Real-timein situsensing of damage evolution in advanced fiber composites using carbon nanotube networks
- 23 April 2008
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 19 (21), 215713
- https://doi.org/10.1088/0957-4484/19/21/215713
Abstract
Developments in producing nanostructured materials with novel properties have opened up new opportunities in which unique functionality can be added to existing material systems. As advanced fiber composites are utilized more frequently in primary structural applications there is a key challenge to enhance the performance and reliability while reducing maintenance. As a consequence there is tremendous scientific and technical interest in the development of techniques for monitoring the health of composite structures where real-time sensing can provide information on the state of microstructural damage. In this research we utilize electrically conductive networks of carbon nanotubes as in situ sensors for detecting damage accumulation during cyclic loading of advanced fiber composites. Here we show that, by combining load and strain measurements in real-time with direct current electrical resistance measurements of the carbon nanotube network, insight can be gained toward the evolution and accumulation of damage. The resistance/strain relations show substantial hysteresis due to the formation and opening/closing of cracks during cyclic loading. Through interpreting the resistance response curves we identify a parameter that may be utilized as a quantitative measure of damage.Keywords
This publication has 22 references indexed in Scilit:
- The Bulk Piezoresistive Characteristics of Carbon Nanotube Composites for Strain Sensing of StructuresJournal of Nanoscience and Nanotechnology, 2007
- Spatial conductivity mapping of carbon nanotube composite thin films by electrical impedance tomography for sensing applicationsNanotechnology, 2007
- Elastomeric carbon nanotube circuits for local strain sensingApplied Physics Letters, 2006
- Carbon Nanotube/Polycarbonate Composites as Multifunctional Strain SensorsJournal of Nanoscience and Nanotechnology, 2006
- Nanocomposites in contextComposites Science and Technology, 2005
- Nanotube film based on single-wall carbon nanotubes for strain sensingNanotechnology, 2004
- Fatique and damage-tolerance analysis of composite laminates: Stiffness loss, damage-modelling, and life predictionComposites Science and Technology, 1994
- Microstructural Design of Fiber CompositesPublished by Cambridge University Press (CUP) ,1992
- Fatigue Damage Evaluation through Stiffness Measurements in Boron-Epoxy LaminatesJournal of Composite Materials, 1981
- Fatigue Behavior of Composite LaminateJournal of Composite Materials, 1976