Effect of Temperature on Tensile Strength and Mode I Fracture Toughness of a High Temperature Epoxy Adhesive

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Banea, MD (Autor) FEUP; da Silva, LFM (Autor) FEUP; Campilho, RDSG (Autor) Outra

Revista

Título: Journal of Adhesion Science and Technology

Vol. 26

Páginas: 939-953

ISSN: 0169-4243

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 96 Citações

Scopus - 105 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: P-002-FBE

DOI: 10.1163/156856111x593649

Abstract (EN): There has been a growing requirement in the last years, particularly in the aerospace industry, for adhesives to withstand high temperatures. The most important factor to consider when studying the effect of temperature on adhesively-bonded joints is the variation of adhesive mechanical properties with temperature such as the stress-strain curve and the toughness. Adhesive strength and strain show temperature dependence, especially near the glass transition temperature (T-g) of the adhesive. Similarly, the fracture toughness is expected to show temperature dependence. In this work, an experimental study was performed to evaluate the effect of the temperature on the adhesive strength and fracture toughness of a high temperature epoxy adhesive. Bulk specimens of cured adhesive were produced and tested in tension at room temperature (RT), 100, 150 and 200 degrees C, in order to obtain a strength profile of the adhesive over this temperature range. Results showed that as the temperature increases the adhesive tensile strength reduces but the ductility increases. Pure mode I adhesive fracture toughness (G(Ic)) tests were performed on double cantilever beam (DCB) specimens at room (RT) and high temperatures (100, 150 and 200 degrees C) and the fracture toughness G(Ic) as a function of temperature was obtained. It is shown that at temperatures below T-g, the fracture toughness, G(Ic), is relatively insensitive to temperature, while above T-g (at 200 degrees C) a drastic decrease in fracture toughness was observed. (C) Koninklijke Brill NV, Leiden, 2012

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 15