Effect of manufacturing methods on the shear strength of composite single-lap bonded joints

• Published in: Composite structures 2010-08, Vol.92 (9), p.2194-2202
• Main Authors: Song, Min-Gyu, Kweon, Jin-Hwe, Choi, Jin-Ho, Byun, Jai-Hyun, Song, Min-Hwan, Shin, Sang-Joon, Lee, Tae-Joo
• Format: Article
• Language: English
• Subjects: Co-bonding; Cocuring; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Fracture mechanics (crack, fatigue, damage...); Fundamental areas of phenomenology (including applications); Inelasticity (thermoplasticity, viscoplasticity...); Manufacturing method; Mechanical and acoustical properties; Physical properties of thin films, nonelectronic; Physics; Secondary bonding; Solid mechanics; Structural and continuum mechanics; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
• ISSN: 0263-8223; 1879-1085
• DOI: 10.1016/j.compstruct.2009.08.041

The present paper experimentally addresses the effect of manufacturing methods on the strength of composite bonded joints. A total of 391 specimens, manufactured by four different fabrication methods, were tested. For each method, various overlap lengths, adherend thicknesses and lay-up patterns were examined. The failure strength was higher in thicker adherend joints and lower in specimens with larger overlap length. Results showed that the secondary bonded joints had higher strength than the co-bonded and adhesively cocured joints and yielded similar strength compared with the non-adhesive cocured case. Changes in the stacking sequence also affected the interlaminar stresses and failure loads.