In situ sensing of impact damage in epoxy/glass fiber composites using percolating carbon nanotube networks

Gao, Limin; Chou, Tsu‐Wei; Thostenson, Erik T.; Zhang, Zuoguang; Coulaud, Magali

doi:10.1016/j.carbon.2011.04.003

Cited by 141 publications

(82 citation statements)

References 12 publications

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“…From these tests, failure strain, tenacity (the failure load normalized by the linear density) and gauge factor (slope of resistance-strain curve) were obtained. With regards to nanomaterial characterization, numerous previous researches [7][8][9][10][11] have shown accumulation of damage in nanomaterials is a multi-step process. To introduce gradual damage in the CNT yarn and to probe the relationship between damage, microstructural change and sensitivity, a stepwise cyclic loading was applied in addition to monotonic loading to failure.…”

Section: Specimen Preparation and Experimental Detailsmentioning

confidence: 99%

“…Most of the research efforts to date have either been directed towards: 1) CNT based elements/patches [6] for external sensing and; 2) CNT based polymer nanocomposites and CNT based composites having CNT networks distributed throughout the bulk of the material [7][8][9][10][11]. In addition to these two well established research areas, more recent studies have been conducted on CNT based yarns [12] and CNT based sheets [13] for strain sensing.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of electro-mechanical behavior of carbon nanotube yarns during tensile loading

Obaid

Heider

Gillespie

2015

Carbon

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Section: Specimen Preparation and Experimental Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of electro-mechanical behavior of carbon nanotube yarns during tensile loading

Obaid

Heider

Gillespie

2015

Carbon

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“…The resistancechange response of ''plain'' CFRP and CFRP with 0.5 wt% CNFs in the seventh cycle were shown in Figure 9(d) and (e). A same analysis by Gao 18 noted that there were three phases of resistance response corresponding to the material damage in loading process, including cracks reopened, elastic deformation of the matrix cracks, and the formation of new cracks. Compared to the ''plain'' CFRP, which can only perceive the fracture of CFs and the decrease in contact points between CFs, the CFRP modified with 0.5 wt% CNFs has the ability to sense the interface damage between CFs and matrix and the formation and development of cracks in matrix.…”

Section: Cnfs/cfrp Laminatesmentioning

confidence: 99%

“…Besides, the micro-cracks were bridged by reinforcements so as to slow down the crack growth. 18 As a conclusion, the interlaminar shear and impact resistance of polymer nano-composites will be bound to increase. 13,[19][20][21][22][23] The presence of conductive particles in matrix improved the electrical conductivity of the material without loss of their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Strain and damage self-sensing properties of carbon nanofibers/carbon fiber–reinforced polymer laminates

Wang

Chang

Chen

2017

Advances in Mechanical Engineering

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Unidirectional fiber-reinforced composites of ''plain'' carbon fiber-reinforced polymer laminates and carbon nanofibers modified carbon fiber-reinforced polymer laminates were prepared based on the manufacture of the epoxy resin modified with various contents of carbon nanofibers. The carbon nanofibers-modified epoxy matrix and carbon fiberreinforced polymer laminates specimens were subject to constant amplitude cyclic tensile loading, quasi-static tension loading, and incremental cyclic tension loading while the values of their electrical resistance were monitored through electrical resistance technique. Resistance-change curves of carbon nanofibers/carbon fiber-reinforced polymer laminates indicated the changes in conductive percolation networks formed by carbon fibers or carbon nanofibers. These changes can identify the complex damage modes and the loss of mechanical integrity in laminates. The changes in resistance of specimens showed a nearly linear correlation with the strain, so the damage process of the carbon fiberreinforced polymer laminates can be self-sensed according to the resistance-change curves. In addition, uniformly dispersed carbon nanofibers formed a network that spans the whole insulation area, which improved their self-sensing property of strain sensitivity without compromising the mechanical properties of the carbon fiber-reinforced polymer laminates. This technology can achieve the quantitative strain and damage self-sensing properties of nano-reinforced composites without any additional sensor, and it is bound to be a promising method for in situ health monitoring.

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“…In fact, various materials such as hydrogen (H 2 ), metal/metal carbide, and DNA [16][17][18][19] have been inserted inside these nanometer-sized tube-like structures. Although a great deal of work has been done with CNT-networks for the in situ sensing of impact damage in composite materials (thanks to their electrical properties) [20], CNTs have not been yet investigated properly and largely as reinforcement for self-healing applications.…”

Section: Introductionmentioning

confidence: 99%

The Self-Healing Capability of Carbon Fibre Composite Structures Subjected to Hypervelocity Impacts Simulating Orbital Space Debris

Aïssa¹,

Tagziria²,

Haddad³

et al. 2012

ISRN Nanomaterials

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The presence in the space of micrometeoroids and orbital debris, particularly in the lower earth orbit, presents a continuous hazard to orbiting satellites, spacecrafts, and the international space station. Space debris includes all nonfunctional, man-made objects and fragments. As the population of debris continues to grow, the probability of collisions that could lead to potential damage will consequently increase. This work addresses a short review of the space debris "challenge" and reports on our recent results obtained on the application of self-healing composite materials on impacted composite structures used in space. Self healing materials were blends of microcapsules containing mainly various combinations of a 5-ethylidene-2-norbornene (5E2N) and dicyclopentadiene (DCPD) monomers, reacted with ruthenium Grubbs' catalyst. The self healing materials were then mixed with a resin epoxy and single-walled carbon nanotubes (SWNTs) using vacuum centrifuging technique. The obtained nanocomposites were infused into the layers of woven carbon fibers reinforced polymer (CFRP). The CFRP specimens were then subjected to hypervelocity impact conditions-prevailing in the space environment-using a home-made implosion-driven hypervelocity launcher. The different self-healing capabilities were determined and the SWNT contribution was discussed with respect to the experimental parameters.

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In situ sensing of impact damage in epoxy/glass fiber composites using percolating carbon nanotube networks

Cited by 141 publications

References 12 publications

Investigation of electro-mechanical behavior of carbon nanotube yarns during tensile loading

Investigation of electro-mechanical behavior of carbon nanotube yarns during tensile loading

Strain and damage self-sensing properties of carbon nanofibers/carbon fiber–reinforced polymer laminates

The Self-Healing Capability of Carbon Fibre Composite Structures Subjected to Hypervelocity Impacts Simulating Orbital Space Debris

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