Wang Yinli, Yanaseko Tetsuro, Kurita Hiroki, Sato Hiroshi, Asanuma Hiroshi, Narita Fumio
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan.
Department of Mechanical Engineering, Kogakuin University, Tokyo 192-0015, Japan.
Sensors (Basel). 2020 Oct 13;20(20):5799. doi: 10.3390/s20205799.
It is well known that the curing residual stress induced during a fabrication process has a great influence on the performance of piezoelectric composite devices. The purpose of this work was to evaluate the residual thermal stress of lead zirconate titanate piezoelectric fiber aluminum (Al) matrix (piezoelectric fiber/Al) composites generated during fabrication and to understand the effect of the residual thermal stress on the electromechanical response. The three-dimensional finite element method was employed, and the residual stress generated during the solidification process of the Al matrix was calculated. The output voltage was also calculated in the analysis when putting stresses on the composite materials in the length direction of the piezoelectric fiber. It was shown that the cooling from higher temperatures increases the electromechanical conversion capability. Furthermore, we also performed the simulation, and we recorded the output voltage under concentrated load to investigate its application as a load position detection sensor, and we also discussed the influence of the position by changing the modeling with a different fiber position in the Al. The residual stress of hot press molded piezoelectric fiber/Al composite was then measured, and the comparison was made with the calculated values. The simulation results revealed that our model predictions reproduced and explained the experimental observations of curing residual stress. After this study, similar models of composite materials can be analyzed by this simulation, and the result can be used to design piezoelectric composite materials.
众所周知，制造过程中产生的固化残余应力对压电复合器件的性能有很大影响。这项工作的目的是评估锆钛酸铅压电纤维铝（Al）基（压电纤维/Al）复合材料在制造过程中产生的残余热应力，并了解残余热应力对机电响应的影响。采用三维有限元方法，计算了Al基体凝固过程中产生的残余应力。在沿压电纤维长度方向对复合材料施加应力的分析中，还计算了输出电压。结果表明，从较高温度冷却会提高机电转换能力。此外，我们还进行了模拟，记录了集中载荷下的输出电压，以研究其作为载荷位置检测传感器的应用，并且通过改变Al中不同纤维位置的建模来讨论位置的影响。然后测量了热压成型压电纤维/Al复合材料的残余应力，并与计算值进行了比较。模拟结果表明，我们的模型预测再现并解释了固化残余应力的实验观察结果。经过这项研究，类似的复合材料模型可以通过这种模拟进行分析，结果可用于设计压电复合材料。
