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Associate Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates

Alma Mater:The Hong Kong Polytechnic University
Degree:Doctoral Degree
School/Department:Dalian University of Technology,China
Discipline:Computational Mechanics. Aerospace Mechanics and Engineering. Flight Vehicle Design. Materials Physics and Chemistry. Polymer Materials
Business Address:411A, No.1 integrated experimental building, Dalian University of Technology, China
Contact Information:xuhao@dlut.edu.cn
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Current position: Home >> Scientific Research >> Paper Publications

Broadband dynamic responses of flexible carbon black/poly (vinylidene fluoride) nanocomposites: A sensitivity study

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Indexed by:期刊论文

Date of Publication:2017-09-08


Included Journals:SCIE、EI、Scopus


Page Number:246-253

ISSN No.:0266-3538

Key Words:Nanocomposites; Dynamic strains; Sensing precision; Spectrum analysis; Damage detection

Abstract:Nanocomposites fabricated based on a compound of carbon nanofiller and polymer matrix exhibit extraordinary piezoresistive performance, and the capacity of nanocomposite sensors in measuring structural dynamic strains has been widely demonstrated. However, the sensitivity of existing nano composite strain sensors is limited, particularly in aspects of sensing precision and response frequency. This study focuses on sensitivity investigations of flexible nanocomposite sensors fabricated using a compound of carbon black (CB) fillers and polyvinylidene fluoride (PVDF) matrix, which has shown promising potential in perceiving extremely weak strain signals within a considerably broad range of response frequencies.
   As a highly important indication of sensitivity, sensing precision was characterized in a quantitative manner. Broadband spectrum analysis was conducted as an effective way to examine sensor performance in perceiving minimal disturbances in dynamic strains. Disturbances were generated in two experiments, by introducing local material and geometric variations into the inspected structures, in terms of mass attachment and structural damage. The effectiveness of the nanocomposites in structural damage detection was demonstrated. Moreover, the experimental results indicate the promising potential of nanocomposite-based strain sensors for applications such as advanced bioelectronics, ultrasonic inspection, and in-situ structural health monitoring.(C) 2017 Published by Elsevier Ltd.