Adherend thickness effect on the tensile fracture toughness of a structural adhesive using an optical data acquisition method

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

Authors

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

Journal

Title: International Journal of Adhesion and Adhesives

Vol. 53

Pages: 15-22

ISSN: 0143-7496

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 24 Citations

Scopus - 31 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-009-HMJ

DOI: 10.1016/j.ijadhadh.2014.01.015

Abstract (EN): Adhesive bonding is nowadays a serious candidate to replace methods such as fastening or riveting, because of attractive mechanical properties. As a result, adhesives are being increasingly used in industries such as the automotive, aerospace and construction. Thus, it is highly important to predict the strength of bonded joints to assess the feasibility of joining during the fabrication process of components (e.g. due to complex geometries) or for repairing purposes. This work studies the tensile behaviour of adhesive joints between aluminium adherends considering different values of adherend thickness (h) and the double-cantilever beam (DCB) test. The experimental work consists of the definition of the tensile fracture toughness (G(IC)) for the different joint configurations. A conventional fracture characterization method was used, together with J-integral approach, that take into account the plasticity effects occurring in the adhesive layer. An optical measurement method is used for the evaluation of crack tip opening and adherends rotation at the crack tip during the test, supported by a Matlab (R) sub-routine for the automated extraction of these quantities. As output of this work, a comparative evaluation between bonded systems with different values of adherend thickness is carried out and complete fracture data is provided in tension for the subsequent strength prediction of joints with identical conditions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8