In this study, a new four-unknown quasi-3D shear deformation theory is proposed for studying the vibration responses of functionally graded (FG) beams containing open-edge cracks resting on three-parameter viscoelastic foundations (VEFs). The number unknowns and governing equations in current has been reduced, making it easier to use. Even less than conventional theories, includes indeterminate integral variables contains only four where no correction factor used. study conducted with an eye...

In this study, we have introduced, for the first time, a novel integral quasi-3D higher-order shear deformation theory (HSDT) employing third-order shape function. This approach is employed to analyze free vibration characteristics of cracked porous functionally graded material (FGM) beam supported on three-parameter elastic foundation (Winkler/Pasternak/Kerr). new Quasi HSDT introduces stretching effect that surpasses capabilities FSDT and other HDST. The function satisfies conditions...

This article examines the impact of inclined transverse cracking on natural frequency Euler-Bernoulli-model imperfect FG beams an elastic foundation, taking into account pinned-pinned and clamped-clamped boundary conditions. The equations are diffused using classic finite element method (h-version). Material properties considered to vary in both directions beam; width thickness, power-law formula. approximate porosity model is adopted with a uniform distribution. Cracked stiffness determined...

The contribution provided in this paper is to investigate the dynamic response of bidirectional graded material beams with porosities. Higher order shear deformation beam theory for wave propagation porous functionally cantilevered are developed, taking into account distribution, which mainly represented density and Young's modulus. properties FG through thickness width using a power law distribution. governing equations derived by employing Hamilton's principle. analytic dispersion relation...

Through this scientific research, we have tried to study the effect of incorporation plastic waste on mechanical properties concrete, in order obtain good concrete with high resistance at a lower cost. To carry out work, adopted following steps: Knowledge which contains High Density Polyethylene (HDPE). Thus, natural aggregate was replaced by formulated partial substitution varying between 0%, 10% and 20%. In all mixtures, components, water, cement, gravel 3/8 8/15 sand 0/3, remained...

The study's contribution is to examine, while taking into account pinned-pinned boundary conditions, the free vibration response of multi-cracks Euler-Bernoulli perfect FG beams structure on Pasternak-Winkler elastic foundations. finite element approach used discretize equations. material properties are taken using a power-law form, and they differ in thickness width directions beam structure. 2D beam's reduced cross section calculate stiffness cracked On other hand, type foundation has...

This study investigates the natural vibration characteristics of porous plates with three different patterns porosity distributions. The analysis employs a 2D Higher Shear Deformation Theory (HSDT), which simplifies model by reducing number unknown displacement variables to four compared other theories. Material properties vary smoothly across plate thickness according Voigt's power law volume fraction mixing. shape function employed in this theory meets zero shear stress conditions on both...

This paper presents a dynamic and critical buckling analysis of the presence crack steel-polymer concrete composite beams modelled using refined quasi 3D beam theory. The model is hollow steel box section filled with material. assumed on both inner core outer layer box, incorporating its effects into mechanical behavior beam. governing equations for are derived Differential Quadrature Finite Element Method (DQFEM) combined Lagrange’s principle. study investigates natural frequencies loads...

Non-destructive evaluation using ultrasonic pulse velocity (UPV) testing has extensive applications in the cement materials industry. Ultrasonic test is accepted as alternative to destructive determine compressive strength, dynamic modulus of elasticity, and Poisson’s ratio, which are needed for structural design. In modern construction technology, use Plastic waste (PW) a partial replacement natural aggregates mortar mix growing popularity primarily because it reduces initial capital cost...

This paper deals with the analytical modelisation and numerical simulation of fluid structure interaction (FSI) phenomena pipeline. The equations motions equilibrium are coupled together taking into account influence flow inside pipe. circulating in pipe has flexional motion as that structure. model is based on Newtonian approach. practicability calculation effects fluid-structure illustrated by calculations for some simple systems, boundary condition pinned-pinned. Independently method, a...

The contribution of this study is to examine the potential using reclaimed asphalt pavement (RAP) as a replacement for natural aggregates (NA) in production roller-compacted concrete (RCC). In several countries, recycling old pavements has gained interest due its economic and environmental advantages. However, Algeria, large quantities RAP are generated annually, yet they rarely quantified or reused. This research investigates use coarse aggregates, testing five different levels (0%, 25%,...

In this article, the influences of uniform velocity profile, mass ratio, length and Winkler elastic foundation on static instability pipe conveying incompressible fluid are investigated. The Euler-Bernoulli beam theory is employed to derive partial differential equation pipes carrying fluid. results were carried out using ANSYS Workbench program, where analysis based numerical solution; Finite element method formulate both structure flow equations. approach some research analytical models....