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Analysis of the nonlinear behavior of adhesives in bonded assemblies - Comparison of TAST and Arcan tests ArchiMer
Cognard, J; Creac' Hcadec, R; Sohier, L; Davies, Peter.
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...
Tipo: Text Palavras-chave: Adhesive testing; Mechanical properties of adhesives; Stress distribution; Epoxy/epoxides.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4646.pdf
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