纤维厚度和体积分数对压电纤维复合物应变性能的影响

doi:10.15541/jim20140565

无机材料学报 ›› 2015, Vol. 30 ›› Issue (6): 571-575.DOI: 10.15541/jim20140565 CSTR: 32189.14.10.15541/jim20140565

纤维厚度和体积分数对压电纤维复合物应变性能的影响

陈子琪¹, 朱松¹, 林秀娟^1,2, 熊威^3,4, 周科朝¹, 张斗¹

(1. 中南大学粉末冶金国家重点实验室, 长沙 410083; 2. 济南大学材料科学与工程学院, 济南 250022; 3. 中南大学材料科学与工程学院, 长沙410083; 4. 伯明翰大学冶金与材料学院, 英国伯明翰B152TT)

收稿日期:2014-11-06 修回日期:2015-01-05 出版日期:2015-06-04 网络出版日期:2015-05-22
作者简介:陈子琪(1990–), 男, 硕士研究生. E-mail: chenziqiqi@126.com
基金资助:
国家自然科学基金(51072235);湖南有色研究基金(YSZN2013CL05);国防基础科研项目(A1420133028)

Effects of Fiber Thickness and Volume Fraction on the Strain Performance of Piezoelectric Fiber Composites

CHEN Zi-Qi¹, ZHU Song¹, LIN Xiu-Juan^1,2, XIONG Wei^3,4, ZHOU Ke-Chao¹, ZHANG Dou¹

(1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China; 2. School of Materials Science and Engineering, Jinan University, Jinan 250022, China; 3. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 4. School of Metallurgy and Materials, University of Birmingham, Birmingham B152TT, UK)

Received:2014-11-06 Revised:2015-01-05 Published:2015-06-04 Online:2015-05-22
About author:CHEN Zi-Qi. E-mail: chenziqiqi@126.com
Supported by:
National Natural Science Foundation of China (51072235);Hunan Nonferrous Research Funding (YSZN2013CL05);Defense Industrial Technology Development Program (A1420133028)

摘要/Abstract

摘要：

实验制备了不同纤维厚度和体积分数的压电纤维复合物, 并在0.1 Hz的激励电压下测试了压电纤维复合物的自由应变性能和驱动性能, 研究复合物典型结构参数对其性能的影响。实验发现, 随着压电纤维厚度增加, 复合物自由应变和顶端位移下降, 1000 V激励电压下, 纤维厚度为200 μm样品纵向自由应变为665 με, 驱动Mylar膜产生的顶端位移为1.9 mm, 而纤维厚度为300 μm和400 μm样品的纵向自由应变仅为纤维厚度为200 μm样品的23.2%和11.7%, 顶端位移为纤维厚度为200 μm样品的45.8%和19.0%。压电纤维复合物具有驱动正交异性, 横向自由应变、纵向自由应变以及横向效应系数随着纤维体积分数的降低而减小, 纤维体积分数为74%的复合物其横向自由应变和纵向自由应变分别为体积分数为59%样品的2.04倍和1.72倍, 横向效应系数也从0.519减小到0.451。

关键词: 压电纤维复合物, 自由应变, 顶端位移, 正交异性

Abstract:

Piezoelectric fiber composite is an emerging smart material and exhibits much broader applications than traditional piezoelectric ceramics, especially in light-weight and curved structures. Piezoelectric fiber composites with different fiber thickness and volume fraction were fabricated. The effects of structural parameters, i.e. different fiber thickness and volume fraction, on the strain properties and actuation performance of piezoelectric fiber composites were investigated at different excitation voltages at frequency of 0.1 Hz. The results indicated that the free strain and tip displacement decreased with the increasing thickness of piezoelectric fiber. When 1000 V voltage was applied, the free strain and tip displacement for the composite with fiber thickness of 200 μm were 665 με and 1.9 mm, respectively, which were much higher than those of composite with fiber thickness of 300 μm or 400 μm. Piezoelectric fiber composites exhibited orthotropic actuation properties, and higher free strains with larger fiber volume fraction. The longitudinal and transverse free strains of composites with 74% fiber volume fraction were 2.04 and 1.72 times magnitudes of composites with 59% fiber volume fraction, respectively. The transverse effect coefficient, the ratio between transverse and longitudinal free strains, decreased from 0.519 to 0.451 when the fiber volume fraction decreased from 74% to 59%.

Key words: piezoelectric fiber composite, free strain, tip displacement, orthotropic properties

中图分类号:

TQ174

陈子琪, 朱松, 林秀娟, 熊威, 周科朝, 张斗. 纤维厚度和体积分数对压电纤维复合物应变性能的影响[J]. 无机材料学报, 2015, 30(6): 571-575.

CHEN Zi-Qi, ZHU Song, LIN Xiu-Juan, XIONG Wei, ZHOU Ke-Chao, ZHANG Dou. Effects of Fiber Thickness and Volume Fraction on the Strain Performance of Piezoelectric Fiber Composites[J]. Journal of Inorganic Materials, 2015, 30(6): 571-575.

图/表 6

图 1 压电纤维复合物结构示意图(a)和压电纤维复合物实物照片(b)

Fig. 1 Schematic structure of piezoelectric fiber composites (a) and sample used in the experiment (b)

图2 位移测试平台示意图

Fig. 2 Schematic diagram of displacement test platform

图3 不同压电纤维厚度的样品纵向自由应变(a)和顶端位移(b)随激励电压的变化

Fig. 3 Voltage amplitude dependence of (a) longitudinal free strain and (b) tip displacement for sample with different thickness of piezoelectric fiber

图4 不同纤维体积分数的压电纤维复合物SEM照片

Fig. 4 SEM micrographs of piezoelectric fiber composites with different volume fractions of piezoelectric fiber (a) 59%; (b) 65%; (c) 74%

图5 不同压电纤维体积分数的样品自由应变随激励电压的变化曲线

Fig. 5 Voltage amplitude dependence of free strain for sample with different volume fractions of piezoelectric fiber

图6 实验测得横向效应系数与混合法则计算结果对比

Fig. 6 Comparison of experimental and mixing rules values of transverse effect coefficient

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纤维厚度和体积分数对压电纤维复合物应变性能的影响

Effects of Fiber Thickness and Volume Fraction on the Strain Performance of Piezoelectric Fiber Composites

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