Damping optimisation of hybrid active–passive sandwich composite structures

A finite element model using a unified formulation for the analysis of viscoelastic sandwich laminates

“…It is therefore of interest to write the Hooke's law on the material coordinate system 1,2,3 into the reference coordinate system x, y, z. The relations between the two coordinate systems are expressed as: (12) and T denotes the matrix of direction cosines of the coordinate transformation. Using previous relations, we can finally obtain the stress-strain relations in the reference coordinate system as…”

“…More recently, Araújo et al [9][10][11][12] have presented and used for optimisation and viscoelastic material identification purposes a sandwich finite element model based on an eight nodded serendipity plate element. The viscoelastic core layer is modelled according to a higher order shear deformation theory and adjacent elastic and piezoelectric layers are modelled using the first order shear deformation theory.…”

Multiobjective design of viscoelastic laminated composite sandwich panels

“…A multiobjective approach was also considered [7] for minimizing weight and maximizing the fundamental modal loss factor of the sandwich. In the framework of both active and passive damping optimization, the optimal positioning of piezoelectric sensors and actuators [9] was obtained for a viscoelastic laminated sandwich plate with surface bonded piezoelectric patches. This formulation was more recently extended using a topological approach and the DMS (Direct MultiSearch) solver to find the optimal positioning of surface bonded sensors and actuators for damping maximization in a given frequency range [10].…”

A two-level procedure for the global optimization of the damping behavior of composite laminated plates with elastomer patches

“…Rather complete, though not exhaustive reviews on this subject can be found in (Nakra 1998;Chandra et al 1999;Berthelot et al 2008;Vasques et al 2010a;Vasques et al 2010b;Benjeddou 2001;Trinidade and Benjeddou 2002). Moreover, concerning both active and passive strategies for designing the damping properties of hybrid composite/elastomer sandwich plates the reader is addressed to (Araújo et al 2009;Araújo et al 2010;Araújo et al 2012;Sher and Moreira 2013).…”