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Optimizing glue joint of aluminium metallic foams

Nowacki J., Sajek A.

Journal of Achievements in Materials and Manufacturing Engineering

2016

Vol. 75, nr 1

14--23

Purpose: Characteristics of aluminium foams as construction material were given, along with some exemplary applications. The purposefulness of lowering the mass of constructions comprising aluminium foams was discussed, and bonding techniques as well as prospects of reducing the mass of a joint were analysed. A computer simulation was performed for a representative fragment of a glue joint in aluminium foam with the purpose of analyzing existing stresses for three variants of thickness of a layer of epoxy glue. Design/methodology/approach: Preliminary tests on the complete test specimen were conducted, and then a new model of a joint was made, based on a small part of the geometry of the joint. The methodology employed allowed for a precise investigation of the working conditions of a glue joint in a statics hear test depending on the thickness of a layer of glue. Findings: A high interdependence between stresses in a metallic foam and the thickness of a glue joint was observed – the thicker the layer of glue, the stiffer the joint. The thickness of the 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 an improved yet simplified model of a joint that allowed to determine stresses present both in metallic foam and in the weld. Further course of action in the modelling of glue joints was set with the aim of establishing a more detailed definition of weld work conditions. Practical implications: Basic factors affecting the efficiency of joining aluminium foams by means of gluing were defined, and guidelines concerning the technology for producing a proper joint were given. Originality/value: A problem concerning gluing aluminium foams with regard to mass optimization was highlighted. A mechanism for minimizing stresses in the structure of a weld through the regulation of weld thickness was presented.

Program wspomagający dobór uszczelki płaskiej i dokonujący obliczeń złącz kołnierzowo-śrubowych SPETECH-PARTNER®

Zajączek J.

Dozór Techniczny

2002

z. 2

32--34