Experimental Research on Degradation of Adhesively Bonded Box Beam under Cyclic Torsional Loads

• Published in: Applied Mechanics and Materials Vol. 268-270; pp. 1212 - 1219
• Main Authors: Zhang, Jing Fen, Feng, Qing, Hornung, Martin, Becher, Juergen
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 01.01.2013
• Subjects: Degradation; Structural Adhesive; Cyclic Loading; Fatigue; Energy Absorption; Box Beam
• ISBN: 9783037855799; 3037855797
• ISSN: 1660-9336; 1662-7482; 1662-7482
• DOI: 10.4028/www.scientific.net/AMM.268-270.1212

Structural adhesively bonded and spot welded structures in a car body will experience cyclic loading resulting in degradation, especially in energy absorption performance of welded terms. This paper is focused on the degradation of adhesively bonded and weld-bonded box beams versus equivalent spot welded samples. In the first part of this paper, results from the experimental testing of box beams with different joint methods under cyclic torque are presented. The torsional stiffness of box beams is shown to degrade and box beams with different joint methods show different performance. In the second part, 3-point bending crash test results show the different performance of energy absorption with different joint methods. Bonded and weld-bonded box beams with toughened structural adhesive maintain energy absorption performance compared to the original level, while spot welded profiles show a significant decrease.