基于有限元法压电纤维复合物结构的模拟优化

中国有色金属学报, 2012, 22(6): 1747-1753.

基于有限元法压电纤维复合物结构的模拟优化

林秀娟 ^1, , 张斗 ^2, , 张晓泳 ^3, , 李志友 ^4, , 周科朝 ^5,

1.中南大学粉末冶金国家重点实验室,长沙410083

2.中南大学粉末冶金国家重点实验室,长沙410083

3.中南大学粉末冶金国家重点实验室,长沙410083

4.中南大学粉末冶金国家重点实验室,长沙410083

5.中南大学粉末冶金国家重点实验室,长沙410083

基金项目: 国家自然科学基金资助项目(51072235) 中央高校基本科研业务费前沿研究计划(2010QZZD013) 湖南省自然科学基金杰出青年资助项目(11JJ1008)

关键词：压电纤维复合物 , 有限元法 , 电极结构 , 压电陶瓷纤维

Modeling and optimization of piezoelectric fiber composites based on finite element method

利用有限元软件ANSYS模拟分析电极结构、压电陶瓷纤维厚度及体积分数等结构参数对纤维内部电场分布及复合物驱动应变性能的影响规律.结果表明:具有交叉指形电极结构的压电纤维复合物在纤维内部存在不均匀电场区域,其强度和体积分数共同制约着复合物的驱动应变性能.在恒定电场条件下,当交叉指形电极宽度为纤维厚度的一半时,复合物具有最大应变量；厚度较小的压电陶瓷纤维内部的均匀电场强度较高和体积分数较大,进而有利于提高复合物的驱动应变性能.在恒定电压条件下,电极指间距越大,复合物的驱动应变量越小.当指间距和指宽的比＞10时,应变量可达到理想状态的90％.压电陶瓷纤维体积分数越高的复合物越容易获得较大的驱动应变性能.

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