Piezoresistive Sensing of Strain and Damage in Carbon/Epoxy Rectangular and I-shaped Cross-section Beams in Flexure

dc.creatorJ.B. Pinto
dc.creatorJosé de Jesús Ku Herrera
dc.creatorS. Kern
dc.creatorValeria La Saponara
dc.creatorFRANCIS AVILES CETINA
dc.date2014
dc.date.accessioned2023-07-21T19:18:54Z
dc.date.available2023-07-21T19:18:54Z
dc.identifierhttp://cicy.repositorioinstitucional.mx/jspui/handle/1003/1669
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7737228
dc.descriptionThe strain and damage sensing capabilities of a carbon fiber/epoxy composite subjectedto monotonic and incremental cyclic flexural loading is investigated using theelectrical resistance approach. The piezoresistive sensitivity of the carbon fiber/epoxycomposites were first characterized using rectangular cross-section specimens andthen application of the electrical resistance approach was extended to an I-shapedcross-section laminated composite. The change in the electrical resistance of the specimenswas simultaneously monitored on both the tensile and compressive sides whilethe specimens were tested under flexural loading. On the tensile side, the positive electricalresistance change (ΔR) showed a linear trend for small deformations (less than0.3% strain) and increased in a nonlinear fashion for larger deformations. In contrast tothe tensile side, ΔR on the compressive side showed a nonlinear and non-monotonicbehavior. Initially, ΔR decreased for low values of deformation (less than 0.3% strain),leveled off at the onset of the specimen’s compressive failure, and then increased upto complete failure. Correlations between abrupt changes in ΔR and indications ofcomposite damage are confirmed with scanning electron microscopy. Carbon fibersin both rectangular and I-shaped cross-section carbon/epoxy specimens are capableof sensing tensile and compressive strain, and adequately capture the onset and progressionof failure by fiber micro-buckling, formation of kink bands, and delamination.The cross-section properties (e.g. stiffness and layup sequence) affect the piezoresistiveand damage sensitivity, with the stiffer I-shaped cross-section being less sensitiveto ΔR than standard specimens of rectangular cross-section. ΔR under cyclic flexuralloading for both tensile and compressive sides showed a permanent change with applieddeformation after each cycle, indicating first the release of residual stresses andthen damage.
dc.formatapplication/pdf
dc.languageeng
dc.relationinfo:eu-repo/semantics/datasetDOI/10.12783/issn.2168-4286/2.4/Pinto
dc.relationcitation:Pinto, B., Ku-Herrera, J. J., Kern, S., La Saponara, V., & Avilés, F. (2014). Piezoresistive sensing of strain and damage in carbon/epoxy rectangular and I-shaped cross-section beams in flexure. Journal of Multifunctional Composites, 2(4), 183-194.
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceJournal of Multifunctional Composites. 2. 183-194, 2014
dc.subjectinfo:eu-repo/classification/Autores/CARBON FIBER
dc.subjectinfo:eu-repo/classification/Autores/I-BEAM
dc.subjectinfo:eu-repo/classification/Autores/PIEZORESISTIVITY
dc.subjectinfo:eu-repo/classification/Autores/FLEXURAL LOADING
dc.subjectinfo:eu-repo/classification/cti/7
dc.subjectinfo:eu-repo/classification/cti/33
dc.subjectinfo:eu-repo/classification/cti/3312
dc.subjectinfo:eu-repo/classification/cti/331208
dc.subjectinfo:eu-repo/classification/cti/331208
dc.titlePiezoresistive Sensing of Strain and Damage in Carbon/Epoxy Rectangular and I-shaped Cross-section Beams in Flexure
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


Este ítem pertenece a la siguiente institución