Recent developments on the optimization and parameter estimation in hybrid active-passive composite sandwich structures are presented. For this purpose, a mixed layerwise finite element model has been formulated, by considering a higher order shear deformation theory to represent the displacement field in the viscoelastic core and a first order theory for the displacement fields of the adjacent...

OBJECTIVE Handling of endodontic sealers is greatly dependent on their elasticity and flow ability. We compared the viscoelastic properties of three root canal sealers. MATERIALS AND METHODS AH Plus (Dentsply, De Trey, Konstanz, Germany), Endofill (Dentsply Hero, Petrópolis, Rio de Janeiro, Brazil) and AH26 (Dentsply, De Trey, Konstanz, Germany) were mixed according to the manufacturers' inst...

Two-dimensional vertical impact of a rigid blunt body onto floating ice plate is studied. The problem coupled and unsteady. liquid inviscid, incompressible, infinite depth. floe modeled as thin viscoelastic constant thickness. edges are free bending stresses shear forces. upper surface the covered with layer small thickness negligible inertia. reaction force this soft predicted by nonlinear one...

The research object of this work is an orthotropic viscoelastic plate with arbitrarily varying thickness. was subjected to dynamic periodic load. Within the Kirchhoff–Love hypothesis framework, a mathematical model built in geometrically nonlinear formulation, taking into account tangential forces inertia. Bubnov–Galerkin method, based on polynomial approximation deflection and displacement, us...