Adhesive Selection for Single Lap Bonded Joints: Experimentation and Advanced Techniques for Strength Prediction

• Type: Article in International Scientific Journal
• Date: 2015

Authors

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

Journal

Title: Journal of Adhesion

Vol. 91

Pages: 841-862

ISSN: 0021-8464

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 38 Citations

Scopus - 73 Citations

Other information

Authenticus ID: P-00G-DFR

DOI: 10.1080/00218464.2014.994703

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 (R) AV138) to less strong and ductile (e.g., Araldite (R) 2015). A new family of polyurethane adhesives combines high strength and ductility (e.g., Sikaforce (R) 7888). In this work, the performance of the three above-mentioned adhesives was tested in single lap joints with varying values of overlap length (L-O). The experimental work carried out is accompanied by a detailed numerical analysis by finite elements, either based on cohesive zone models (CZM) or the extended finite element method (XFEM). This procedure enabled detailing the performance of these predictive techniques applied to bonded joints. Moreover, it was possible to evaluate which family of adhesives is more suited for each joint geometry. CZM revealed to be 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 22