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Reliable method of assessing fracture properties of asymmetric bonded joints

Tysarczyk J., Budzik M., Jumel J., Imielińska K., Shanahan M. M.

Advances in Materials Science

2010

Vol. 10, nr 1(23)

43-52

Two methods of assessing fracture properties of adhesive joints were studied. Two wedge tests: with continuous deflection and with force measurements were compared. Asymmetric geometry of the bonded joint was considered, i.e. two different plates of aluminium alloys: Al-Cu and Al-Mg, were bonded with epoxy DGEBA adhesive. The analytical model is shown to estimate the values of fracture properties: crack position and critical fracture energy. It was found that both methods allow easy and reliable estimation and comparison of fracture properties, although some differences were observed.