Temperature Dependence of the Fracture Toughness of Adhesively Bonded Joints

• Type: Article in International Scientific Journal
• Date: 2010

Authors

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

Journal

Title: Journal of Adhesion Science and Technology

Vol. 24 No. 8

Pages: 2011-2026

ISSN: 0169-4243

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 53 Citations

Scopus - 73 Citations

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: P-003-BH2

DOI: 10.1163/016942410x507713

Abstract (EN): Adhesives used in structural high temperature space and 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 class of the adhesives which are able to withstand the temperature extremes that are experienced in the space environment and are able to maintain a good degree of flexibility at very low temperatures are the room temperature vulcanizing (RTV) silicone adhesives. As is known, adhesive strength generally shows temperature dependence. Similarly, the fracture toughness is expected to show temperature dependence. In this study, the pure mode I fracture toughness for adhesive joints bonded with a high temperature RTV silicone adhesive was measured over a wide range of temperatures. Double cantilever beam (DCB) tests were performed on specimens at room temperature (RT), 100 and 200 degrees C. Mode I traction-separation laws were obtained as a function of temperature, directly from the experiments, by differentiation of simultaneously measured data (the J-integral and the end-opening displacement). Results showed that the fracture toughness, the peak cohesive stress and the respective end-opening displacement all decreased with the temperature rise. (C) Koninklijke Brill NV, Leiden, 2010

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16