Viscoelastic sandwich structure is playing an important role in mechanical equipment. The aging condition identification of viscoelastic essential for monitoring structural health and guaranteeing the safe operation development a reliable intelligent method ongoing attempt. By analyzing vibration response signals, multi-sensor data fusion using multi-scale permutation entropy (MPE) ensemble-bas...

Loss factor measurements were performed on different sandwich panels to determine the effects of different skin and core materials on the acoustical properties of sandwich structures. The study included the following panel/beam designs: glass-epoxy skin with a meta-aramid (m-aramid) core, glass-epoxy skin with a para-aramid core, carbon skin with a m-aramid core, carbon skin with a m-aramid cor...

Abstract Viscoelastic materials is a kind of damping which has been wildly applied in vibration control ocean and civil engineering, viscoelastic mostly work complex thermoelectric multi-field coupled environment. In this work, two-dimensional plate studied with stain relaxation time time. The placed magnetic field, the upper surface subjected to thermal shock. problem investigated by modified ...

handling of endodontic sealers is greatly dependent on their elasticity and flow ability. we compared the viscoelastic properties of three root canal sealers.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' instructions. the resulted pastes were ...

We examine the elastic shear waves generated in a thin pre-stressed elastomer layer that is sandwiched between two relatively thick steel plates and is subjected to an elastic shear wave traveling in one of the steel plates. The elastomer layer has been deformed in uni-axial strain in advance, producing in the layer very large axial and lateral compressive stresses of the order of its bulk modu...

An analytical solution for a sandwich circular FGM plate coupled with piezoelectric layers under one-dimension heat conduction is presented in this paper. A nonlinear static problem is solved first to determine the initial stress state and pre-vibration deformations. By adding an incremental dynamic state to the pre-vibration state, the differential equations are derived. The role of thermal en...

In this paper, layerwise theory (LT) along with the first, second and third-order shear deformation theories (FSDT, SSDT and TSDT) are used to determine the stress distribution in a simply supported square sandwich plate subjected to a uniformly distributed load. Two functionally graded (FG) face sheets encapsulate an elastomeric core while two epoxy adhesive layers adhere the core to the face ...

The article is devoted to the study of mechanical response an electro-viscoelastic structure if electric voltage with given characteristics supplied a piezoelectric element attached surface structure. A cantilever plate made viscoelastic material considered as under study. amplitude displacements free end in resonance modes occurring at forced steady-state vibrations response. Excitation realiz...