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Advanced modeling of embedded piezo-electric transducers for the health-monitoring of layered structures

International Journal of Smart and Nano Materials 2020年第4期11卷 325-342页

作者： enrico zappino Erasmo Carrera Department of Mechanical and Aerospace Engineering Politecnico di TorinoMul2 Research GroupTorinoItaly

The present paper presents an innovative approach for the numerical modeling of piezo-electric transducers for the health-monitoring of layered *** numerical approach has been developed in the frameworks of the Carrera Unified *** computa-tional tool allows refined numerical models to be derived in a unified and efficient *** use of higher-order models and the cap-ability to connect different kinematic models using the node-depen-dent kinematic approach has led to an efficient modeling technique for global-local *** approach can refine the model only in those regions where it is required,e.g.,the areas where piezo-electric transducers are *** model has been used to study embedded and surface-mounted *** accuracy of the pre-sent model has been verified by comparing the current results with numerical and experimental data from the *** mod-eling solutions have been developed,mixing one-,two-and threedimensional finite *** results show that the use of the present modeling technique allows the computational cost to be reduced with respect to the classical approaches preserving the ccuracy of the results in the critical areas.

关键词： Carrera Unified Formulation Embedded Sensor Health Monitoring Layered Structures Refined models

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Buckling of thin-walled beams by a refined theory

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第10期13卷 747-759页

作者： Syed Muhammad IBRAHIM Erasmo CARRERA Marco PETROLO enrico zappino Specialty Units for Safety and Preservation of Structures King Saud UniversityRiyadhSaudi Arabia Department of Mechanical and Aerospace Engineering Politecnico di TorinoCorso Duca degli Abruzzi 2410129 TorinoItaly

The buckling of thin-walled structures is presented using the 1D finite element based refined beam theory formulation that permits us to obtain N-order expansions for the three displacement fields over the section *** higher-order models are obtained in the framework of the Carrera unified formulation(CUF).CUF is a hierarchical formulation in which the refined models are obtained with no need for ad hoc *** theories are obtained on the basis of Taylor-type and Lagrange polynomial *** of these theories have been carried out by their applications to studies related to the buckling of various beam structures,like the beams with square cross section,I-section,thin rectangular cross section,and annular *** results obtained match very well with those from commercial finite element softwares with a significantly less computational ***,various types of modes like the bending modes,axial modes,torsional modes,and circumferential shell-type modes are observed.

关键词： Unified beam theory Carrera unified formulation(CUF) Buckling 1D formulation

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Effects of Thermo-Mechanical Loads on Aeroelastic Instabilities of Metallic and Composite Panels

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Transactions of Nanjing University of Aeronautics and Astronautics 2014年第2期31卷 118-122页

作者： Erasmo Carrera Maria Cinefra enrico zappino Lorenzo Succi Department of Mechanical and Aerospace Engineering Politecnico di TorinoCorso Duca degli Abruzzi 24 10129 Torino Italy School of Aerospace Mechanical and Manufacturing Engineering RMIT University Melbourne Australia

Panel flutter phenomena can be strongly affected by thermal loads,and so a refined aeroelastic model is ***-order shell theories are used as structural *** aerodynamic forces are described using the Piston *** temperature is considered uniform over the thickness of the *** aero-thermo-elastic model is derived in the framework of the Carrera unified formulation(CUF),therefore the matrices are expressed in a compact form using the″fundamental nuclei″.Composite and sandwich structures are considered and different boundary conditions are taken into *** effects of the thermal load on the aeroelastic behavior are investigated.

关键词： Carrera unified formulation(CUF) panel flutter aeroelasticity aero-thermo-elasticity shell elements

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