Design of intelligent materials with self-diagnosing function for preventing fatal fracture

Muto, Norio; Yanagida, Hiroaki; Nakatsuji, Teruyuki; Sugita, Minoru; Ohtsuka, Yasushi; Arai, Yasuhiro

doi:10.1088/0964-1726/1/4/007

Cited by 60 publications

(24 citation statements)

References 2 publications

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“…Schulte's group has reported that measuring changes in electrical resistance of carbon fiber-reinforced plastic composites during tensile and fatigue loading can be used as a nondestructive evaluation technique [10,11]. The same idea was used to detect the water leakage in reinforced concrete, in which the cement mortar conductivity decreased with decreasing water content and leakage [12].…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes grown on glass fiber as a strain sensor for real time structural health monitoring

Boehle

Jiang

et al. 2012

International Journal of Smart and Nano Materials

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In order to more effectively monitor the health of composite structures, a fuzzy fiber sensor has been developed. The fuzzy fiber is a bundle of glass fibers with carbon nanotubes or nanofibers (CNTs or CNFs) grown on the surface. The nanotube coating makes the fiber bundle conductive while the small conductive path increases sensitivity. The fuzzy fiber sensor can replace conventional metal foil strain gauges in composite applications. The electrical response of the sensor is monitored in real time to measure strain, vibration, cracking and delamination. Continuous monitoring provides instant notification of any problems. Implementation of this sensor network in a composite can increase service life, decrease maintenance costs and greatly reduce inspection downtime.

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Section: Introductionmentioning

confidence: 99%

Carbon nanotubes grown on glass fiber as a strain sensor for real time structural health monitoring

Boehle

Jiang

et al. 2012

International Journal of Smart and Nano Materials

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“…The idea of fabricating self-sensing cementitious materials through the addition of suitable particles into traditional admixtures dates back to the early 90's [11]. Since then, literature comprised several studies devoted to cement-based materials mix with carbon bers [12], nano-carbon black [13] and, more recently, carbon nanotubes [14,15].…”

Section: Carbon Nanotube Cement-based Sensormentioning

confidence: 99%

Novel nanocomposite technologies for dynamic monitoring of structures: a comparison between cement-based embeddable and soft elastomeric surface sensors

Ubertini

Laflamme

Ceylan

et al. 2014

Smart Mater. Struct.

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The authors have recently developed two novel solutions for strain sensing using nanocomposite materials. While they both aim at providing cost-effective solutions for the monitoring of local information on largescale structures, the technologies are different in their applications and physical principles. One sensor is made of a cementitious material, which could make it suitable for embedding within the core of concrete structures prior to casting, and is a resistor, consisting of a carbon nanotube cement-based transducer. The other sensor can be used to create an external sensing skin and is a capacitor, consisting of a flexible conducting elastomer fabricated from a nanocomposite mix, and deployable in a network setup to cover large structural surfaces. In this paper, we advance the understanding of nanocomposite sensing technologies by investigating the potential of both novel sensors for the dynamic monitoring of civil structures. First, an indepth dynamic characterization of the sensors using a uniaxial test machine is conducted. Second, their performance at dynamic monitoring of a full-scale concrete beam is assessed, and compared against off-theshelf accelerometers. Experimental results show that both novel technologies compare well against mature sensors at vibration-based structural health monitoring, showing the promise of nanocomposite technologies for the monitoring of large-scale structural systems. The authors have recently developed two novel solutions for strain sensing using nanocomposite materials. While they both aim at providing cost-eective solutions at monitoring local information on large-scale structures, both technologies are dierent in their applications and physical principles. One sensor is made of a cementitious material, which could make it suitable for embedding within the core of concrete structures prior to casting, and is a resistor, consisting of a carbon nanotube-cement based transducer. The other sensor can be used to create an external sensing skin and is a capacitor, consisting of a exible conducting elastomer fabricated from a nanocomposite mix, and deployable in a network setup to cover large structural surfaces. In this paper, we advance the understanding of nanocomposite sensing technologies by investigating the potential of both novel sensors at dynamic monitoring of civil structures. First, an in-depth dynamic characterization of the sensors using a uniaxial test machine is conducted. Second, their performance at dynamic monitoring of a full-scale concrete beam is assessed, and compared against othe-shelf accelerometers. Experimental results show that both novel technologies compare well against mature sensors at vibration-based structural health monitoring, showing the promise of nanocomposite technologies at monitoring large-scale structural systems.

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“…• Use of excavated materials: Near-site use of excavated materials to make optimal use of natural resources with minimal transportation cost. • Support system: Low cost short-term tunnel support; selfdiagnostic liner segments; self-healing materials (Muto et al, 1992); flexible lining system to accommodate settlements without losing structural capability or allow water to flow.…”

Section: Enhanced Use Of Underground Spacementioning

confidence: 99%

Sustainable development and energy geotechnology — Potential roles for geotechnical engineering

et al. 2011

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The world is facing unprecedented challenges related to energy resources, global climate change, material use, and waste generation. Failure to address these challenges will inhibit the growth of the developing world and will negatively impact the standard of living and security of future generations in all nations. The solutions to these challenges will require multidisciplinary research across the social and physical sciences and engineering. Although perhaps not always recognized, geotechnical engineering expertise is critical to the solution of many energy and sustainability-related problems. Hence, geotechnical engineers and academicians have opportunity and responsibility to contribute to the solution of these worldwide problems. Research will need to be extended to non-standard issues such as thermal properties of soils; sediment and rock response to extreme conditions and at very long time scales; coupled hydro-chemo-thermo-bio-mechanical processes; positive feedback systems; the development of discontinuities; biological modification of soil properties; spatial variability; and emergent phenomena. Clearly, the challenges facing geotechnical engineering in the future will require a much broader knowledge base than our traditional educational programs provide. The geotechnical engineering curricula, from undergraduate education through continuing professional education, must address the changing needs of a profession that will increasingly be engaged in alternative/renewable energy production; energy efficiency; sustainable design, enhanced and more efficient use of natural resources, waste management, and underground utilization.

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Design of intelligent materials with self-diagnosing function for preventing fatal fracture

Cited by 60 publications

References 2 publications

Carbon nanotubes grown on glass fiber as a strain sensor for real time structural health monitoring

Carbon nanotubes grown on glass fiber as a strain sensor for real time structural health monitoring

Novel nanocomposite technologies for dynamic monitoring of structures: a comparison between cement-based embeddable and soft elastomeric surface sensors

Sustainable development and energy geotechnology — Potential roles for geotechnical engineering

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