We describe the localized folding of thick layers embedded in a viscoelastic framework. Higher-order partial differential equations such as Swift-Hohenberg equation are standard for modelling process. Using high-order shear theory, we modify to buckling and consider folded layer's behavior. The use enables us strains parallel during folding. Our model naturally captures softening-stiffening beh...

numerous techniques have been presented by different researchers to analyze piled raft. in order to analyze pile foundation, soil can be modeled as spring, continuous medium, or porous media. pile can also be modeled as spring or continuous medium. this study includes three main stages: a short description of different types of analysis methods of pile foundation, writing a computer program bas...

The present study theoretically investigates the free vibration problem of a discrete granular system. This can be considered as simple model to rigorously effects microstructure on dynamic behavior equivalent continuum structural model. consists uniform grains confined by elastic interactions, take into account lateral contributions. repetitive system referred Cosserat chain or lattice with sh...

Abstract This work deals with the analysis of free vibration problem elastic delaminated composite beams. The mainly consists a model development and improvement stage based on first-order shear deformable beam theory. A general is developed taking bending-extensional coupling into account. specified built-in end, one novelties this consideration fact that cannot be fixed rigidly in reality. Th...

A complete investigation on the free vibration of bilayer graphene nanoribbons (BLGNRs) mod-eled as sandwich beams taking into account tensile-compressive and shear effects of van der Waals (vdWs) interactions between adjacent graphene nanoribbons (GNRs) as well as between GNRs and polymer matrix is performed in this research. In this modeling, nanoribbon layers play role of sandwich beam layer...

The effectiveness of p-aminobenzoic acid (PABA) in overcoming sulfanilamide (SA) growth inhibition of Escherichia coli was explained on the basis that PABA was an essential metabolite and that SA interfered with -its utilization by the cell (Woods, 1940). Reversal of sulfonamide action by structurally unrelated metabolites such as methionine, xanthine, serine, thymine and valine (Shive, 1950; W...

In the present paper, a novel unconstrained higher-order theory (UCHOT) is applied to analyse free vibration of cylindrical sandwich shells with nanocomposite face sheets reinforced graphene platelets. UCHOT considers shear and thickness deformations. It assumed that cylinder includes soft core which embedded between functionally graded platelets composites (FG-GPLRC). FG-GPLRC sheet consists s...

In this paper, it is tried to find an approximate single layer equivalent for multi-layer graphene sheets based on third order non-local elasticity theory. The plates are embedded in two parameter Winkler-Pasternak elastic foundation, and also the thermal effects are considered. A uniform transverse load is imposed on the plates. Applying the non-local theory of Eringen based on third order she...