Development of Multifunctional Structural Material Systems by Innovative Design and Processing

Asanuma, Hiroshi; Kunikata, Jun; Kibe, Mitsuhiro

doi:10.1557/proc-1129-v03-06

Cited by 5 publications

(5 citation statements)

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“…At an earthquake, structures are loaded extremely large strain that steel fracture occur (fracture strain of steel: 10% or more), therefore, the poor mechanical properties of the sensors mean they cannot monitor the damage of structures. To overcome this problem, Asanuma et al developed a metal‐core piezoelectric fiber/aluminum composite . This composite is a material in which the metal‐core piezoelectric fiber, produced by extruding lead zirconate titanate (PZT) around a platinum wire by the extrusion method and sintering, is embedded in the aluminum via the interphase forming/bonding method .…”

Section: Introductionmentioning

confidence: 99%

Improvement Estimation Accuracy of Impact Detection Using Metal‐Core Piezoelectric Fiber/Aluminum Composites

et al. 2019

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Metal-core piezoelectric fiber/aluminum composites are promising candidates for use as sensors for structural health monitoring (SHM) systems. These composites exhibit excellent mechanical properties compared with conventional piezoelectric ceramics because the fiber is embedded into the aluminum matrix using the interphase forming/bonding method. Furthermore, it has emerged that the output voltage characteristics of composites show distinct anisotropy. Herein, an impact detection system with more practical estimation accuracy is developed by performing wavelet transformation on the output voltage. To investigate the practicality of the proposed method, the estimation results are compared with the results using the conventional output voltage. By exploiting the anisotropic response, the new system is expected to reduce the number of sensors required compared with conventional systems, while retaining accuracy. The results show that the present system could be applied successfully using models of the output voltage and signals obtained from composites fixed in two different positions. Application of the wavelet transform method to the output voltage reduced the estimation errors in comparison with values estimated directly from the output voltage, with maximum estimation error of 4.38 mm. This accuracy cleared the minimum required accuracy for an SHM system; thus, confirming the validity of this approach.

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Section: Introductionmentioning

confidence: 99%

Improvement Estimation Accuracy of Impact Detection Using Metal‐Core Piezoelectric Fiber/Aluminum Composites

et al. 2019

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“…By embedding the metal-core piezoelectric ceramic fiber (Sato et al, 2003, Qiu et al, 2004, Sato et al, 2004 into aluminum by using the Interphase Forming/Bonding method (Asanuma, 2000), these problems have been solved. An energy-harvesting device and a sensor use these features of the metal-core piezoelectric ceramic fiber/aluminum composite (Askari et al, 2006, Asanuma et al, 2009, Richeson et al, 2010, so it is expected to achieve maintenance-free, long-term performance.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a metal-core piezoelectric ceramics fiber/aluminum composite

Yanaseko

Asanuma

Sato

2015

Mechanical Engineering Journal

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This paper describes the characterization of a metal-core piezoelectric ceramics fiber/aluminum composite as a metal-based piezoelectric composite. Piezoelectric materials, especially piezoelectric ceramics are generally used as excellent transducer materials. However, there are serious disadvantages, as they are very brittle and need a complicated electrode system with an adhesion layer to generate piezoelectricity. Therefore, the application of piezoelectric ceramics is limited. In order to solve these problems, a metal-core piezoelectric ceramics fiber/aluminum composite was developed. The metal-core piezoelectric fiber is not as brittle as bulk ceramics, but it is still too brittle to be embedded in an aluminum matrix using a conventional process. Therefore, the interphase forming/bonding method was applied to embed it in an aluminum matrix without fracture. Using this successful approach, a simple electrode system was formed between the metal core of the embedded fiber and the matrix. As this material system is expected to be used as a robust sensor and energy harvester, its output voltage and power characteristics were evaluated with vibration test equipment and compression vibration equipment. According to the results, the output voltage generated from the specimen is proportional to its strain, and dependent on its direction. It was also found that the output power generated from the specimen increases with the square of its strain, and in proportion to its frequency, and the calculated maximum output power reaches approximately 3.4 mW when the specimen undergoes 0.2 % strain and 600 Hz frequency by vibration. As this output power is generated from the single embedded fiber, it is suggested that the energy for driving a wireless module can be secured by embedding multiple fibers. Consequently, a composite embedded with multiple fibers will be able to be used as a wireless strain sensor owing to its strain measurement and energy-harvesting capabilities.

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“…On the other hand, the applicable scope of the piezoelectric ceramics is limited because of their fragility. To overcome these problems, Asanuma et al embedded platinum-core piezoelectric ceramic fibers [7][8][9][10] in aluminum using the Interphase Forming/Bonding (IF/B) method [11] and fabricated a composite without causing mechanical or electrical damage to the piezoelectric fiber [12][13][14][15][16]. Furthermore, the output voltage characteristics of the fabricated composite were evaluated, and the anisotropy of the output voltage was observed [17].…”

Section: Introductionmentioning

confidence: 99%

Detection of Impact Location by Using Anisotropy of Output Voltage of Metal-Core Piezoelectric Fiber/Aluminum Composites

Yanaseko

Asanuma

Sato

2015

IJMSA

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This paper describes the detection of an impact location by using anisotropy of the output voltage of a metal-core piezoelectric ceramic fiber/aluminum composite. Metal-core piezoelectric ceramic fibers are very fragile. The mechanical properties of metal-core piezoelectric ceramic fibers can be improved by embedding the fibers into the metals that have excellent reliability and strength. Therefore, metal-core piezoelectric ceramic fiber/aluminum composites were developed by using the Interphase Forming/Bonding method. Furthermore, the output voltage characteristics of fabricated a composite were evaluated, and the anisotropy of the output voltage was observed. In this study, the impact location detection system was developed by using the anisotropy of the output voltage of the composite. It is expected to reduce the number of sensors compared with conventional systems while maintaining the accuracy. As a result, the impact location detection was successfully developed by using the model of the output voltage of the composites that were disposed in two different positions to obtain the signals.

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Development of Multifunctional Structural Material Systems by Innovative Design and Processing

Cited by 5 publications

References 0 publications

Improvement Estimation Accuracy of Impact Detection Using Metal‐Core Piezoelectric Fiber/Aluminum Composites

Improvement Estimation Accuracy of Impact Detection Using Metal‐Core Piezoelectric Fiber/Aluminum Composites

Characterization of a metal-core piezoelectric ceramics fiber/aluminum composite

Detection of Impact Location by Using Anisotropy of Output Voltage of Metal-Core Piezoelectric Fiber/Aluminum Composites

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