The present article dealswith a dynamic response analysis of a foam-based nanoscale plate based on finite strip method (FSM). The nanoscale plate formulation has been adopted based upon a higher order plate theory and then, a higher orderfinite strip has been used to solve the problem.The considered finite strip is capable of considering the bending displacement and also shear deformation effects. The foam-based material has been treated as a porous material with some particular pore distribution. The non-uniformity ofstrain field as well asthe nonlocality ofstress field have been incorporatedwith the usage of nonlocalstrain gradient elasticity.It is clearly showen that the proposed solution based on finite strip method can accurately simulate the dynamic response of considered plate under external forces.The scale factors due to smallsize of the plate and foam-based material willshow a remarkable impact on the dynamic response.

This paper presents a careful theoretical investigation into interfacialstressesin damaged RC cantilever beamwith bonded prestressedFRPcomposites,taking into accountloadingmodel,shearlag effect and theprestressed compositesimpact.These composites areused,in particular,forrehabilitationofstructuresby stoppingthepropagation of the cracks. They improve rigidity and resistance, and prolong their lifespan. In this paper, an original model is presented to predict and to determine the stresses concentration attheFRPend,with the newtheory analysis approach. This research gives more precision related to the others studies which neglect the effect of prestressed composites coupled with the applied loads. A parametric study has been conducted to investigate the sensitivity of interface behaviorto parameterssuch aslaminate and adhesive stiffness, the thickness ofthe laminate and the fiber orientations where allwere found to have amarked effect on themagnitude ofmaximumshear and normalstressin the composite member. The numerical resolution was finalized by taking into account the physical and geometric properties of materialsthat may play an important role in reducing the stress values. Thisresearch is helpful for the understanding on mechanical behaviour ofthe interface and design ofthe FRP-damagedRChybrid structures.

A delamination analysis of a multilayered inhomogeneous beam structure under linear creep is developed. A viscoelastic model that consists of an arbitrary number of linear springs and linear dashpots is used. The cross-section of the beam is a circle. The beam is made of concentric longitudinal layers. Each layer is continuously inhomogeneous in thickness and length directions. Therefore, the shear moduli and the coefficients of viscosity ofthe viscoelastic model are distributed continuously along the thickness and length of each layer. Two concentric delamination cracks are located arbitrary between layers. The beam is loaded in torsion. Time-dependent solutions to the strain energy release rate for the two delaminations are derived by using the time-dependent strain energy in the beam. The strain energy release rates are derived also by the compliance method for verification. The variation of the strain energy release rate with time due to creep is evaluated. The effects of material inhomogeneity, external loading and delamination length on the strain energy release rate are investigated.

The surface effect for a forced vibration of a double-nanobeam-system (DNS) coupled by a viscoelastic layer under a moving constant load is studied in this paper. The viscoelastic layer that couples the nanobeams to each other, is modelled as spring-damper system. The Euler- Bernoulli theory and a simply supported boundary condition are considered for both nanobeams. By using the analytical solution, the dynamic displacement is obtained by considering the surface elasticity and residual tension effect on each nanobeams. Furthermore, the several significant parameters such as the velocity of the moving load, spring constant, damping coefficient and also the surface effect have been studied using some plots and examples. Finally, by observing the diagrams it was concluded that as the length of the beams reduces, the surface effect has a considerable effect on each of nanobeams especially at Nano scale, where it was not achieved by classic theories.

The paper is devoted to the study of thermomechanical interactions in a homogeneous nonlocal magneto-thermoelastic rotatingmediumunderthe effect of hall current and two temperaturewith memory dependent derivatives. Atwo-dimensional model has been assumed. Laplace and Fourier transforms have been used to find the solution to the problemin transformed domain. The analytical expressions of components of displacement,stress and current density and conductive temperature are obtained in the transformed domain. Numerical inversion technique has been applied to obtain the results in the physical domain and the results are depicted graphically to show the effect of nonlocal parameter on the components of displacements, stresses, current density and conductive temperature. The effect of nonlocal parameter and hall current parameter has been represented graphically by taking different values.