Numerical and experimental study of real foam microstructure models

• Autorzy: Miedzińska A. , Szymczyk W.
• Języki publikacji: EN

Abstrakty

EN

Metal foams are new, as yet imperfectly characterized, class of materials with low densities and novel physical, mechanical, thermal, electrical and acoustic properties. They offer a potential for lightweight structures, for energy absorption, and for thermal management; and at least some of them are cheap. Such characteristics have been appreciated by the automotive industry in the aspect of crash and impact phenomenon. Energy absorption capacity of foams under dynamic load was analytically confirmed based on a rigid-perfectly plastic-locking foam model. In this paper the development process of a real closed cell foam microstructure based on finite element model with the use of SD scanning is shown. Computed tomography (CT) is a medical imaging method employing tomography created by computer processing. Digital geometry processing is used to generale a three-dimensional image of the inside of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. The numerical analyses carried out with the usage of LS Dyna computer code of the quasi static and dynamic compression tests are presented. The most important mechanisms and phenomena that appeared in the microstructural sample are described. In the final part of these investigations the comparison process between numerical and experimental test was performed. The results confirmed the good correspondence between both tests.

Słowa kluczowe

EN

microstructure; aluminium foam; 3D scanning

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2010
• Tom: Vol. 17, No. 2
• Strony: 309--314
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Miedzińska A.

autor

Szymczyk W.

• Military University of Technology, Faculty of Mechanical Engineering Department of Mechanics and Applied Computer Science Kaliskiego Street 2, 00-908 Warsaw, Poland tel: [phone], fax: [phone],

Bibliografia

• [1] Gibson, L. J., Ashby, M. F., Cellular Solids: structure and properties, 1st edition, Cambridge university press, U.K. 1997.
• [2] Thomson, W., On the division of space with minimum partitional area, Philosophical Magazine Vol. 24, No. 151, p. 503, 1887.
• [3] Hall, R. B., Hager, J. W., Performance limits for stiffness-critical graphitic foam structures, Comparisons with high-modulus foams, refractory alloys and graphite-epoxy composites, Journal of Composite Materials, Vol. 30, No. 17, pp. 1922-1937, 1996.
• [4] Li, K., Gao, X. L., Roy, A. K., Micromechanics model for three-dimensional open-cell foams using a tetrakaidecahedral unit cell and Castigliano's second theorem, Composites Science and Technology, Vol. 63, pp. 1769-1781, 2003.
• [5] Biswal, B., Manwart, C., Hilfer, R., Three-dimensional local porosity analysis of porous media, Physica A 255, pp. 221-241, 1998.
• [6] Huang, W., Donato, G., Blunt, M. J., Comparison of streamline-based and grid-based dual porosity simulation, Journal of Petroleum Science and Engineering 43, pp. 129-137, 2004.
• [7] Mishnaevsky, Jr L. L., Automatic Voxel-Based Generation Of 3D Microstructural FE Models And Its Application To The Damage Analysis Of Composites, Materials Science and Engineering A 407, pp. 11-23, 2005.
• [8] Danielsson, M., Parks, D. M., Boyce, M. C., Three-dimensional micromechanical modelling of voided polymeric materials, Journal of Mechanics and Physiscs of Solids 50, pp. 351-379, 2002.
• [9] Kraynik, A. M., Reinelt, D. A., Linear Elastic Behavior of Dry Soap Foams, Journal of Colloid and interface Science 181, pp. 511-520, 1996.
• [10] Hallquist, J.O., LS-DYNA, Theoretical manual, California Livermore Software Technology Corporation, 1998.