The increase of shear strength in soil, reinforced with the geogrid (alternate reinforcer), is resulted from an increase of modulus of soil hardness, and also from the tensile strength of reinnforcer. The shear strength of contact surface in soil appears due to both the friction strength against the contact surface, and the passive strength formed in front of the elements of the geogri...

Adhesion of biological systems is often made possible through thin elastic layers, such as human skin. To address the question of when a layer is sufficiently thin to become adhesive, we extended Green’s function molecular dynamics (GFMD) to account for the finite thickness of an elastic body that is supported by a fluid foundation. We observed that thin layers can much better accommodate rough...

The microwave-assisted synthesis of goethite nanoparticles has been studied. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential thermal analysis (DTA) and Brunauer-Emmett-Teller (BET) method. Goethite rod-like nanoparticles have been successfully synthesized in 10 min of microwave treating at 100 °C. Part...

Herein, we study the microstructuring of toluene-vapor-softened polystyrene surfaces with nonsolvent sessile droplets. Arrays of microvessels are obtained by depositing non-evaporating droplets of ethylene glycol/water on the original polystyrene surfaces and subsequently exposing them to saturated toluene vapor. The droplets act as a mask on the polymer, thereby impeding the toluene vapor to d...

Rationale: Development of string rails with low weight per meter and high-performance characteristics that determine durability, wear resistance, reliable grip vehicle wheels to the rail rolling surface is a vital task.
 Objective: investigate impact geometric parameters steel wheel flexible polymer coating on performance characteristics; choose most optimal contact pair wheel-rail.
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In this study, the resonance-frequency dependence and modal sensitivity of flexural vibration modes overhang/T-shaped microcantilevers to interaction force surface stiffness variations were analysed, a closed-form expression was derived. The Euler–Bernoulli beam theory used develop models, characteristic formula representing cantilever frequencies on overhang dimensions obtained. results derive...

When two small fluid drops are sufficiently close, the van der Waals force overcomes surface tension and deforms surfaces into contact, initiating coalescence. The dynamics of deformation across an inviscid gap falls distinct regimes (Stokes inertial–viscous) characterized by forces that balance attraction at leading order (viscosity, both inertia viscosity). previously studied Stokes regime ho...

This work presents an investigation on the influence of pitting in EHL rolling contact. The geometry comes as extension architecture for multi-physical numerical calculations element bearing contacts based OpenFOAM. model utilized is built according to state-of-the-art fluid–solid interaction and electro-quasi-static fields. In this framework, contact reduced be two dimensional order reduce com...