Mode I fracture toughness of adhesively bonded joints as a function of temperature: Experimental and numerical study

• Type: Article in International Scientific Journal
• Date: 2011

Authors

da silva, lfm (Author) FEUP; banea, md (Author) FEUP; campilho, rdsg (Author) FADEUP

Journal

Title: International Journal of Adhesion and Adhesives

Vol. 31

Pages: 273-279

ISSN: 0143-7496

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 54 Citations

Scopus - 81 Citations

Scientific classification

FOS: Engineering and technology

Other information

Authenticus ID: P-002-Q4H

DOI: 10.1016/j.ijadhadh.2010.09.005

Abstract (EN): Adhesives used in structural high temperature aerospace applications must operate in extreme environments. They need to exhibit high-temperature capabilities in order to maintain their mechanical properties and their structural integrity at the intended service temperature. One of the main problems caused by high temperature conditions is the fact that the adhesives have different mechanical properties with temperature. As is known, adhesive strength generally shows temperature dependence. Similarly, the fracture toughness is expected to show temperature dependence. In this work, the Double Cantilever Beam (DCB) test is analysed in order to evaluate the effect of the temperature on the adhesive model fracture toughness of a high temperature epoxy adhesive. Cohesive zone models, in which the failure behaviour is expressed by a bilinear traction-separation law, have been used to define the adhesive behaviour and to predict the adhesive P-delta curves as a function of temperature. The simulation response for various temperatures matched the experimental results very well. The sensitivity of the various cohesive zone parameters in predicting the overall mechanical response as a function of temperature was examined as well for a deeper understanding of this predictive method. Also, issues of mesh sensitivity were explored to ensure that the results obtained were mesh independent.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7