碳纤维增强水泥压敏效应AC测试方法探讨

Investigation on the Method of AC Measurement of Compression Sensibility of Carbon Fiber Cement

碳纤维增强水泥(CFRC)的导电性与其自身的变形有关,用交流(AC)阻抗测试法,研究了碳纤维增强水泥的压敏效应,并与直流电阻测试法作了比较.结果表明,交流阻抗测试法同样能反映试样受载变形的全过程,而且测试数据更稳定,灵敏度更高,并且从导电机理上进行了分析.

<Abstrcat> The conductibility of carbon fiber reinforced cement(CFRC) is relative to the deformation of itself. An AC impedance technique for measuring compres sion sensibility of CFRC is developed, and compared with the method of DC elect rical resistance measurement. The result shows that AC impedance measur ement may also reflect the whole process of the deformation of the specimen when they are compressed, and the data of measurement is more stable, the sensitivit y is higher. Further more the conducting mechanism is also analyzed.