Load capacity of single-lap adhesive joints made of 2024-T3 aluminium alloy sheets after shot peening

Abstract

The goal of the work reported was to determine the influence of selected shot peening parameters on the deflection of the Almen strip and the load capacity of single-lap adhesive joints made of 2-mm-thick aluminium alloy EN AW-2024-T3. Moreover, the research was aimed at checking the possibility of using the Almen strip deflection indicator to predict the load capacity of adhesive joints after shot peening. The analysis was carried out according to Hartley’s PS/DS-P:Ha3 plan. The input factors were the shot peening parameters: treatment time t (60–180 s), ball diameter dk (0.5–1.5 mm) and compressed air pressure p (0.3–0.5 MPa). It has been proved in this work that shot peening treatment of the outer surface of single-lap adhesive joints can be used to strengthen the joint. The maximum increase in the load capacity of the shot peened joints was 33.4%. It was observed that the load capacity of the joints decreases with an increase in the deflection of the Almen strip (in the assumed area of variability of technological parameters). Moreover, the results obtained indicate that the adoption of too intensive treatment, manifested in high values of deflection of the Almen strip, may weaken single-lap adhesive joints.

The Influence of Shot Peening on the Stress State in the Adhesive Layer and the Load Capacity of Adhesive Joints

“…Moreover, a numerical simulation was carried out in order to assess the impact of shot peening of the lap zone on the stress state in the adhesive layer. The research presented in this article is a continuation of the research presented in [34]. 2…”

Copolymers of Vinyl Acetate and Vinyl Carboxylates Bearing Branched C7–C9 Chains: Synthesis, Alcoholysis, and Properties

“…The aluminum alloy is widely used in the aeronautic, aerospace, and automotive industries due to its good fatigue, high strength-to-weight ratio, and temperature resistance. However, it is nonweldable and has low corrosion resistance. − The stress–strain curves are shown in Figure S6, and the ultimate shear stress (USS) data is presented in Figure . As clearly shown in Figure , the USS of the lap joint increased from 3.60 ± 0.17 to 4.87 ± 0.02 MPa as the content of PVVOH (20 wt % VV-9) increased from 0 to 25 wt %.…”