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Provedor de dados:  ArchiMer
País:  France
Título:  Analysis of the nonlinear behavior of adhesives in bonded assemblies - Comparison of TAST and Arcan tests
Autores:  Cognard, J
Creac' Hcadec, R
Sohier, L
Davies, Peter
Data:  2008-12
Ano:  2008
Palavras-chave:  Adhesive testing
Mechanical properties of adhesives
Stress distribution
Resumo:  This paper describes a study in which the shear behavior of a structural epoxy adhesive has been measured using the standard thick adherend shear test (TAST) specimen and a modified Arcan test A. numerical study of the TAST test taking into account the nonlinear behavior of the adhesive and the finite deformations of the adhesive joint, shows that there is a localization of plastic zones close to the adhesive-substrate interface near the free edge of the adhesive. Experimental tests carried out with steel and aluminum substrates and with various adhesives also show that failure initiates in this region. These edge effects in the TAST fixture can lead to an incorrect analysis of the behavior of the adhesive (for instance, underestimation of the shear stress in the joint at failure) particularly when an adhesive, failure mode is dominating. The modified Arcan fixture provides a more homogeneous stress state. A similar improvement of the TAST fixture is proposed. (c) 2008 Elsevier Ltd. All rights reserved.
Tipo:  Text
Idioma:  Inglês

Editor:  Elsevier
Formato:  application/pdf
Fonte:  International Journal of Adhesion and Adhesives (0143-7496) (Elsevier), 2008-12 , Vol. 28 , N. 8 , P. 393-404
Direitos:  2008 Elsevier Ltd All rights reserved.

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