Comparative evaluation of bonded, welded and weldbonded structural joints

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Campilho, RDSG (Author) Other; Banea, MD (Author) FEUP; da Silva, LFM (Author) FEUP

Journal

Title: Annals of "Dunarea de Jos" University of Galati, Fascicle XII, Welding Equipment and Technology

Vol. 22

Pages: 5-12

ISSN: 1221-4639

Publisher: Galati University Press

Indexing

ISI Web of Knowledge

Scopus - 0 Citations

Other information

Authenticus ID: P-008-3C8

Abstract (EN): A variety of methods to join structural components is available nowadays. Joining with high-strength adhesives is presently widespread for advanced structures such as aerospace or aeronautical, on account of a few distinctive advantages over traditional methods (elimination of drilling operations and distribution of loads over a larger area than mechanical joints). Nonetheless, stress concentrations emerge at the overlap ends because of the adherends straining and load asymmetry, which can result on premature fractures. Structural joints can equally be severely affected by the surface treatment of the bonding surfaces, extreme environmental conditions and ageing. Weld-bonded joints (combination of adhesive bonding with spot-welding) can surpass these disadvantages, adding a superior static strength and stiffness, and higher peeling and fatigue strength. This work presents and experimental and numerical study comparing hybrid spot-welded/bonded single-lap joints with purely spot-welded and bonded joints. The Finite Element Method (FEM) and Cohesive Zone Models (CZM's) for damage growth were tested in Abaqus® to evaluate this technique for strength prediction. Strength improvements up to 58% compared to spot-welded joints and 24% over bonded joints were achieved by this hybrid method, with accurate FEM estimations. © Galati University Press, 2011.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8