Analysis of the Macroscopic Behaviour of PMI Foam

Abstract:

o accurately simulate the foam core in composite parts on a macroscopic scale the morphology, the characterisation, and the nonlinear behaviour of thefoam must be understood properly. Accounting for the heterogeneity and the mechanical properties of the foam core affects the dimensioning of the final part.In the present study the microstructure of the foam samples were characterized using scanning electron microscopy. To determine the bulk material behavior and the strength limitations of the nonlinear foam, shear and compressions tests are performed. All numerical calculations were carried out on the macroscopic level.A basic challenge in the finite element modelling of hyperelastic materials by means of test data is the identification of material model coefficients which are appropriate to describe the behaviour of the considered foam.

• Periodical: Key Engineering Materials (Volume 809)
• Pages: 285-290
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.809.285
• Online since: June 2019
• Authors: Michaela Nagler*, Michael Thor, Peter Peyrer, Gernot Schneiderbauer, Franz M. Sendner, Markus Wolfahrt, Roland Hinterhölzl
• Keywords: Hyperfoam, Material Model Identification, Material Testing

References

[1] L.J. Gibson, M.F. Ashby and S.K., Testing, Cellular Solids-Structures and Properties, Second Ed. Cambridge University Press, (1997).

[2] G.A. Holzapfel, Nonlinear solid mechanics, A continuum approach for engineering science, Meccanica, 37:489-490, (2002).

[3] R.W. Ogden, Large deformation isotropic elasticity-on the correlation of theory and experiment for incompressible rubberlike solids, Proc Roy Soc Lond A, 326:565-584, (1972).

DOI: 10.1098/rspa.1972.0026

[4] M.A. Mooney, A theory of large elastic deformation, J Applied Physics, 11: 582-592, (1940).

[5] Rs Rivlin, Large elastic deformations of isotropic materials, I. Fundamental concepts. Phil Trans Roy Soc Lond, 240:459-490, (1948).

DOI: 10.1098/rsta.1948.0002

[6] D. Boast, V.A. Coveney, Professional Engineering Publishing Ltd., London, (1999).

[7] ABAQUS 6.14 Theory Manual, ABAQUS, Inc., Providence, RI.

[8] M.T. Petre, A. Erdemir, P.R. Cavanagh, Determination of elastomeric foam parameters for simulations of complex loading, Computer Methods in Biomechanics and Biomedical Engineering 9, 231-242, (2006).

DOI: 10.1080/10255840600747620

[9] N.J. Mills and A. Gilchrist, Modelling the indentaion of low density polymer foams, Cell Poym., 19, pp.389-412, (2000).

[10] G. Liang, K. Chandrashekhara, Neural network based constitutive model for elastomeric foams, Engineering Structures 30, 2002-2011, (2008).

DOI: 10.1016/j.engstruct.2007.12.021

[11] C. Briody, B. Duignan, S. Jerrams, Testing, modelling and validation of numerical model capable of predicting stress fields throughout polyurethane foam, Proceedings of Seventh European Conference on Constitutive Models of Rubber (ECCMR), Ireland, 20-23, (2011).

DOI: 10.1201/b11687-27