence of the parameters of Vlasov’s model is performed. Then, plasticity is added to the model to represent the non-linear response of the core. The load–displacement response of sandwich beams under static indentation is calculated and compared to experimental and Finite Element results. A good correlation is found. The size of the area where the foam is crushed given by the developed model is in good agreement with Finite Element analysis.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2012.12.017