The technique joining by forming allows the structural integration of piezoceramic fibers into locally microstructured metal sheets without any elastic interlayers.A high-volume production of the joining partners caus...The technique joining by forming allows the structural integration of piezoceramic fibers into locally microstructured metal sheets without any elastic interlayers.A high-volume production of the joining partners causes in statistical deviations from the nominal dimensions.A numerical simulation on geometric process sensitivity shows that the deviations have a high significant influence on the resulting fiber stresses after the joining by forming operation and demonstrate the necessity of a monitoring concept.On this basis,the electromechanical behavior of piezoceramic array transducers is investigated experimentally before,during and after the joining process.The piezoceramic array transducer consists of an arrangement of five electrical interconnected piezoceramic fibers.The findings show that the impedance spectrum depends on the fiber stresses and can be used for in-process monitoring during the joining process.Based on the impedance values the preload state of the interconnected piezoceramic fibers can be specifically controlled and a fiber overload.展开更多
基金This work was supported by the Deutsche Forschungsgemeinschaft(DFG)in context of the Collaborative Research Centre/Transregio 39 PT-PIESA,subprojects A02,A03 and B01.
文摘The technique joining by forming allows the structural integration of piezoceramic fibers into locally microstructured metal sheets without any elastic interlayers.A high-volume production of the joining partners causes in statistical deviations from the nominal dimensions.A numerical simulation on geometric process sensitivity shows that the deviations have a high significant influence on the resulting fiber stresses after the joining by forming operation and demonstrate the necessity of a monitoring concept.On this basis,the electromechanical behavior of piezoceramic array transducers is investigated experimentally before,during and after the joining process.The piezoceramic array transducer consists of an arrangement of five electrical interconnected piezoceramic fibers.The findings show that the impedance spectrum depends on the fiber stresses and can be used for in-process monitoring during the joining process.Based on the impedance values the preload state of the interconnected piezoceramic fibers can be specifically controlled and a fiber overload.
