A finite element model for the analysis of 3D axisymmetric laminated shells with piezoelectric sensors and actuators: Bending and free vibrations

Structural health monitoring (SHM) is an inevitable component of modern civil and aerospace structures. It essentially detects the damages in the system by evaluating the performance parameters by the integration of sensing and possibly also actuation devices into the structure. In this paper damage detection process in an aluminium cantilever plate using piezoelectric sensors and actuators is simulated. Possible root damage such as transverse crack and longitudinal crack are studied. The results are compared with undamaged case. The plate is actuated using PZT actuators and performance is evaluated using PVDF sensors. Modelling for PZT/PVDF and structural parts are carried out using coupled field finite element PLANE223 ofAnsys(TM) finite element package. Strain response at the root of the cantilever plate is captured as the voltage output of the PVDF sensor. Strain response is directly related to the voltage generated in the PVDF sensor. The percentage variation of the fundamental frequency is found to be less than 3% in the present study and hence it is not taken as an index of damage. The transient voltage response captured with the transient coupled field analysis shows variation up to 24% as a signature between damaged and undamaged systems. Therefore, the present study suggests transient response evaluation using PVDF sensor is a suitable evaluation technique for the cases under consideration.

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FEM Analysis of a Cantilever Sandwich Beam with MR Fluid Based on ANSYS

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.208.63 ◽

2013 ◽

Vol 208 ◽

pp. 63-69 ◽

Cited By ~ 6

Author(s):

Mateusz Romaszko ◽

Marcin Węgrzynowski

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Fluid Layer ◽

Sandwich Beam ◽

Fem Analysis ◽

Element Model ◽

Free Vibrations ◽

Mr Fluid ◽

Computation Data ◽

Good Agreement

The study covers the modeling three-layered beam incorporating a magnetorheological (MR) fluid. The beam finite element model was created using the ANSYS software. The beam comprises two outer layers made of aluminium and MR fluid layer in between, sealed with silicone rubber. Interactions of the magnetic field are taken into account by varying the parameters of the finite elements. Data required for identification were collected from results of measurement of the beams free vibrations. The identification procedure assumes the good agreement between the frequencies of the beams free vibrations and dimensionless damping coefficients obtained from research and computation data. The validity of proposed beams finite element model was also investigated. Finally some numerical results were presented.

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Finite Element Modelling of Piezoelectric Sensors for Damage Identification in Composite Panels

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.385-387.885 ◽

2008 ◽

Vol 385-387 ◽

pp. 885-888

Author(s):

M.H. Aliabadi ◽

A. Apicella ◽

Albert Sanqirgo-Rodriguez

Keyword(s):

Finite Element ◽

Health Monitoring ◽

Finite Element Modelling ◽

Damage Identification ◽

Piezoelectric Sensors ◽

Composite Panels ◽

The Finite Element Method ◽

Detection Capability ◽

Sensors And Actuators ◽

Piezoelectric Sensors And Actuators

In this paper the application of the finite element method is presented to modeling piezoelectric sensors and actuators for use in structural health monitoring of composite panels. It this demonstrated that FEM can be used to simulate sensorised composite panels and investigate the damage detection capability of sensors.

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