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COBEM 2019
25th International Congress of Mechanical Engineering
CREEP BEHAVIOR ANALYSIS OF METAL BONDED JOINTS
Submission Author:
Milla Siqueira de Paula , RJ , Brazil
Co-Authors:
Milla Siqueira de Paula , Eduardo Sampaio, RANULFO MARTINS CARNEIRO NETO
Presenter: Milla Siqueira de Paula
doi://10.26678/ABCM.COBEM2019.COB2019-2259
Abstract
Absence of heat input and better stress distribution are some of the reasons that bonded joints have been widely used. The general creep tests test only one specimen at time, so these tests have a high execution time when compared with other destructive tests. Therefore little information is found in the literature about the behavior of these unions under creep. With this motivation, the Laboratory of Adhesion and Adherence (LAA/UERJ/IPRJ) developed the Creep Pneumatic Equipment (CPE), which can test ten simultaneous test specimens with different test parameters. This work in progress investigates the creep behavior of single lap joints (SLJ) composed by metallic substrates and bonded with epoxy-based adhesive. The joint manufacturing was in accordance with some standards. Some CPE tests have already been performed, with 100 %, 70 %, 60 %, 50 % and 40 % of the rupture stress. The fractures presented in the specimens after the creep tests were predominantly cohesive, meaning that their fracture strength is mainly associated with mechanical resistance of the adhesive. The creep test of 40% of the stress is still in progress, accounting for more than 400 hours. These results will allow to obtain equations that represent the creep behavior of the joints. A finite element analysis will be performed with the help of the ABAQUS software, thus comparing the experimental results with the numerical results.
Keywords
Creep, Bonded joints, structural adhesives
