In this paper, natural frequencies and dynamic response of thick beams made of saturated porous materials resting on viscoelastic foundation are investigated for the first time. The beam is modeled using higher-order beam theory. Kelvin-voight model is used to model the viscoelastic foundation. Distribution of porosity along the thickness is considered in two different patterns, which are symme...

In this study, the mechanical buckling response of refined hyperbolic shear deformable (FG) functionally graded nanobeams embedded in an elastic foundation is investigated based on the refined hyperbolic shear deformation theory. Material properties of the FG nanobeam change continuously in the thickness direction based on the power-law model. To capture small size effects, Eringen’s nonlocal e...

The mechanical behaviour and design of fixed-ended steel equal-leg angle section members subjected to axial compression are addressed in this study. First, the critical buckling is described. Experimental data on columns collected from literature then used for validation numerical (shell finite element) models, developed within commercial package ABAQUS. Validation performed by means comparison...

The eccentric compression behavior of laminated bamboo lumber (LBL) columns with a chamfered section was investigated using eccentricity 30 mm, 60 90 mm and 120 mm. effect ratio on the ultimate bearing capacity, strain failure mode analyzed through tests. modes LBL different eccentricities were basically same, which belonged to brittle tension failure. With increase in ratio, capacity gradually...

Concrete-filled double skin steel tubular columns consisting of two hollow tubes and concrete infill between their interspace, have become popular in modern construction owing to high ultimate load, less self-weight good ductility. The weight these can be reduced further by using lightweight aluminium alloy instead ones. This paper experimentally numerically studied the flexural buckling behavi...

This paper aims at investigating the optimum location of a single longitudinal stiffener having various cross-section types steel plate girders subjected to bending loading. The is found using gradient-based Interior-Point (IP) optimization algorithm. procedure involves linear elastic buckling analysis with finite element method, which coupled aforementioned IP algorithm and used calculate coef...

A complete investigation on the free vibration and stability analysis of beams made of functionally graded materials (FGMs) containing open edge cracks utilizing four beam theories, Euler-Bernoulli, Rayleigh, shear and Timoshenko, is performed in this research. It is assumed that the material properties vary along the beam thickness exponentially and the cracked beam is modeled as two segments ...

The main goal of this research is to analyse the effect of angular velocity on stability and vibration of a simply supported Rayleigh rotating shaft. To this end, non-dimensional kinetic and potential energies are written while lateral vibration is considered. Finite element method is employed to discrete the formulations and Linear method is applied to analyse instability threshold of a rotati...