Materials Literature
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A freely cooling granular gas without any external force evolves from the initial homogeneous state to the inhomogeneous clustering state, at which the energy decay deviates from the Haff’s law. The asymptotic behavior of energy in the inelastic hard sphere model have been predicted by several theories, which are base…
We make use of recent extensions of kinetic theory of granular gases to include the role of particle stiffness in collisions to deal with pressure-imposed shearing flows between bumpy planes in relative motion, in which the solid volume fraction and the intensity of the velocity fluctuations are not uniformly distribu…
One of the main representatives of optical plastics is polymethylmethacrylate – PMMA, characterized good technological properties when processed by method of injection molding. Products made of PMMA have high construction and surface appearance properties, and light transmission of up to 92%, as a result of production…
The work is devoted to the overview of some technological features inherent in titanium and titanium alloys connected with specific physico-mechanical properties in the course of plastic deformation. All these features need to be considered when designing manufacturing techniques of products from titanium base alloys.…
The mechanical pulp yield is about 85 to 95% of the original wood, compared with around 45 to 55% for chemical pulp. Hardwood mechanical pulp has the desirable properties of low cost, high opacity and good printing quality due to its high bulk, high smoothness, resiliency, and good ink absorption. Hardwood mechanical…
and stimulates their proliferation. However, the effects of such protein layers are usually rather modest, which might be explained by the loss immobilized proteins due to their weak non-covalent association with the tissue culture plastic. Here we describe a simple protocol for a controlled fixation of fibronectin, v…
The aim of this paper is to investigate the influence of a thermoplastic stitched reinforced tape location in the seam, on seam slippage, seam strength and seam efficiency. Seam samples without reinforcement and reinforced with a fused tape were prepared. All the samples were prepared with 1.2 cm seam allowance. The s…
By changing the measurement temperature ( T ), one can vary the effective sample size so as to study the renormalization group (RG) (or T -driven) flow of a semiconductor, a topological insulator, or a graphene device in the complex conductivity plane.
The Transformer sustains various types of faults while in the working condition. There will be changes in electrical, mechanical and chemical properties in different parts of transformer before its failure. These changes in properties can be monitored by different condition monitoring methods. With proper analyzing th…
Most of the distribution systems are nowadays upgraded to underground systems. Cross-linked polyethylene (XLPE) insulation has been employed as an insulator in underground power cables due to its excellence in electrical properties. The environmental issues in service have been the major studied problem that associate…
The traditional way of manual cleaning stairs, not environmental protection, cleaning efficiency and low, cleaning workers time and labor, in order to solve this problem, the design of a low power MSP430 series single chip staircase. The cleaning machine realizes the combination of the triangular roller and the ordina…
This paper considers the NERA and EERA programs in detail. These programs are used to calculate expected seismic effects on construction sites. Scientific publications and normative documents cover the calculation problems of seismic effects only partially. This significantly complicates both the calculations and asse…
Corrosion of reinforcement is the most common type of deterioration of reinforced concrete structures and bridges. Serious degradation of the mechanical properties of reinforcing bars is because of corrosion. Pitting corrosion is the main form of corrosion. The nonlinear stress-strain behavior of corroded reinforcing…
We address the analysis of the Souza-Auricchio model for shape-memory alloys in the finite-strain setting. The model is formulated in variational terms and the existence of quasistatic evolutions is obtained within the classical frame of energetic solvability. The finite-strain model is proved to converge to its small…
Nanocomposites of different concentrations of cadmium sulfide nanoparticles in a polyacrylamide shell were obtained as a result of the reaction of cadmium nitrate with acrylamide and a tiosulfiding agent (thiourea) in certain stoichiometric ratios followed by thermal polymerization of the reaction mixture. The samples…
This study focuses on the occurrence of bubble nucleation in a liquid confined in a nano scale confinement and subjected to rapid cooling at one of its wall. Due to the very small size scale of the present problem, we adopt the molecular dynamics (MD) approach. The liquid (Argon) is confined within two solid (Platinum…
This paper presents experimental, analytical and numerical study of impact perforation of steel plates with the aim to develop the procedures to assess the perforation of steel against tornado-generated missile impact. In the experiment, flat plates of SS400 steel and SUS304 stainless steel were perforated by a square…
For the first time the paper determines thermophysical properties (specific heat capacity, thermal diffusivity, and heat conductivity) of the full-scale corium of the fast energy nuclear reactor within the temperature range from ~30°С to ~400°С. Obtained data are to be used in temperature fields calculations during mo…
In this study, an initial system design method for non-rotationally symmetric imaging systems is introduced. A three-mirror Yolo telescope with small f-number is initially designed and freeform surfaces are applied to improve the resolution.
In this paper a dataset containing biological variables of the water column of several Portuguese reservoirs is analyzed. Hierarchical cluster analysis is used to obtain clusters of phytoplankton variables of the phylum Cyanophyta, with the objective of validating the classification of Portuguese reservoirs previewly…