Optimizing glue joint of aluminium metallic foams
Journal Title: Journal of Achievements in Materials and Manufacturing Engineering - Year 2016, Vol 75, Issue 1
Abstract
Purpose: Characteristics of aluminium foams as construction material were given, alongwith some exemplary applications. The purposefulness of lowering the mass of constructionscomprising aluminium foams was discussed, and bonding techniques as well as prospectsof reducing the mass of a joint were analysed. A computer simulation was performed fora representative fragment of a glue joint in aluminium foam with the purpose of analyzingexisting stresses for three variants of thickness of a layer of epoxy glue.Design/methodology/approach: Preliminary tests on the complete test specimenwere conducted, and then a new model of a joint was made, based on a small part of thegeometry of the joint. The methodology employed allowed for a precise investigation of theworking conditions of a glue joint in a static shear test depending on the thickness of a layerof glue.Findings: A high interdependence between stresses in a metallic foam and the thickness ofa glue joint was observed – the thicker the layer of glue, the stiffer the joint. The thickness ofthe glue layer inspected in the simulation does not influence the strength of the joint.Research limitations/implications: The tests were conducted with the use of animproved yet simplified model of a joint that allowed to determine stresses present both inmetallic foam and in the weld. Further course of action in the modelling of glue joints wasset with the aim of establishing a more detailed definition of weld work conditions.Practical implications: Basic factors affecting the efficiency of joining aluminium foamsby means of gluing were defined, and guidelines concerning the technology for producinga proper joint were given.Originality/value: A problem concerning gluing aluminium foams with regard to massoptimization was highlighted. A mechanism for minimizing stresses in the structure of a weldthrough the regulation of weld thickness was presented.
Authors and Affiliations
J. Nowacki, A. Sajek
Keywords
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