Open Access
Detection of Spatially Distributed Damage in Fiber-Reinforced Polymer Composites.
Timothy W. R. Briggs,Greg O'Bryan,Jack L. Skinner,Bryan R. Loyola,Kenneth J. Loh,Valeria La Saponara,Luciana Arronche +6 more
TLDR
In this article, a method of embedded damage detection within glass fiber-reinforced polymer composites is described by monitoring the spatially distributed electrical conductivity of a strain-sensitive multiwalled carbon nanotube thin film.Abstract:
This work describes a novel method of embedded damage detection within glass fiber–reinforced polymer composites. Damage detection is achieved by monitoring the spatially distributed electrical conductivity of a strain-sensitive multiwalled carbon nanotube thin film. First, thin films were spray-deposited directly upon glass fiber mats. Second, using electrical impedance tomography, the spatial conductivity distribution of the thin film was determined before and after damage-inducing events. The resolution of the sensor was determined by drilling progressively larger holes in the center of the composite specimens, and the corresponding electrical impedance tomography response was measured by recording the current–voltage data at the periphery of the monitored composite sample. In addition, the sensitivity to damage occurring at different locations in the composite was also investigated by comparing electrical impedance tomography spatial conductivity maps obtained for specimens with sets of holes drilled at different locations in the sensing area. Finally, the location and severity of damage from low-velocity impact events were detected using the electrical impedance tomography method. The work presented in this study indicates a paradigm shift in the available possibilities for structural health monitoring of fiber-reinforced polymer composites.read more
Citations
More filters
Journal ArticleDOI
The use of carbon nanotubes for damage sensing and structural health monitoring in laminated composites: a review
TL;DR: In this paper, the use of carbon nanotubes (CNTs) in fiber-reinforced composites for structural health monitoring (SHM) has been investigated.
Journal ArticleDOI
Self-sensing concrete enabled by nano-engineered cement–aggregate interfaces
TL;DR: In this paper, a multifunctional cement composite that could not only bear loads but also possessed electromechanical properties that are sensitive to damage was designed, and the objective of the study was to design a composite composite that was robust to damage.
Journal ArticleDOI
Damage detection and conductivity evolution in carbon nanofiber epoxy via electrical impedance tomography
TL;DR: In this article, the authors used electrical impedance tomography (EIT) for damage detection by identifying conductivity changes and by imaging conductivity evolution in a carbon nanofiber (CNF) filled epoxy composite.
Journal ArticleDOI
Damage detection via electrical impedance tomography in glass fiber/epoxy laminates with carbon black filler
TL;DR: In this paper, the state-of-the-art performance of electrical impedance tomography for damage detection in glass fiber/epoxy laminates with carbon black nanocomposite matrices is characterized by identifying a lower threshold of through-hole detection.
Journal ArticleDOI
Tactile imaging and distributed strain sensing in highly flexible carbon nanofiber/polyurethane nanocomposites
TL;DR: In this article, the influence of filler volume fraction on microscale morphology, piezoresistive response while bonded to mechanically loaded substrates, and sensitivity to distributed strain was investigated for tactile imaging and distributed strain sensing via electrical impedance tomography.
References
More filters
Journal ArticleDOI
Reversible water-solubilization of single-walled carbon nanotubes by polymer wrapping
Michael J. O'Connell,Peter J. Boul,Lars M. Ericson,Chad B. Huffman,YuHuang Wang,Erik H. Haroz,Cynthia Kuper,Jim Tour,Kevin D. Ausman,Richard E. Smalley +9 more
TL;DR: In this paper, a general thermodynamic drive for this wrapping is discussed, wherein the polymer disrupts both the hydrophobic interface with water and the smooth tube-tube interactions in aggregates.
Journal ArticleDOI
Ultra-low electrical percolation threshold in carbon-nanotube-epoxy composites
TL;DR: The experimental percolation threshold for the aligned carbon nanotubes used in this paper represents the lowest threshold observed for carbon-nanotube-based polymer composites yet reported.
Journal ArticleDOI
Reversible electromechanical characteristics of carbon nanotubes under local-probe manipulation
Thomas W. Tombler,Chongwu Zhou,Leo Alexseyev,Jing Kong,Hongjie Dai,Lei Liu,Chakram Jayanthi,Meijie Tang,S. Y. Wu +8 more
TL;DR: Experimental and theoretical elucidation of the electromechanical characteristics of individual single-walled carbonnanotubes (SWNTs) under local-probe manipulation are reported and it is revealed that the conductance of an SWNT sample can be reduced by two orders of magnitude when deformed by an AFM tip.
Journal ArticleDOI
On an inverse boundary value problem
TL;DR: A. P. Calderon as discussed by the authors published by the Brazilian Mathematical Society (SBM) in ATAS of SBM (Rio de Janeiro), pp. 65-73, 1980.