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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Campilho, RDSG (Autor) Outra; Fernandes, TAB (Autor) Outra; Banea, MD (Autor) Outra; Silva, LFMD (Autor) FEUP

Revista

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

Vol. 25

ISSN: 1221-4639

Editora: Galati University Press

Indexação

ISI Web of Knowledge

Scopus - 6 Citações

Outras Informações

ID Authenticus: 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

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 1