Introduction To increase electromechanical coupling factor of 1-3 piezoelectric composite and reduce its bending deformation under external stress, an improved 1-3 piezoelectric composite is developed. In the improved structure, both epoxy resin and silicone rubber are used as polymer material. Methods The simulation model of the improved 1-3 piezoelectric composite was established using the finite element software ANSYS. The relationship of the performance of the improved composite to the volume percentage of silicone rubber was determined by harmonic response analysis and the bending deformation under external stress was simulated by static analysis. The improved composite samples were prepared by cutting and filling methods, and the performance was tested. Results The feasibility of the improved structure was verified by finite element simulation and experiment. The electromechanical coupling factor of the improved composite can reach 0.67 and meanwhile the characteristic impedance can decline to 13 MRayl. The electromechanical coupling factor of the improved composite is higher than that of the composite with only epoxy resin as the polymer and the improved composite can reduce bending deformation. Discussion Comparison of simulation and experiment, the results of the experiment are in general agreement with those from the simulation. However, most experimental values were higher than the simulation results, and the abnormality of the test results was also more obvious than that of the simulation. These findings may be attributed to slight difference in the material parameters of simulation and experiment.

中文翻译：

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通过模拟和实验表征改进的 1-3 压电复合材料

引言为了提高1-3压电复合材料的机电耦合系数，减少其在外应力作用下的弯曲变形，研制了一种改进的1-3压电复合材料。在改进的结构中，环氧树脂和硅橡胶均用作聚合物材料。方法采用有限元软件ANSYS建立改进型1-3压电复合材料的仿真模型。通过调和响应分析确定了改进复合材料的性能与硅橡胶体积百分比的关系，并通过静力分析模拟了外应力下的弯曲变形。采用切割和填充的方法制备了改进的复合样品，并进行了性能测试。结果通过有限元仿真和实验验证了改进结构的可行性。改进后的复合材料的机电耦合系数可以达到0.67，同时特性阻抗可以下降到13 MRayl。改进后的复合材料的机电耦合系数高于仅以环氧树脂为聚合物的复合材料，改进后的复合材料可以减少弯曲变形。讨论 仿真与实验对比，实验结果与仿真结果基本一致。但是，大多数实验值都高于模拟结果，并且测试结果的异常也比模拟结果更加明显。