The closed-cell foam is a composite with gas and solid phases. At the microlevel, the polystyrene foam was considered as a regular cellular structure whose complex of mechanical properties depends on the properties of polystyrene as an elastic-plastic material. At the macrolevel, the foam was regarded as a solid hyperelastic compressible medium, whose constants were determined in the ANSYS package according to the corresponding calculated deformation diagrams in uniaxial tension/compression, pure shear, and two- and three-axial compression. This technique was tested in the problem on indentation of a rigid sphere into the foam. The calculated indentation curves are in satisfactory agreement with experimental data.
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Acknowledgments
This investigation was carried out at the South Ural State University (National Research University) with a financial support of Russian Science Foundation (project No. 14-19-00327).
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 51, No. 5, pp. 923-932 , September-October, 2015.
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Ignatova, A.V., Sapozhnikov, S.B. Two-Scale Modeling of the Mechanical Behavior of a Composite Foam. Mech Compos Mater 51, 655–660 (2015). https://doi.org/10.1007/s11029-015-9535-2
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DOI: https://doi.org/10.1007/s11029-015-9535-2