Cohesive Zone and Extended Finite Element modelling for bonded joint strength prediction

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Campilho, RDSG (Author) Other; Fernandes, TAB (Author) Other; Banea, MD (Author) Other; Silva, LFMD (Author) FEUP

Journal

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

Vol. 25

ISSN: 1221-4639

Publisher: Galati University Press

Indexing

ISI Web of Knowledge

Scopus - 6 Citations

Other information

Authenticus ID: P-00A-408

Abstract (EN): The integrity of multi-component structures is usually determined by their unions. Adhesive-bonding is often used over traditional methods because of the reduction of stress concentrations, reduced weight penalty and easy manufacturing. Commercial adhesives range from strong and brittle (e.g., Araldite® AV138) to less strong and ductile (e.g., Araldite® 2015). A new family of polyurethanes combines high strength and ductility (e.g., Sikaforce® 7888). Different overlap lengths (LO) give rise to distinct stress states in the adhesive layer. In this work, the performance of the above mentioned adhesives was tested in single-lap joints with varying values of LO. The experimental work carried out is accompanied by a detailed numerical analysis by Cohesive Zone Models (CZM) or the eXtended Finite Element Method (XFEM). CZM was highly accurate, except for largely ductile adhesives, although this could be circumvented with a different cohesive law. XFEM is not the most suited technique for mixed-mode damage growth, but a rough prediction was achieved. © Galati University Press, 2014

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 1