Journal
COMPOSITE STRUCTURES
Volume 108, Issue -, Pages 417-422Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2013.09.046
Keywords
Fatigue crack length; Carbon nanotubes; Crack detection; Adhesive joint; Single-lap joint
Categories
Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education [2012-048078]
- Ministry of Trade, Industry Energy (MOTIV)
- Korea Institute for Advancement of Technology(KIAT)
- Dongnam Institute for Regional Program Evaluation through the Leading Industry Development for Economic Region
- National Research Foundation of Korea [2009-0094014, 21A20131712492] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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For a composite material having a high specific strength and specific stiffness with excellent damping and good impact properties, joint design is a very important consideration because an improper design may lead to overweight or defective structures. Adhesive bonding does not require holes and distributes the load over a larger area than mechanical joints. As the use of adhesively bonded joints subjected to cyclic loading has increased in recent years, it is important to measure and improve the fatigue cracking and the lifetime of these adhesive joints. In this paper, the static and dynamic strengths of adhesive joints incorporating carbon nanotubes were compared to those of adhesive joints without carbon nanotubes. Composite to aluminum single-lap joints were fabricated and their strengths were evaluated. From the tests, fatigue strengths of the adhesive joints increased when the adhesive of the adhesive joint had carbon nanotubes although their static strengths decreased. Also, crack initiation and propagation can be effectively detected by measuring the variation of equivalent resistance when carbon nanotubes are dispersed into the adhesive in the adhesive joint. (C) 2013 Elsevier Ltd. All rights reserved.
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