Strength and fracture characteristics of shear adhesive dissimilar joint
Date
2012-02-27Author
Mohd Afendi
Imaduddin Helmi, Wan Nordin
Ruslizam, Daud
Teramoto, Tokuo
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Show full item recordAbstract
In this study, the effect of bond thickness upon the
shear strength of epoxy adhesively bonded joint with dissimilar
adherends is addressed. The bond thickness, t between the
adherends is controlled to be ranged from 0.1 mm to 1.2 mm.
Finite element analyses are also executed by ANSYS 11 code to
investigate the stress distributions withiin the adhesive layer of
adhesive joint. As a result, shear strength of adhesive joint
reduces with increasing bond thickness. The strength of shear
adhesive joint is also dependent on elastic modulus of adherend.
Moreover, the failure of dissimilar adherends bonded shear joint
originated at a location with critical stress-y which is the
interface corner of ALYH75/epoxy. In the case of shear adhesive
joint with an interface crack, the fracture also occurred at the
ALYH75/epoxy interface even in the SEA specimens. Fracture
toughness, Jc of AES is close to those of SES and demonstrates
strong dependency upon bond thickness. Furthermore, the
interface crack in SEA specimen has relatively large fracture
resistance if compared to those in AES specimen. Finally, Kc
fracture criterion is found to be appropriate for shear adhesive
joints which fracture adhesively.