Adhesively bonded aluminium double-strap joints: effects of patch part on failure load
- PDF / 3,339,575 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 48 Downloads / 164 Views
(2020) 42:589
TECHNICAL PAPER
Adhesively bonded aluminium double‑strap joints: effects of patch part on failure load B. Paygozar1 · M. D. Banea2 · M. A. Saeimi Sadigh3 · L. F. M. da Silva4 Received: 24 June 2020 / Accepted: 9 October 2020 © The Brazilian Society of Mechanical Sciences and Engineering 2020
Abstract This study aims to predict the failure loads of adhesive double-strap joints (DSJs) with the help of validated finite element (FE) analyses performed in a commercial FE package (ABAQUS/Standard). The damage initiation and propagation in the adhesive was evaluated by a cohesive zone model. The effects of the patch part (i.e. material, length and thickness of the patch) on the failure load of the DSJs joints are investigated. In addition, a stress analysis of the adherends and patch part is performed to provide insights into the stress distribution in the materials, thereby avoiding potential premature or unsuitable failure in the different parts of the joints. It is revealed that the dimensions of the patch can have measurable influences on the failure load and the stress distribution in different parts of the joint which may threaten the suitable performance of the joints. Moreover, the results obtained from the joints with both aluminium and composite straps are almost the same, although considering the weight added to the system, the latter outweighs the other. Keywords Double-strap adhesive joints · Failure load · Stress distribution · Patch part · Cohesive zone model
1 Introduction Adhesive joints are broadly used in a variety of industries such as aeronautical, automotive and marine. This technique of joining different parts together outweighs bolting and riveting due to its special features such as low added weight, uniform stress concentration and suitable fatigue performance [1, 2]. Adhesive bonding includes several joint types such as: single lap, double lap, single and double strap [3]. There are several studies in the literature that investigated DSJs [4–6]. For example, Marques and da Silva [7] optimized the design Technical Editor: João Marciano Laredo dos Reis. * B. Paygozar [email protected] 1
Department of Mechanical Engineering, TED University, Ankara, Turkey
2
Federal Center of Technological Education in Rio de Janeiro, Rio de Janeiro, Brazil
3
Department of Mechanical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran
4
Department of Mechanical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
of the DSJs through an experimental and numerical study. It was showed that the stress concentration reduces when a taper angle of 45° is applied. An increment of 30% was reported for joints benefitting from stiff adhesive and tapered patches. Similarly, increasing the strength of DSJs was found for the joints with longer patches [8]. However, this enhancement is not proportional due to the shearing effects between the adherends and patches. Embedded patches as a technique for improving the joint strength were also studied by Pint
Data Loading...
