We report on the thickness dependent laser cooling in CdS nanobelts pumped by a 532 nm green laser. The lowest achievable cooling temperature is found to strongly depend on thickness. No net cooling can be achieved in nanobelts with a thickness below 65 nm due to nearly zero absorption and larger surface nonradiative recombination. While for nanobelts thicker than ~120 nm, the reabsorption effe...

In steel fiber reinforced concrete, the interface is a very complex and weak structure. It because of layer between matrix that reinforcing toughening properties cannot be fully exerted. The bond performance core meso-mechanical concrete. To study its influence on mechanical three-phase finite element models pull-out are established based cohesive zone model unified phase-field theory by means ...

The effect of weld heat input on the formation of intermetallic compound (IMCs) layer during arc welding–brazing of aluminium and steel dissimilar alloys, was investigated through both finite element method (FEM) numerical simulations and experimental measurements. The results of FEM analysis as well as welding experiments indicated that increasing weld heat input increases the thickness of IMC...

We study the steady-state potential in a high contrast medium with a resistive thin layer. We provide asymptotic expansion of the potential at any order. Transmission conditions at any order and the corresponding variational formulation are given. We prove uniform estimates with respect to the thickness of the layer and with respect to its resistivity. The main insight consists in the uniform v...

Abstract The aerodynamical optimal design (OD) of the shape of flying configurations (FCs) can be improved by refinements of its start software used for the optimization and of the optimization strategy itself. The author has two times enlarged the classical variational method. The first one consists in the inviscid global OD of the FC’s shape (the optimization of the camber, twist, thickness a...

This review article demonstrates the zero to one innovation capability of fullerene nanoarchitectonics in material advances.

Siffness matrices for axial and bending deformations of a beam having a rectangular cross sectional area of constant width and linearly varying thickness are developed. A consistant load vector for a uniformly distributed lateral load is also calculated, using the principal of potential energy. The matrices are used to obtain numerical results for a variety of beams with non-uniform thickness t...

The purpose of introducing ultrasonic vibrations in the tube hydroforming process is to create more formability by obtaining a lower corner radius, improve thickness distribution of the wall and provide good tribological conditions at the tube and the die interface. Vibrations imposed on the die create alternating gaps which improve the formability in the tube hydroforming process in the presen...