Investigation of Electrical Resistance Characteristics of Carbon Fiber Cement Composite Subject to Stress and Strain
Date Issued
2011
Date
2011
Author(s)
Lin, Jing-Chun
Abstract
This paper discusses the intelligent material with the CFRC force corresponding to the resistance produces a linear change, and possessed the ability to measure strain felt, can be applied to the future of research in structural monitoring. CFRC resistance measurements carried out, the internal current-current instability in the initial stage, this time conducted by the force resistance measurement error will be larger, if the application rate to do a linear change in resistance measurements to determine, there will be more clearly The measurement rules, then the force phase, Wei body internally generated micro-cracks, the generation of carbon fiber and mortar bonding force, resulting in resistance changes CFRC - The linear relationship between strain in the damage phase, the resistance changes there will be a jump point, give early warning of the failure mechanism, structure monitoring and early warning to whether to produce cracks and damage. Resistance to change by CFRC and the circumstances of structural cracks, the sensors, actuators, and information integration, three functions in one, into the intelligent smart CFRC paste materials (smart material), the future will strain paste sensor combination in structure to achieve cost advantages with trading volume and thus achieve the seismic testing, prevention and monitoring of results.
In order to establish CFRC basic mechanical behavior, in order to facilitate subsequent analysis and practical application, this study conducted two major mechanical behavior Wei test: compressive Wei inspection, direct pull Wei inspection, and was conducted Wei inspection process of measuring its resistance changes, and Wei inspection process of the phenomenon to be explored, on the one hand the establishment of its basic nature, the other hand, verify the correctness of the previous theoretical model, looking forward to the follow-up used in the actual structure of the measurement.
The results showed that: the ratio of this study can be made of carbon fiber distributed evenly, and only need 0.2% vol. Rate can add carbon fiber to reduce resistivity targets. By the compressive test results can be found in Wei, material changes in the resistance when the pressure is obvious, the maximum period of 28 days of age up to about 15% of base resistance, and the Gauge factor will increase with rising age, which represents the material will rise with age and increase the perception of strain sensitivity, this study shows that the cement substrate to RPC can indeed improve the electrical conductivity, different from the literature used by the general mortar.
Subjects
carbon fiber
electrical fractional change
dispersion
methylcellulose
Type
thesis
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