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Abstract
A strain gauge technique recently developed with the wedge test, for estimating crack length and, thus, the fracture energy of structural adhesive bonding, has been employed on a system in which one adherend had two types of surface treatment. Simple polishing and polishing with subsequent sandblasting were the treatments used, with a distinct straight line, perpendicular to the sample edges, separating the two. Despite the clear-cut difference in surface treatment, smooth transitions in crack growth speed were noted. This can be explained by the existence of a curved crack front, encroaching gradually on one surface-treated zone, whilst remaining partially on the other. Crack length, a, vs. time, t, curves were exploited to obtain fracture energy vs. crack speed. The multi-valued nature of the relation can also be explained by a non-rectilinear fracture front. The method is proposed as a method for reproducible comparison of surface treatments.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
JOURNAL OF ADHESION
no. 85,
pages 736 - 754,
ISSN: 0021-8464 - Language:
- English
- Publication year:
- 2009
- Bibliographic description:
- Budzik M., Jumel J., Imielińska K., Shanahan M.: Fracture in composite/aluminium joints of variable adhesive properties// JOURNAL OF ADHESION. -Vol. 85, iss. 10 (2009), s.736-754
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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