1. Fracture mechanics approach to stress singularity in adhesive joints.
- Author
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Dionísio, J. M. M., Ramalho, L. D. C., Sánchez-Arce, I. J., Campilho, R. D. S. G., and Belinha, J.
- Subjects
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ADHESIVE joints , *STRAINS & stresses (Mechanics) , *FRACTURE mechanics , *ADHESIVES - Abstract
Adhesives offer significant advantages when joining materials since they do not create discontinuities in the material, unlike bolting or riveting. Another interest of adhesive joints is the possibility of joining different materials and the lower weight. The analysis of the stress singularity in adhesive joints can provide a better understanding of joint behaviour, and it is mesh independent. The ISSF is based on a fracture mechanics concept, the Stress Intensity Factor (SIF). However, generally, the SIF is only applicable to cracks in a single material, while the ISSF is applicable to multi-material corners and does not require a crack. This work aims to study the stress singularity of aluminium adhesive joints bonded with a brittle adhesive with four different overlap lengths (LO) by determining the singularity's exponents and its intensity. A method for joint strength prediction using the ISSF is also proposed. Additionally, the interface corner's stress is studied, with the different singularity components presented separately to assess their influence on the overall stress. These predictions are also compared with the experimental strength to verify this strength prediction criterion's accuracy when applied to brittle adhesives. In conclusion, the ISSF criterion provides accurate results and can be utilised for further studies in this area. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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