Strength Analysis of Lap Joints in Aerospace Structural Materials

Abstract

This paper is a study on the results of strength tests on single-lap joints used primarily in the aerospace industry, based on a Hi-Lok fastener. Two popular structural materials used in the aerospace industry were considered in this work. The test specimens were fabricated from the EN-AW 2024 T3 aluminium alloy and a carbon composite. It was decided to use the Naftoseal MC780 type C adhesive as a sealant to form the required hermetic, air-tight lap joints. In the definition of the joint type used, the results are presented for the tests of selected 2D and 3D surface roughness parameters, with isometric imaging of the surfaces related to this analysis. Microscopic images acquired at a magnification of x500 illustrate the surface quality. This work concludes with a discussion of the test results and conclusions.

Evaluation of Machinability Indicators in Milling of Thin-Walled Composite Structures

“…cutting, turning, milling, and drilling, requires the use of tools and made of wear-resistant material [1]. Owing to the quality of the obtained surface, composites are widely used in many branches, replacing both durable yet heavy steel as well as lightweight yet not durable aluminum alloys [2][3][4][5][6].…”

Durability and Corrosion Resistance Test of Adhesive Joints Using Two Adherence Promoters for the Connection of Aerospace Aluminum Alloys

“…Aluminum bonding technology in aircraft is an area of continuous research and development [1][2][3][4]. Further solutions are being sought to ensure increased strength, stiffness, and durability of adhesive joints [5][6][7]. Technologies for proper surface preparation used for joining attract a lot of attention [8], especially those with adhesion promoters used to repair damaged aircraft areas [9][10][11][12].…”