Raju Sethuraman

This paper deals with buckling, free vibration and damping analysis of viscoelastic sandwich beam with constrained magnetostrictive layer. Eight node plane stress element is used for the analysis. The influence of viscoelastic core thickness and magnetostrictive layer thickness on the buckling and dynamic analysis of sandwich beam under magnetic environment is analyzed by considering the initial stresses due to uniform magnetic field. The validation is carried out using commercial package ANSYS 8.1, based on the thermal analogy concept given by Cote et al. [Dynamic and static modeling of piezoelectric composite structures using a thermal analogy with MSC/NASTRAN, Compos. Struct. 65 (2004) 471-484]. © 2008 Elsevier B.V. All rights reserved.

The paper deals with the investigation of linear buckling and free vibration behavior of layered and multiphase magneto-electro-elastic (MEE) beam under thermal environment. The constitutive equations of magneto-electro-elastic materials are used to derive finite element equations involving the coupling between mechanical, electrical and magnetic fields. The finite element model has been verified with the commercial finite element package ANSYS. The influence of magneto electric coupling on critical buckling temperature is investigated between layered and multiphase magneto-electro-elastic beam. Furthermore, the influence of temperature rise on natural frequencies of magneto-electro-elastic beam with layered and different volume fraction is presented. © 2007 VSP.

Purpose - The purpose of the paper is to investigate the linear thermal buckling and vibration analysis of layered and multiphase magneto-electro- elastic (MEE) cylinders made of piezoelectric/piezomagnetic materials using finite element method. Design/methodology/approach - The constitutive equations of MEE materials are used to derive the finite element equations involving the coupling between mechanical, electrical, magnetic and thermal fields. The present study is limited to clamped-clamped boundary conditions. The linear thermal buckling is carried out for an axisymmetric cylinder operating in a steady state axisymmetric uniform temperature rise. The influence of stacking sequences and volume fraction of multiphase MEE materials on critical buckling temperature and vibration behaviour is investigated. The influence of coupling effects on critical buckling temperature and vibration behaviour is also studied. Findings - The critical buckling temperature is higher for MEE axisymmetric cylinder as compared to elastic cylinder. Originality/value - Linear thermal buckling and vibration analysis of MEE axisymmetric cylinders are studied using the finite element approach. The structure can be used for active vibration control, sensors and actuators. Studying the buckling and vibration behaviour of such structures and influence of coupling effect is extremely useful for the design of magnetoelectroelastic structures. © Emerald Group Publishing Limited.

The constitutive equations of MEE materials are used to derive the finite element equations involving the coupling between mechanical, electrical and magnetic fields. The candidate materials for this study are piezoelectric (BaTiO3) and magnetostrictive (CoFe2O4) material. The linear buckling and vibration behavior of layered MEE beam under uniform magnetic field is carried out using finite element method. The present study is limited to clamped-clamped boundary conditions. The influence of stacking sequences and piezoelectric coupling on critical buckling magnetic field and vibration behaviour is investigated. © (2014) Trans Tech Publications, Switzerland.