Abstract
The aim of the present article is to compare the strength of the adhesive lap joints of the selected materials used in aviation. The joints were made in the similar and dissimilar systems with the use of three epoxy adhesives. Three different adherends were used: the EN AW-7075 aluminium alloy, the aramid-epoxy composite and the carbon-epoxy composite. Three adhesive compounds based on the Epidian 53 epoxy resin and three types of curing agents: two amine curing agents—Z1 (triethylenetetramine curing agent) and IDA, and one polyamide curing agent—PAC (polyaminoamide C) were used to make the adhesive joints. Three variants of similar joints and two variants of dissimilar joints were prepared for the tests. The shear strength was defined according to the ISO 4587 standard, with the use of Zwick/Roell 150 testing machine. In addition, the joined materials’ surface roughness was measured. Based on the strength test’s results, it was observed that the highest strength was obtained by the adhesive joints made with the Epidian 53/PAC/100:80 adhesive compound and that, in the majority of cases; similar joints show higher strength.
Highlights
Bonding technology is one of the most popular methods of joining various constructional materials [1,2,3]
After analysing the results presented above, it was stated that the highest strength result was obtained by the joint with the polyaminoamide C (PAC) curing agent
The present article was aimed at comparing the strength of the dissimilar and the similar joints made with use of three different adhesive compounds
Summary
Bonding technology is one of the most popular methods of joining various constructional materials [1,2,3] It plays a vital role in production of different types of machines and tools [2]. This fact results from numerous advantages of the adhesive joints. One of the most important advantages is the ability to make dissimilar joints [5, 16,17,18] He and Ge [4] tested the effect of similar versus dissimilar assembled adherends of adhesively bonded composite joints, on the dynamic strength of single-lap. Pinto et al [16] investigated the tensile strength of single-lap joints between similar and dissimilar adherends (included polyethylene (PE), polypropylene (PP), carbon-epoxy (CFRP), and glass-polyester (GFRP) composites) bonded with an acrylic adhesive
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