Bonding at the interface have a greater stress concentration generated discontinuous

Piezoelectric single bimorph drive applications that require a large displacement output, the conventional drive is the one or two piezoelectric layer bonded to a metal formed on the spacer layer. On the one hand, the low adhesion strength of the interface; other hand, since the piezoelectric layer gasket and the different nature of the material, at the interface of the adhesive have a greater stress concentration  air circuit breaker . Bonding stress concentration at the interface and weaken the structure of a piezoelectric single-chip dual-drive cycle of the main excitation are destroyed. In order to improve the life of the bending drive, the drive RAINBOW proposed. By chemical reduction method was prepared under the high   electric transformer    spacer layer, the spacer layer and the piezoelectric layer is made of a combination of chemical methods, at the interface so that a higher strength. However, due to material properties of the stress caused by discontinuity  mcb circuit breaker  situation has not been alleviated. FGM is based on the application requirements, choose from a variety of different properties of the material, the application of advanced composite technology, the material composition and structure of the middle part was a continuous gradient.