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Piezoelectric d_(15) shear response-based torsion actuation mechanism:an experimental benchmark and its 3D finite element simulation

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International Journal of Smart and Nano Materials 2010年第3期1卷 224-235页

作者： pelin berik Ayech Benjeddou Institute of Technical Mechanics Johannes Kepler University of LinzLinzAustria Institut Supérieur de Mécanique de Paris(Supméca) ParisFrance

An experimental benchmark is proposed for piezoelectric,direct-torsion actuation using mono-morph piezoceramic d_(15)shear *** is reached by designing and assembling an adaptive plate having two identical composite faces sandwiching a core made of connected six oppositely polarized(OP)piezoceramic d15 shear patches along the *** electronic speckle pattern interferometry system was used to measure the static tip deflection of the adaptive sandwich composite plate that was mounted in a cantilever configuration and actuated in torsion by progressively applied voltages on the piezoceramic shear core electroded major ***,the effective rate of twist was post-processed and proposed as an evaluation criterion for smart composites under piezoelectric torsion *** verification of the experimental results,the proposed experimental benchmark was simulated using three-dimensional piezoelectric finite elements(FE)within ABAQUS®commercial *** comparison of the obtained experimental and simulation results showed reasonable agreement,but the slight nonlinear experimental response was not confirmed by the linear FE *** experimentally proved torsion actuation mechanism,produced by OP piezoceramic d15 shear patches,can be applied actively to prevent torsion in many applications,such as in wind turbines,helicopter blades,robot arms,flexible space structures,etc.

关键词： torsion actuation shear-mode piezoceramic benchmark experiment simulation

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Static experimentations of the piezoceramic d_(15)-shear actuation mechanism for sandwich structures with opposite or same poled patches-assembled core and composite faces

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International Journal of Smart and Nano Materials 2011年第4期2卷 230-244页

作者： pelin berik Ayech Benjeddou Institute of Technical Mechanics Johannes Kepler University of LinzLinzAustria Institut Supérieur de Mécanique de Paris(Supméca) ParisFrance

Static d_(15)-shear actuated smart composites consisting of glass fiber/epoxy layers sandwiching piezoceramic shear patches-assembled cores were investigated experimentally and *** piezoceramic cores were formed by connecting two or three patches with the same or opposite polarization *** each cantilevered benchmark the shear-induced transverse tip deflection,under increasing actuation voltage,ranging from 61.5 V to 198 V,was measured by an electronic speckle pattern interferometer *** performance of the shear actuated smart composites was characterized by their shear-induced transverse deflection per length per *** was found that this performance is much better at high voltages for which the response becomes *** verification of the experimental results the proposed benchmarks were simulated within ABAQUS®commercial code using three-dimensional piezoelectric finite *** comparison of the obtained experimental and simulation results show a nonlinear dependence of the transverse deflection for voltages higher than around 92 V.

关键词： piezoceramic d_(15)-shear static actuation smart composite

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Piezoelectric d_(15) shear-response-based torsion actuation mechanism:An exact 3D Saint-Venant type solution

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International Journal of Smart and Nano Materials 2012年第2期3卷 82-102页

作者： Michael Krommer pelin berik Yury Vetyukov Ayech Benjeddou Institute for Technical Mechanics Johannes Kepler University LinzAltenbergerstr.69A-4040 LinzAustria Linz Center of Mechatronics GmbH Altenbergerstr.69A-4040 LinzAustria SUPMECA Structures3 rue Fernand Hainaut-93407 Saint Ouen CEDEXFrance

This paper is concerned with the detailed analysis of the behavior of a piezoceramic bi-morph torsion actuator using the d_(15)-*** bi-morph actuator is made of two oppositely polarized adjacent piezoceramic prismatic *** mathematical analysis is based on the Saint-Venant torsion theory;a formulation of the electromechanically coupled problem in terms of a stress function and of the electric potential is derived,which represents an exact solution of a specific three-dimensional problem;in particular,for the case when the axial stress and the axial component of the electric displacement vector are independent of the axial *** resulting boundary-value problem in the cross-section is solved using the method of finite *** for the actuated rate of twist are presented and compared to three-dimensional electromechanically coupled finite element solutions using ABAQUS®for the case of a cantilevered bi-morph actuator.A very good agreement is found.

关键词： piezoelectric d_(15)-effect bi-morph torsion actuator exact Saint-Venanttype solution numerical validation

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