Experimental Strength Analysis of Riveted Joints Using Blind Rivets

Abstract

This article presents results of experimental investigations of the lap blind riveted joint. The main goal of the work is determination of destructive load of the blind riveted joints. The blind rivets were originally used in the aircraft structures where access to both sides of the riveted structure is impossible. Blind rivets are now commonly used in many branches of industry because of their low cost. Moreover, the riveting process is uncomplicated. There are many publications about analysis of strength of solid rivets in the research literature. However, the strength analysis of the blind rivets was rarely undertaken. There is the research gap in the analysis of both the strength and the load capacity of blind riveted joints. The influence of selected geometrical parameters of the joint on the stress distribution and the destructive force was not widely described in literature. The first part of the work presents a review of standards and publications related to stress and strength analysis of blind riveted joints. The next part of the study describes experimental investigations of joints. The examined specimens were made out of AW 2017 aluminum alloy, cut from 1[mm] thick sheet. Investigated blind rivets were made out of aluminum alloy. The lap joint with one rivet and the single row five-rivet joint were investigated. Moreover, the different size of hole chamfer were considered. The experimental tests were performed with the use of Zwick-Roell tension machine. The main results of experimental investigations are ultimate shear load diagrams. The influence of both the hole chamfer and the number of rivets on destructive force and shear diagrams of blind riveted joints were in detail analysed. After shear tests, the fractured rivets were magnified in order to explain the failure phenomenon of blind rivets. In the future research works the obtained results will be used in strength analysis of the blind riveted joints using the finite element method.

Influence of Hole Chamfer Size on Strength of Blind Riveted Joints

“…It was concluded that higher strength of joints was always observed during the shear loading than in the crosstension test. In publication [13] authors examined the strength of riveted joints with a blind rivet for single-row and five-row lap joint, additionally. Moreover for a single-row joint the geometric parameter as size of the hole chamfer was considered.…”

Material Model Effect for Simulating a Single-Lap Joint with a Blind Rivet

“…However, the influence of the material model on the distribution of stresses and deformations, as well as the influence of other geometric parameters on the load capacity of the riveted joint was not given. From the point of view of this work, the achievements presented in the publication [ 21 ] were very important; the authors analyzed in detail the strength of a single-lap joint with a blind rivet and the influence of the hole chamfer size on the joint load capacity. Shear curves proved that the size of the hole chamfer has a great influence on the strength of the joint and the deformation of the rivet during shear.…”