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Mechanics of aluminum foam-polymer hybrids

Mechanik von Aluminiumschaum-Polymer-Hybriden
: Stöbener, K.; Baumeister, J.; Rausch, G.; Busse, M.

Lefebvre, L.P.:
Porous metals and metallic foams, MetFoam 2007 : Proceedings of the Fifth International Conference on Porous Metals and Metallic Foams. September 5-7, 2007, Montreal, Canada
Lancaster, Pa.: DEStech Publications, 2008
ISBN: 978-1-932078-28-2
ISBN: 1-9320-7828-2
International Conference on Porous Metals and Metallic Foams (MetFoam) <5, 2007, Montreal>
Conference Paper
Fraunhofer IFAM ()
Aluminiumschaum; Druckfestigkeit; Hybridwerkstoff; Polymer; Spannungs-Dehnungs-Diagramm; Verbundwerkstoff

With Advanced Pore Morphology (APM) aluminum foam a new process route targeted at foam application in foam-filled structures is introduced APM foams are made from spherical, small volume foam elements joined to each other in a separate process step. Joining the aluminum foam elements by adhesive bonding delivers a hybrid structure with approx. 80-95 wt-% aluminum foam and 5- 20 wt.-% adhesive (polymer). The APM approach provides good pore morphology control, automatic production and therefore enables cost effective aluminum foam application. Uni-axial compression tests on APM foam samples revealed main influencing parameters on aluminum foampolymer hybrids mechanics. The polymer for adhesive bonding of aluminum foam spheres plays a major role in terms of general deformation pattern and stress vs. strain curve progression. Compared with other closed cell aluminum foams (e.g. FOAMINAL) APM aluminum foams show similar deformation behavior with marginally lower stress levels. Identified differences can be correlated with the open porosity (space between foam spheres) in APM samples. Introduction of APM foams into aluminum extrusion profiles resulted in a change of the extrusion's deformation pattern as described for other closed aluminum foam fillings. Analytic modeling of APM foam by cubic arrangement of ideal spheres under uni-axial loading allowed for further understanding of deformation mechanics and prediction of stress vs. strain curves in good agreement with experimental results.
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