Development of carbon nanotube-based sensor to monitor crack growth in cracked aluminum structures underneath composite patching
Olson, Timothy M.
Kwon, Young W.
Didoszak, Jarema M.
MetadataShow full item record
This paper presents the design of a carbon nanotube-based sensor to detect crack propagation in aluminum structures underneath composite patching. Initial tests are utilized to determine the correct procedure and materials to properly fabricate a carbon nanotube (CNT) sensor, which is then placed in between a composite patch and the aluminum structure. CNTs have been utilized as sensors in previous studies but only for sensing crack propagation within the composite itself. This study focuses on crack propagation in the base material and is not concerned with the composite. In this application, the composite is only a patch and can be replaced if damaged. This study utilizes both tension and fatigue testing to determine the usefulness of the CNT sensor. The CNT sensor is shown to be effective in giving an indication of the crack propagation in the aluminum. Correlation is done between the propagation length and the increase in resistance in the CNT sensor for tensile testing as the crack width is large enough to obtain an appreciable resistance change.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Mercado, Ervin N. (Monterey, California: Naval Postgraduate School, 2015-06);This thesis focuses on testing the feasibility of using carbon nanofiber foams as strain gauge material to detect crack propagation in aluminum structures. We produced the tridimensional carbon nanofiber foams using a ...
Moberg, Michael J. (Monterey, California. Naval Postgraduate School, 2012-06);The objective of this research was to generate shock-resistant materials based on inorganic fullerene type tungsten disulfide (IF-WS2) and carbon nanocomposite structures for personal protection armor systems. The aim was ...
Conner, Ryan P. (Monterey, California. Naval Postgraduate School, 2012-06);In this study composite materials were tested in different fluid environments to determine the role of Fluid Structure Interaction with these composites under a lower velocity impact. The purpose of this research is to ...