三维编织压电陶瓷基复合材料有效电弹性性能有限元分析

发布时间：2018-08-08 13:56

【摘要】：基于三维编织预制件的细观结构,建立了三维编织压电陶瓷基复合材料位移-电耦合场有限元模型,利用电弹性场体积平均思想和有限元方法研究了周期分布三维编织压电陶瓷基复合材料的有效电弹性性能。通过对代表性体积单元施加位移载荷和电载荷边界条件,预测了不同纤维体积分数下三维编织压电陶瓷基复合材料的有效弹性常数、压电常数和介电常数。计算结果表明,三维编织压电陶瓷基复合材料可显著改善压电陶瓷的整体力学性能,且保持了较好的电学性能。
[Abstract]:Based on the micro structure of three dimensional braided prefabricated parts, a finite element model of displacement electric coupling field of three dimensional braided piezoelectric ceramic matrix composites is established. The effective electroelastic properties of periodic distributed three dimensional braided piezoelectric ceramic matrix composites were studied by means of volume averaging of electroelastic field and finite element method. The effective elastic constant, piezoelectric constant and dielectric constant of 3D braided piezoelectric ceramic matrix composites with different fiber volume fraction were predicted by applying displacement load and electric load boundary condition to the representative volume element. The results show that the three-dimensional braided piezoelectric ceramic matrix composites can significantly improve the overall mechanical properties of piezoelectric ceramics and maintain good electrical properties.
【作者单位】：齐鲁工业大学机械与汽车工程学院;
【基金】：国家自然科学基金项目(11271234)
【分类号】：TB332

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