Active vibration control of piezoelectric bonded smart structures using PID algorithm

Static and dynamic FE analysis of piezoelectric integrated thin-walled composite structures with large rotations

Piezoelectric materials embedded into plates and shells make the structures being capable of sensing and actuation, usually called smart structures, which are frequently used for shape and vibratio...

A review on modeling techniques of piezoelectric integrated plates and shells

Disturbance rejection control for vibration suppression of piezoelectric laminated thin-walled structures

A geometrically nonlinear large rotation shell theory is proposed for dynamic finite element (FE) analysis of piezoelectric integrated thin-walled smart structures. The large rotation theory, which has six independent kinematic parameters but expressed by five nodal degrees of freedom (DOFs), is based on first-order shear deformation (FOSD) hypothesis. The two-dimensional (2D) FE model is constructed using eight-node quadrilateral shell elements with five mechanical DOFs per node and one electrical DOF per piezoelectric material layer with linear constitutive equations. The linear and nonlinear dynamic responses are determined by the central difference algorithm (CDA) and the Newmark method. The results are compared with those obtained by simplified nonlinear theories, as well as those reported in the literature. It is shown that the present large rotation theory yields considerable improvement if the structures undergo large displacements and rotations.

https://iopscience.iop.org/article/10.1088/0964-1726/22/10/105025/pdf

Large rotation FE transient analysis of piezolaminated thin-walled smart structures

This paper deals with nonlinear finite element analysis of smart structures with integrated piezoelectric layers. Two geometrically nonlinear finite plate elements incorporating piezoelectric layers are applied based either on first- or third-order transverse shear deformation theory. Nonlinear strain-displacement relations are used that are valid for small strains and moderate rotations. Numerical tests are performed for the time histories of the tip displacement and sensor output voltage of a thin beam with a piezoelectric patch bonded to the surface.

Nonlinear Dynamic FE Simulation of Smart Piezolaminated Structures Based on First- and Third-Order Transverse Shear Deformation Theory

Deposition of carbon based materials by magnetron sputtering suffers frequently from the low deposition rate of carbon due to its low sputtering yield. Here, we describe an approach based on the so-called sputtering yield amplification, which significantly increases the sputtering yield. Carbon has been doped by serial co-sputtering with two different elements, namely tungsten and niobium. Both elements provide a significant rate increase. Addition of 3 at.% of Nb increases the deposition rate of carbon by 130%, whereas the same concentration of W increases it by 280%. TRIDYN simulations have been performed, which reproduce the experimental data. Additionally, our experiments find evidence for very long residence times of the dopant in the target as a result of recoil implantation.

Increasing the carbon deposition rate using sputter yield amplification upon serial magnetron co-sputtering

The presented paper focuses on the modeling and finite element simulation of thin composite structures with integrated piezoelectric layers. Geometrically nonlinear piezolaminated finite elements are based on the Reissner-Mindlin or third-order transverse shear deformation hypotheses and the assumptions of small strains but moderate rotations. The numerical results are compared to results in literature. (© 2011 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)

Nonlinear transient FE analysis of piezolaminated smart structures

Institut fur Allgemeine Mechanik, RWTH Aachen, Templergraben 64, 52062 AachenIn this paper, a linear controller based on the Lyapunov stability theorem is designed and implemented on a smart beam. Thissmart beam consists of a steel beam with a piezoactuator bonded to it. The controller is used to attentuate the vibrations ofthe smart beam while exciting it by it’s ﬁrst eigenmode. A super element (SE) model of the same beam is ﬁrstly derived, andthe controller is implemented on the SE and results are shown.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/pamm.201210340

Modelling and control of a smart beam

Nonlinear third-order shear deformation FE simulation of the sensor output voltage of piezolaminated plates Thang Duy Vu, Ruediger Schmidt1 Summary Two geometrically nonlinear finite plate elements incorporating piezoelectric layers are presented, based either on firstor third-order shear deformation theory. Numerical tests are performed for the sensor output voltage of a piezolaminated plate. keywords: Nonlinear FE analysis, piezolaminated plate, third-order shear deformation

Ruediger Schmidt

Papers

Nonlinear Dynamic FE Simulation of Smart Piezolaminated Structures Based on First- and Third-Order Transverse Shear Deformation Theory

Increasing the carbon deposition rate using sputter yield amplification upon serial magnetron co-sputtering

Nonlinear transient FE analysis of piezolaminated smart structures

Modelling and control of a smart beam

Nonlinear third-order shear deformation FE simulation of the sensor output voltage of piezolaminated plates