Monitoring concept for structural integration of PZT-fiber arrays in metal sheets: a numerical and experimental study

Abstract

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.

Smart structures, materials and nano technology in engineering

“…The present IJSNM special issue spans volume 9's issue 1 [1][2][3][4] and issue 2 [5][6][7][8]; it contains 8 papers [1][2][3][4][5][6][7][8] that were extended and revised (some of them twice) according to 3 anonymous and independent peer reviewers' reports. They were spontaneously submitted following an open call to the participants of the joint 8th SMART and 6th SMN held in Madrid (Spain) from 5 to 8 June 2017.…”

“…It was closed by a technical visit to a 'design and manufacturing of aero-structures and components' supplier of renowned international (multi-national) aircraft manufacturers. Hereafter are briefly described the 8 papers of the present IJSNM special issue spanning volume 9's issue 1 [1][2][3][4] and issue 2 [5][6][7][8].…”

“…The second one [2], presented in 'MS05: Multifunctional structures with integrated piezoelectric elements', introduces the Ritz sub-laminate generalized unified formulation approach for piezoelectric composite plates. The third contribution [3], presented in 'SS: CRC/TR 39 PT-PIESA project' on lightweight design by integrating functions addresses, numerically and experimentally, the monitoring concept for structural integration of PZT fibre arrays in metal sheets. The fourth contribution [4] is a focused review on the less known and investigated research topic of field-dependent nonlinear piezoelectricity.…”

“…As a closure, we are very thankful to the authors for their very interesting contributions and to the reviewers for their meticulous reports. Besides, the organizers of SMART and SMN 2017 are very thankful to the editor-in-chief, Professor Jinsong Leng, and to the publisher, Sage Publications, for their supports to these events by dedicating the present special issue (spanning volume 9's issue 1 [1][2][3][4] and issue 2 [5][6][7][8]) to sample contributions from those presented therein and by publishing it in open access format with weaved Articles Processing Charges (APC).…”

In-Process Monitoring of Joining Operations for Piezoceramic Elements

“…To ensure a sensing signal and to prevent a destruction of the brittle active piezoceramic elements, the forming process is monitored by the inherent sensor function of the PZT fibers. The concept of inherent sensing of the preload was already demonstrated with single PZT fibers in previous investigations [4]. On this basis, the research in the electromechanical behavior of several parallel switched fibers is the subject matter of the paper.…”