Study on Mechanical-Electrical Response Characteristics of 2-2 Cement-Based Piezoelectric Composites

Pengju Feng, Wen-jie Cheng, Teng Wang, Jiang-ying Chen
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引用次数: 1

Abstract

2-2 cement-based piezoelectric composites were prepared by cutting-casting method. The effects of different loading amplitudes and frequencies on the mechanical-electrical response characteristics of 2-2 cement-based piezoelectric composites were studied by a material testing machine (MTS810). The research shows that the samples have better frequency response under quasi-static loading; the output electrical signal has a good linear relationship with the loading amplitude. The effect of different loading strain rates on the mechanical-electrical response characteristics of 2-2 cement-based piezoelectric composites was studied by a split Hopkinson pressure bar (SHPB) test device. The present work shows that under single impact loading, with loading strain rate increasing, the output electric displacement increases accordingly. When the strain rate reaches 258s-1, the output electric displacement does not increase substantially and remains unchanged. Within a certain range, 2-2 cement-based piezoelectric composites have linear characteristics and frequency response characteristics, which provide an important reference for sensor fabrication.
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2-2水泥基压电复合材料的机电响应特性研究
采用切削-浇铸法制备了2-2水泥基压电复合材料。利用MTS810材料试验机研究了不同加载幅度和频率对2-2水泥基压电复合材料机电响应特性的影响。研究表明,试样在准静态加载下具有较好的频率响应;输出电信号与加载幅度呈良好的线性关系。采用分离式霍普金森压杆(SHPB)试验装置,研究了不同加载应变率对2-2水泥基压电复合材料机电响应特性的影响。研究表明,在单次冲击加载下,随着加载应变率的增大,输出电位移也相应增大。当应变速率达到258s-1时,输出电位移没有明显增加,保持不变。在一定范围内,2-2水泥基压电复合材料具有线性特性和频响特性,为传感器的制作提供了重要参考。
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