An active-passive nonlinear finite element model for electromechanical composite morphing beams

Raul B. Olympio, Mauricio V. Donadon, Saullo G.P. Castro

Research output: Contribution to conferenceAbstractScientific

Abstract

The use of morphing structures aims to increase aerodynamic efficiency, decreasing fuel consumption and aircraft overall weight. Within this context, piezoelectric materials are of great interest in the design of smart structures because the piezoelectric effect is reversible, allowing them to work both as sensors and as actuators. The present work proposes a geometrically nonlinear finite element formulation for composite beams with embedded piezoelectric layers for application in morphing aerostructures. The formulation uses the complete Green strain tensor to account for geometric nonlinearities, and linear piezoelectricity to model the electromechanical behavior. A set of nonlinear equilibrium equations results from the application of variational principles, and is finally solved by means of an iterative-incremental arc length method. The sensitivity of the element to stacking sequence and number of actuators are investigated.

Original languageEnglish
Number of pages1
Publication statusPublished - 2018
Externally publishedYes
Event31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018 - Belo Horizonte, Brazil
Duration: 9 Sep 201814 Sep 2018

Conference

Conference31st Congress of the International Council of the Aeronautical Sciences, ICAS 2018
CountryBrazil
CityBelo Horizonte
Period9/09/1814/09/18

Keywords

  • Composite
  • Finite element model
  • Morphing
  • Nonlinear
  • Piezoelectric

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