Electromechanical Response and Residual Thermal Stress of Metal-Core Piezoelectric Fiber /Al Matrix Composites

Abstract

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.

Design and finite element simulation of metal-core piezoelectric fiber/epoxy matrix composites for virus detection

“…For example, polymethyl methacrylate (PMMA) based PZTs flexible composite films have been fabricated by a solvent evaporation technique, and the results showed that the composites are suitable, potential, and functional candidates for energy harvesting applications [ 8 ]. In our previous study, embedding a PZT hollow fiber into an aluminum matrix not only enhanced the mechanical performance, but also improved the piezoelectricity of the PZT composites due to the high residual stresses of the PZT fiber [ 9 ]. Many studies have proved that PZTs are prospective materials for building a dynamic detection system, and FEA is a potential method to further optimize the design of detecting viruses.…”

On the Possibility of Developing Magnetostrictive Fe-Co/Ni Clad Plate with Both Vibration Energy Harvesting and Mass Sensing Elements

“…Piezoelectric ceramics and polymers are expected to exhibit sensing and energy harvesting properties, and many studies have focused on this possibility [ 3 , 4 , 5 , 6 , 7 , 8 ]. In addition, magnetostrictive alloys are considered promising energy harvesting materials [ 9 , 10 ], and hence the development and characterization of such alloys have attracted attention [ 11 , 12 ].…”

Electric polarization and crystal orientation of lead zirconate titanate under mechanical stress due to embedding in a metal matrix

“…These properties are utilized in applications such as impact detection [19] and viscosity sensor [20,21]. The robustness of PZT/Al composites is attributed to the presence of a metal matrix and the extremely high compressive stresses generated during the embedding process [22,23]. These stresses originate from the difference in thermal expansion coefficients of the piezoelectric ceramic fibers and metal.…”

“…Several studies on the application of compressive stress to polarized ceramics have been reported [27][28][29]; however, most of these studies reported the change in piezoelectric properties and polarization under uniaxial compressive stress [30,31]. Few studies have been conducted on the polarization state and the piezoelectric properties under extremely high triaxial stress (about 1 GPa [22,23]), such as the PZT embedded in aluminum.…”