Verification of Selected Failure Criteria for Adhesive Bonded Elements with Different Stiffness through the Use of Methacrylic Adhesive

Abstract

This study presents the testing results of methacrylic adhesive single-lap joints made from elements with different stiffness and of the adhesive itself, using cast specimens. Methods for the preparation and testing of material specimens of the adhesive joints have been presented. Moreover, an attempt was undertaken to determine the strength criterion and find out which of the presented calculation methods enables the most precise assessment of strength in the tested group of single-lap joints, that differ in terms of the adhered stiffness and thickness. For this purpose, C45 steel and 5754 aluminium flat bars were bonded. Stress distributions were determined for failure forces obtained in the experiment by means of three basic analytic and numerical methods. Stress and strain states were compared, indicating the highest consistency for the value of normal peel stresses acting in the direction perpendicular to the direction of the joint tension. Reduced stresses provided by the analyses reached values higher than those which were achieved during the specimen tension testing.

Numerical simulation of the welding process for the prediction of temperature distribution on Al/steel explosion welded joint

“…Each of these methods has disadvantages, threaded and riveted connections introduce local stress concentrations [1]. Adhesive joints are characterized by lower strength and lower resistance to environmental conditions [2]. Sometimes two connection methods are used simultaneously.…”

“…Examples include riveting and adhesive bonding. Thanks to adhesive bonding, the impact of local stress concentrations at the rivets is minimized, resulting in greater strength of the connection [1], [2].…”

Fatigue Analysis of Welded Joints Using a Thin-Walled Al/Fe Explosive Welded Transition Joints

“…In the case of adhesive bonding, the problem is the strength and durability of the joint, especially in the case of a small joining surface [ 2 ]. When joining materials using friction welding, it is difficult to obtain large-surface joints in the form of sandwich sheets [ 3 ]. A much more efficient method of obtaining sandwich sheets is explosion welding.…”