Based on doublet mechanics theory and various beam theories, this paper presents free vibration of axially loaded zigzag armchair nanobeams. A two-noded higher order element is used to solve the problems nanobeams with boundary conditions. The verification studies in terms fundamental frequencies buckling loads are performed by comparing results present model Molecular Dynamic Simulations, Doub...

Abstract This study presents the findings of a 3D finite element modeling on performance single pile under various slenderness ratios (25, 50, 75, 100). These percentages were assigned to cover most commonly configuration used in such kind piles. The effect soil condition (dry and saturated) response was also investigated. modeled as linear elastic, surrounded dry layers simulated by adopting m...

In order to study the compression bearing capacity of concrete-filled rectangular stainless steel tubular columns, influence tube thickness, relative eccentricity, and slenderness ratio on is analyzed, then calculation formula proposed. The results show that finite element model can effectively simulate capacity, mean calculations Nufem test Nuexp 0.985, variance 0.000621. eccentricity have a g...

In this paper, we study the influence of an original airship design on its stability modes. Based verified model YEZ-2A airship, Sobol sensitivities are calculated to filter parameters. The hull length, slenderness ratio hull, exponent tail, fin installation position and half-span found be large influences all modes, whereas modes comparatively insensitive bow relative thickness. empirical form...

The energy absorption of concrete filled, hollow-steel bracing was analyzed respect to geometric and mechanical parameters including the width-to-thickness section ratio, slenderness level, and strength of the steel and concrete. Local buckling and ductility were also investigated with respect to variation in the cross-section. The infill increased the compression resistance, even after multipl...

Stroke patterns for Purcell's three-link swimmer are optimized. We model the swimmer as a jointed chain of three slender rods moving in an inertialess flow. The swimmer is optimized for efficiency and speed. We were able to attain swimmer designs significantly more efficient than those previously suggested by authors who only consider geometric design rather than kinematic criteria. The influen...

We propose a new class of approximate local DtN boundary conditions to be applied on elliptical-shaped exterior boundaries when solving acoustic scattering problems by elongated obstacles. These conditions are : (a) exact for the first modes, (b) easy to implement and to parallelize, (c) compatible with the local structure of the computational finite element scheme, and (d) applicable to exteri...

Buckling and post-buckling thermomechanical deformations of a functionally graded material (FGM) Timoshenko beam resting on a two-parameter nonlinear elastic foundation and subjected to only a temperature rise have been numerically investigated with the shooting method. The material properties are assumed to vary only in the thickness direction according to a power law function. Through-the-thi...

Under the influence of axial forces and uniform temperature variations, thermal buckling postbuckling composite beams reinforced functionally graded multilayer graphene platelets (GPLs) resting on nonlinear elastic foundations are examined. The Halpin-Tsai model is used to calculate modulus each layer GPL-reinforced (GPLRC). According virtual work principle, governing equations for beam obtaine...