An energy-based, phase field model is developed for the coupling of two incompressible, immiscible complex fluid phases, in particular a nematic liquid crystal phase in a viscous fluid phase. The model consists of a system of coupled nonlinear partial differential equations for conservation of mass and momentum, phase transport, and interfacial boundary conditions. An efficient and easy-to-impl...

The Direct Strength Method (DSM) is a well-known formulation presented in the Brazilian standard ABNT NBR 14762:2010, that estimates strength capacity of cold-formed steel (CFS) members. However, this requires elastic critical buckling loads as point departure, regarding local (L), distortional (D) and global (G) modes, which can be obtained by (i) analysis or (ii) available direct equations. p...

Current standards and specifications do not provide specific design methods to determine the lateral-torsional buckling (LTB) strength of girders with trapezoidally corrugated web. In international literature there are some previous investigations available focusing on LTB web girders. Based numerical calculations analytical solutions have been derived in past, however, is a lack experimental t...

Abstract The optimisation of the cross sectional geometry cold-formed steel sections has been subject numerous past studies. These walls consist intermittently placed studs, lined most commonly with gypsum plasterboards. Experimental evidence shown that restraints provided by wall sheathing can have a significant impact on axial compression capacity these studs. However, studies incorporating i...

The use of cold-formed steel (CFS) back-to-back channels as floor joists is increasing steadily, and such beams often include un-stiffened holes for installation services, which reduces their flexural strength due to the reduced web area. A new generation CFS with edge-stiffened has been widely used. However, no research undertaken understand effects composite actions on moment capacity built-u...

Ash&act-In an earlier paper the authors proposed a geometrical description of distortional plastic hardening. The parameters of this model describe, in turn, all the elements of transformation of the initial yield surface, namely proportional expansion, translation, affine deformation, rotation, and distortion. The present paper is devoted to evolution equations for individual parameters: after...

the plate girders are used in important structural systems. the earlier design of plate girders was restricted to their critical bukling capacity. experimental and theoretical studies show the plate girders with vertical stiffners can carry load over than their critical buckling loads and then in modern design codes is permitted to use post- buckling capacity of them. in this case the out- of- ...