3/10/2023 0 Comments Honeycomb hamiltonCong and Duc studied the nonlinear dynamic analysis of porous eccentrically stiffened (PES) doubly-curved shallow auxetic shells with negative Poisson's ratio (NPR) subjected to blast, mechanical and thermal loads resting on Visco-Pasternak foundation. investigated dynamic response and vibration of composite doubly-curved shallow shells with negative Poisson's ratios in auxetic honeycombs core layer on elastic foundations subjected to blast and damping loads. By using the finite element method (FEM), the dynamic response analysis of sandwich composite plates with an auxetic honeycomb core was investigated. In the recent years, the auxetic materials as the core of the sandwich structures have been considered by many researchers. analyzed static bending and hygro-thermo-mechanical vibration analysis of FGM sandwich doubly-curved nanoshells resting on the elastic foundation, which include a homogenous core made of full ceramic while the top and bottom layers vary through the thickness with the law of uneven porosity distribution. in uniform thermal environment using finite element method. The free vibration behavior of rotating pretwisted sandwich conical shell panels with FGM graphene-reinforced composite face sheets and homogenous core is investigated by Singha et al. The sandwich cylindrical shells are composed of FGM porous core and two FGM face sheets. dealt with the nonlinear behavior of sandwich cylindrical shells reinforced by spiral stiffener subjected to torsional load in the thermal environment. The shell skin is reinforced by stringer, circular ring and spiral stiffeners. investigated the nonlinear torsional buckling and postbuckling of FGM sandwich cylindrical shells with the von Karman large deflection nonlinearities under thermal effect. The shells are subjected to the combination of mechanical, thermal, and damping loading. Nonlinear vibration of FGM sandwich doubly-curved shallow shells was investigated by Dong and Dung, which reinforced by FGM stiffeners and rested on the Pasternak foundation. explored the bifurcation and stability of the FGM sandwich doubly-curved shallow shell which is subjected to the in-plane excitation in thermal environment. Sofiyev and Osmancelebioglu demonstrated the effectiveness of FGM coatings in the vibration of sandwich truncated conical shells.įor the thermal effect in the FGM sandwich shells, Pandey and Pradyumna presented a layerwise finite element formulation for dynamic analysis of FGM sandwich shells in thermal and non-thermal environments. studied the free vibration of FGM sandwich doubly-curved shallow shells, which adopted a novel model with stretching effects. investigated the recovery of through-the-thickness transverse normal and shear strains and stresses in statically deformed FGM doubly-curved sandwich shells. By using the generalized zigzag displacement field and the Carrera Unified Formulation (CUF), Tornabene et al. Parand and Alibeigloo presented the elasticity solution for static and free vibration of sandwich cylindrical shell with FGM core and viscoelastic interface. Sofiyev and Kuruoglu investigated the parametric instability of sandwich cylindrical shells with a FGM core under static and time dependent periodic axial loads. Recently, sandwich shells composed of functionally graded materials (FGMs) have attracted the attention of many researchers because of their ability to withstand high temperatures and their continuous variation of elastic property. Among them, different shell models were developed, such as cylindrical shell, ,, ,, doubly-curved shell, ,, and conical shell. Shells have increased structural stiffness compared to plates in carrying loads, therefore, the mechanical behavior of the sandwich shells have been studied by many researchers over the long period of time. Such structures are consisted of a low-density core boded with two thin face sheets to achieve the excellent properties,. The sandwich structures are widely used in many modern engineering such as aeronautics and aerospace, sport cars, sailing boats and building facades in laminated glass. Over the decades, the mechanical behavior of the beam-, plate- and shell-type structures have received intensive attentions,.
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