期刊
APPLIED SCIENCES-BASEL
卷 11, 期 24, 页码 -出版社
MDPI
DOI: 10.3390/app112411925
关键词
electro-mechanical response; cement-based piezoelectric composites; impact loading; sensitivity
类别
资金
- Natural Science Foundation of China [11572163, 11832013]
- Ningbo Rail Transit [JS-00-SG-17003]
The study demonstrates that cement-based 1-3 and 2-2 piezoelectric composites exhibit strain rate effects under both quasi-static and dynamic loading, with a non-linear mutation point in sensitivity. The 2-2 composite shows a larger linear range compared to the 1-3 composite, making it advantageous for sensor applications.
By employing ordinary Portland cement as a matrix and PZT-5H piezoelectric ceramic as the functional body, 1-3 and 2-2 cement-based piezoelectric composites were prepared. Quasi-static compression tests were performed along with dynamic impact loading tests to study the electro-mechanical response characteristics of 1-3 and 2-2 cement-based piezoelectric composites. The research results show that both composites exhibit strain rate effects under quasi-static compression and dynamic impact loading since they are strain-rate sensitive materials. The sensitivity of the two composites has a non-linear mutation point: in the quasi-static state, the sensitivity of 1-3 and 2-2 composites is 157 and 169 pC/N, respectively; in the dynamic state, the respective sensitivity is 323 and 296 pC/N. Although the sensitivity difference is not significant, the linear range of the 2-2 composite is 24.8% and 61.3% larger than that of the 1-3 composite under quasi-static compression and dynamic impact loading, respectively. Accordingly, the 2-2 composite exhibits certain advantages as a sensor material, irrespective of whether it is subjected to quasi-static or dynamic loading.
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