An engineering design procedure for calculating bending with torsion in corrugated beams, including finding the critical load of general stability, implemented commonly used MS Excel spreadsheet and verified LIRA-SAPR software package, has been proposed. The method makes it possible to take into account beams section variability corrugation parameters, estimate loading eccentricity effect, avai...

This paper presents a numerical evaluation of two different artificial stress diffusion techniques for the stabilization viscoelastic Oldroyd-B fluid flows at high Weissenberg numbers. The standard in form Laplacian extra tensor is compared with newly proposed approach using discrete time derivative tensor. Both methods are implemented finite element code and demonstrated solution flow two-dime...

Abstract Two different methods of artificial diffusion stabilization the numerical simulations steady Oldroyd-B fluids flows are presented. They based on idea vanishing in time added terms which only present during initial stage time-marching process towards state solution. These extra naturally vanish and do not affect final result. The built a simple 2D case fluid flow symmetrical corrugated ...

Convective heat transfer and friction factor properties for periodic undulating channels are numerically investigated. The finite volume method (FVM) was used in the numerical study. Three different Reynolds averaged simulation (RANS) based turbulence models, shear stress transport SST k-ω transition model were compared with each other. Two used; first geometry is a sharp corrugated channel 30°...

The peak strain (PS) of sheet metal highly affects the process design and quality roll formed product. Different from traditional forming technology (RFT) that all cross section contours product are rolled simultaneously, a symmetric RFT is developed with respect to corrugated channels avoid defects like tearing, twist, redundant deformations. behaviors their strains subsequently simulated fini...

We present a simple mechanical model for dynamic wetting phenomena. Metallic balls spread along a periodically corrugated surface simulating molecules of liquid advancing along a solid substrate. A vertical stack of balls mimics a liquid droplet. Stochastic motion of the balls, driven by mechanical vibration of the corrugated surface, induces diffusional motion. Simple theoretical estimates are...

To obtain the eigenmodes of the electromagnetic field at a periodically corrugated metamaterial we consider a theory of spoof plasmons propagating on metamaterial perforated with planar periodic grooves. We present the rigorous modeling and analysis of surface waves at the boundary of the corrugated metamaterial structure. Particularly, we pay special attention to the ways of controlling the pr...

We describe the genetic and kinetic defects in a congenital myasthenic syndrome due to the mutation epsilonA411P in the amphipathic helix of the acetylcholine receptor (AChR) epsilon subunit. Myasthenic patients from three unrelated families are either homozygous for epsilonA411P or are heterozygous and harbor a null mutation in the second epsilon allele, indicating that epsilonA411P is recessi...

This paper deals with the interaction between a moving wheelset and a slab track due to the shortpitch corrugated rail. The wheelset is modeled using a free-free Timoshenko beam with attached rigid bodies as the axle boxes, wheels and brake discs. The slab track model consists of elastically supported double EulerBernoulli beams. In fact, both wheelset and slab track are symmetric structures an...

Steel extended end plate bolted connections are recommended to be widely utilized in special moment-resisting frame subjected to monotonic loading. Improper design of steel beam to column connection can lead to the collapse and fatality of structures. Therefore comprehensive research studies of beam to column connection design should be carried out. Also the performance and effect of corrugated...