Effect of adhesive type and thickness on the lap shear strength

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Lucas F M da Silva (Author) FEUP; Rodrigues, TNSS (Author) Other; Figueiredo, MAV (Author) FEUP; de Moura, MFSF (Author) FEUP; Chousal, JAG (Author) FEUP

Journal

Title: Journal of Adhesion

Vol. 82

Pages: 1091-1115

ISSN: 0021-8464

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 386 Citations

Scopus - 433 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-004-GAJ

DOI: 10.1080/00218460600948511

Abstract (EN): The effect of the adhesive thickness on the bond strength of single-lap adhesive joints is still not perfectly understood. The classical elastic analyses predict that the strength increases with the adhesive thickness, whereas experimental results show the opposite. Various theories have been proposed to explain this discrepancy, but more experimental tests are necessary to understand all the variables. The objective of the present study was to assess the effect of the adhesive thickness on the strength of single-lap joints for different kinds of adhesives. Three different adhesives were selected and tested in bulk. The strain to failure in tension ranged from 1.3% for the most brittle adhesive to 44% for the most ductile adhesive. The adherend selected was a high-strength steel to keep the adherends in the elastic range and simplify the analysis. Three thicknesses were studied for each adhesive: 0.2, 0.5, and 1 mm. A statistical analysis of the experimental results shows that the lap shear strength increases as the bondline gets thinner and the adhesive gets tougher.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 25