Design, development and the analysis of d31-mode and d33-mode multilayered surface bondable piezoelectric actuators, for actuation of large and stiff structures

Shivashankar, P and Kumar, S and Gopalakrishnan, S (2020) Design, development and the analysis of d31-mode and d33-mode multilayered surface bondable piezoelectric actuators, for actuation of large and stiff structures. In: AIAA Scitech 2020 Forum, 6 - 10 January 2020, Orlando.

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Abstract

In this work, an overall analysis of the two new —the d31-mode based and the d33-mode based— surface bondable multilayer piezoelectric ceramic actuators are presented. This covers the design of the actuators, the path that lead to their development, the methodology of their actuation, their relative performance (against each other, and against a similar sized piezoelectric patch), and the overall effectiveness of each of them. As the name suggests, the former actuator is designed to utilize the “31” electromechanical coupling in the piezoelectric material, while the latter one exploits “33” electromechanical coupling. The d33-mode surface bondable multilayer actuator (MLA) was designed for the actuation of large and stiff structures; typically for structures for which piezoelectric patches are ill-suited, from both the actuation level standpoint and from the ease of implementation standpoint. The design of this actuator is based on the regular piezoelectric stack design, and consequently delivers the same levels of actuation as that of a piezoelectric patch at very low excitation voltages. This is possible because the layers of the d33-mode surface bondable MLA are thinner than the thickness of a similar patch, and hence develop similar fields at lower voltages. This often leads to the assumption that more number of thinner layers would be of greater benefit —which is not the case, and the reason for this forms a part of the paper. Alternatively, the patches can also be modified according to the stack design, to offer an actuator which has many thinner layers of piezoelectric patches —the d31-mode surface bondable MLA. Even for this actuator, there is the same conception that multiple thinner layers would offer larger levels of actuation for a given input electrical energy, but, this too is not the case. In the paper, first, the actuation concept of these two actuators are elaborated with experimental demonstrations, and later a look at the impedance of the MLA is offered to debunk the above mentioned notion. Finally, based on these two analyses, along with the input from the category of ease of implementation and handling, the best choice among the three designs —the patches, the d33-mode surface bondable MLA, and the d31-mode surface bondable MLA— is decided.

Item Type:	Conference Paper
Publication:	AIAA Scitech 2020 Forum
Publisher:	American Institute of Aeronautics and Astronautics Inc, AIAA
Additional Information:	The copyright for this article belongs to American Institute of Aeronautics and Astronautics Inc, AIAA.
Keywords:	Aviation; Electromechanical coupling; Multilayers; Piezoelectric ceramics; Piezoelectric materials; Piezoelectricity, Excitation voltage; Experimental demonstrations; Multilayer actuators; Multilayer piezoelectric ceramics; Overall effectiveness; Piezoelectric patch; Piezoelectric stack; Relative performance, Piezoelectric actuators
Department/Centre:	Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	07 Feb 2023 11:04
Last Modified:	07 Feb 2023 11:04
URI:	https://eprints.iisc.ac.in/id/eprint/80022

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