In this paper, the sensory behaviour of magneto-electro-elastic (MEE) materials is presented under transient mechanical loading using a finite element method. The sensor is bonded on the top surface of a mild steel beam. Numerical results are presented for different sensor locations along the length of a beam, subjected to clamped-free and simply supported boundary conditions. A transient sensory response of PZT-5 and (Terfenol-D)-epoxy mixed components (MSCP) is also studied. Ansys 8.1 is used to validate the sensory response (i.e. displacement and electric potential) of PZT-5 with the computer code. © 2008 Elsevier B.V. All rights reserved.

Shankar Krishnapillai

Department of Mechanical Engineering

Natrajan Ganesan

Electric potential

Magnetos

Piezoelectric actuators

Piezoelectric materials

Piezoelectric transducers

Semiconducting Lead Compounds

Transient analysis

ANSYS

MAGNETO-ELECTRO-ELASTIC

MSCP

sensor

Transient response

Sensors

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Sensors and Actuators, A: Physical

Dynamic loading will generate time varying electric and magnetic fields in magneto-electro-elastic continuum. Displacement current is associated with the generation of magnetic field due to time varying electric field. The non-conservative electric field is represented using a magnetic vector potential. Studies are carried out for clamped-free and clamped-clamped boundary conditions of the structure excited with harmonic mechanical loading. The magnetic flux density in axial direction is not affected by the electric displacement current. The transverse y-direction and z-direction components of magnetic flux density are showing significant variation at higher frequencies when displacement current is accounted. © 2013 Taylor &amp; Francis Group, LLC.

Mechanics of Advanced Materials and Structures

Effect of displacement current in magneto-electro-elastic 3D beam subjected to dynamic loading

Purpose - This paper aims to present harmonic response of magneto-electro-elastic cylinder by quasi-static and fully dynamic electromagnetic theories. The quasi-static assumption uses magnetic scalar potential whereas magnetic vector potential is employed in a fully dynamic model. Design/methodology/approach - The electric field induced by time varying magnetic field is non-conservative and can be described by electric scalar potential and magnetic vector potentials. Findings - The magnitude of vector potential is dominant in axial and circumferential direction whereas the magnetic flux density is significant in radial direction. Magnetic scalar potential approach evaluates only the radial component of magnetic flux density and electric field intensity is reasonably the same as that of the magnetic vector potential approach. Originality/value - Semi-analytical finite element method is used in this paper and the vector potential is formulated in cylindrical coordinates. © Emerald Group Publishing Limited.

Multidiscipline Modeling in Materials and Structures

Dynamic analysis of magneto-electro-elastic cylindrical shells by quasi-static and fully dynamic electromagnetic theories

Transient dynamic response of magnetoelectroelastic sensors bonded to a mild steel beam using 3D magnetic vector potential approach is presented in this paper. The electric field induced by time varying magnetic field is nonconservative and can be described by electric scalar potential and magnetic vector potentials. The aim of the study is to find how different volume fractions of the composite behave in sensor applications at locations on the structure where maximum strain is induced subjected to different boundary conditions. The 3D beam and the sensor is modeled using eight nodded brick elements and the beam is subjected to dynamic loading with clamped-free and clamped-clamped boundary conditions. A perfect bonding between the mild steel beam and the sensor is assumed and the present study ignores the potential noise effects which come across during experiments. The maximum value of electric potential and the dominating component of magnetic potential corresponds to vf =0.2 of the composite. The sensor is placed at the middle of a clamped-clamped beam, vf =0.4 gives noticeably higher values of magnetic potential. © 2011 IEEE.

IEEE Sensors Journal

Dynamic response of multiphase magnetoelectroelastic sensors using 3D magnetic vector potential approach

Magnetic scalar and vector potential approaches in finite element formulation for dynamic response studies of magneto-electro-elastic solids is presented in this paper. The electric field induced by time varying magnetic field is non-conservative and can be described by electric scalar potential and magnetic vector potential. The magnitude of magnetic vector potential is dominant in transverse direction than in longitudinal directions except for FCFC boundary condition. Magnetic scalar potential approach evaluates the components of magnetic flux density on higher side where as electric field intensity is seldom influenced using both the approaches except for FCFC boundary condition. © Taylor &amp; Francis Group, LLC.

Ferroelectrics

Magnetic scalar and vector potential approaches in dynamic response studies of magneto-electro-elastic plates

Displacement current is associated with the generation of magnetic fields due to time-varying electric fields. The harmonic response of a magneto-electro-elastic axisymmetric cylinder accounting for displacement current is carried out using the semi-analytical finite element method. The non-conservative electric field is represented using a magnetic vector potential. Studies are carried out for the first circumferential harmonics of the shell structure with the clamped-free boundary condition. The contribution made to the magnetic flux density by the electric displacement current is very small at lower frequencies but it becomes significant at higher frequencies. © 2010 IOP Publishing Ltd.

Smart Materials and Structures

Finite element formulation using magnetic vector potential approach: Effects of displacement current in magneto-electro-elastic cylindrical shells

The Indian construction industry faces increasing challenges amidst serious performance shortfalls. Confronting similar issues in past decades, other countries such as the UK, USA, and Singapore commissioned high-powered studies and set up industry development bodies to address their own priorities. Initiatives in other countries are briefly reviewed before outlining the launch of the "Construction Industry Improvement Initiative India" (Ci3 India) that aims to address our own challenges. This paper focuses on identifying and launching a platform to address the current and imminent critical issues in the Indian Construction Industry. Nineteen critical issues were identified, verified, and validated through four focus group sessions at two Regional Roundtables with 54 high calibre large building construction clients, academicians, and other invited experts. The identified issues were consolidated to 10 Action Items. Seven Action Teams were then mobilized to work on the 10 Action Items. Having consolidated a base consensus of clients on the way forward, it was also proposed to develop a "Construction Clients' Charter" that will set out basic principles, protocols, and targeted good practices by lead clients, who by voluntarily agreeing and implementing these together, could catalyse significant industry improvements. © Penerbit Universiti Sains Malaysia, 2017.

Fulltext

Journal of Construction in Developing Countries

Identifying and addressing critical issues in the Indian construction industry: Perspectives of large building construction clients

Free vibration studies of multiphase and layered magneto-electro-elastic beam for BaTiO3-CoFe2O4 composite is carried out. In-plane plate finite-element analysis is used to obtain the behaviour of magneto-electro-elastic beam. Studies are carried out for beams for different boundary conditions, as may be applicable in design of smart sensors/actuators. The ANSYS package is used to validate the results obtained by the computer code developed for piezoelectric (PE) beam. Plane stress condition is used for the Euler-Bernouli magneto-electro-elastic beam. © 2006 Elsevier Ltd. All rights reserved.

Journal of Sound and Vibration

Free vibration behaviour of multiphase and layered magneto-electro-elastic beam

Extinction and Re-Ignition Predictions Using Eddy Dissipation Concept and Flamelet Generated Manifold Models for a Premixed Piloted Turbulent Jet Burner

Journal	Sensors and Actuators, A: Physical
ISSN	09244247
Open Access	No