DCAMM Seminar - Piezoelectric finite element analysis of smart materials and structures experiments: mathematical, mechanical and technological key issues

A DCAMM seminar will be presented by 

Professor Ayech Benjeddou 1,2

1
Laboratoire ROBERVAL de l’Université de Technologie de Compiègne (UTC) & du Centre National de
la Recherche Scientifique (CNRS), Compiègne, France

2 Institut Supérieur de Mécanique de Paris (SUPMECA), Saint Quen, France



Abstract:

This seminar discusses mathematical, mechanical and technological key issues for performant model/test correlation with smart materials and structures applications. After introducing the piezoelectric mathematical constitutive behaviours, technological dominant response modes resulting from the polarization and electrodes configurations, variational formulations and finite element (FE) discretisations of the electromechanical equations for sensing, actuation and vibration, the through-the-thickness quadratic induced potential (IP) effect and its implementation in common commercial and in-house FE codes are first discussed. Then, the effects of the physical equipotential (EP) mathematical constraints, resulting from piezoelectric patches electrodes, on the correlation with smart structures applications experiments are highlighted. It is shown, in particular, that the technological EP effect is higher than the mathematical IP one. Next, the technological and mechanical issues of series and parallel electric connections according to the polarizations configurations and their FE implementation are illustrated for trimorph (symmetric) smart structures. Some comments on mechanical modelling of unimorph (asymmetric) configurations are also given. Finally, practical FE simulation of the experimentally observed field-dependent nonlinear piezoelectric actuation response is presented for adhesively bonded shear macro-fibre composite patches.

Danish pastry, coffee and tea will be served 15 minutes before the seminar starts.

All interested persons are invited.


Time

Thu 05 Sep 19
15:00 - 16:00

Organizer

Where

Building 414, room 065E
Technical University of Denmark
http://www.dcamm.dk/kalender/2019/09/seminar_no_744??id=8630b26d-2833-4352-8cf6-f64e4cb5dc05
17 APRIL 2021