Materials Literature
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The results of the influence of preliminary thermal cyclic deformation and subsequent hardening heat treatment on the microstructure and mechanical properties of hot-rolled sheet steel 10 are presented. It is shown that the use of preliminary thermal cyclic deformation of the steel 10 stock material results in a fine-…
The purpose of this research was to investigate the changing patterns of the 3D rail residual stress as it accumulates on different portions of the rail manufacturing process. These patterns are of interest for manufacturers and railroad companies but also could serve as initial fields for various further numerical an…
Failure of weld joints under single and cyclic pulsating loading conditions is under consideration. A weld joint is modeled by three-layer composite. Stepwise propagation of the internal I mode crack under cyclic loading is investigated. Delamination of bimaterial composed of two structured materials is considered whe…
Silica and carbon black have been widely used as the main reinforcing fillers for improving the properties of natural rubber (NR). In a silica-filled rubber compound, it is known that the low compatibility between NR and silica affects the mechanical properties of rubber products. In order to overcome this drawback, t…
The work presents studies of a new ceramic-metallic material. The base is a ZrO2-Mo cermet which is modified with metallic Mo or Mo85Re15 alloy coating. The structure and microstructure of Mo85Re15 alloy powders and the composite were characterized. The annealing procedure was found to influence phase composition of p…
This paper presents a new energy approach based on the concept of a volume stain-energy-density factor useful to deal with the general problem of brittle fracture for sharp V-notches under mixed-mode I and II. The basic assumption is that the fracture occurs when the volume strain energy density factor arrive at its c…
A micromechanical model for finite single crystal plasticity was introduced by Kochmann & Hackl (2011 Contin. Mech. Thermodyn. 23, 63–85 ( doi:10.1007/s00161-010-0714-5 )). This model is based on thermodynamic variational principles and leads to a non-convex variational problem. Based on the Lagrange functional, an in…
In order to study the influence of freezing and thawing on the dynamic behavior of ceramsite concrete, specimens with four kinds of ceramsite volume fraction including 0%, 15%, 30% and 45% which subjected to 0, 10, 20, 30 and 40 cycles of freezing and thawing respectively, are tested by means of the Spilt Hopkinson Pr…
In this paper, yield surface distortion was studied by considering the combination of nonlinear kinematic hardening model of Chaboche and a new anisotropic continuum damage evolution model. The constitutive relations for anisotropic damage of elastoplasic materials were developed based on irreversible thermodynamics.…
The present paper addresses the continuum model describing deformation and accumulation of microdamages in electroelastic materials based on the generalized Eshelby principle. The microdamageability is considered as a process of appearance of flat elliptic or circular microcracks randomly dispersed over volume, the co…
It has been widely accepted that silicene is a topological insulator, and its gap closes first and then opens again with increasing electric field, which indicates a topological phase transition from the quantum spin Hall state to the band insulator state. However, due to the relatively large atomic spacing of silicen…
Highly graphitized nucleophilic group functionalized Multiwall carbon nanotubes are utilized to fabricate PDMS/FMWCNTs nanocomposites with low weight fraction (0.1 wt%). The effect of solvents on dispersion of FMWCNTs is studied. THF shows higher dispersion power in comparison with chloroform. The dielectric constant…
Les diatomées provenant de 140 mares de deux régions de France, le plateau calcaire de la Beauce au nord et la région de sable et d'argile d'Orléans et de la Sologne au sud, ont été analysées afin d'évaluer l'influence de la géologie régionale, de l'aménagement du territoire et des substrats colonisés. Des mares perma…
This study aims to describe the response of a Hydrogen solid storage cylindrical tank, which is filled by a metal hydride alloy (FeTi-X) and subjected to several types of solicitations, such as: pressure, external temperature, and inlet and outlet flow. The model used in this work is classified as a macro scale model…
A least-squares procedure is proposed for the reconstruction of optical parameters of bilayer structures. The objective function is constructed using experimental and calculated data on the reflectance of a coupling prism. A structure consisting of two different silicon oxynitride films on a silicon substrate is studi…
Felix Borrnert, Heiko Muller, Martin Linck, Alexander Horst, Angus I Kirkland, Bernd Buchner, Hannes Lichte; Approaching the “Lab in the Gap”: First Result
Investigation on macrosegregation and dendrite morphology during directional solidification of Al-Cu hypereutectic alloys under a strong magnetic field, Li, Xi, Du, DaFan, Fautrelle, Yves, Ren, ZhongMing, Moreau, Rene
The elastic hysteresis and residual deflections of samples made of steel 20, which correspond to the model of a thin rigid round plate pinched over the contour, have been investigated. It has been shown that annealing of the samples at 470 and 670 K weakly affects these characteristics, while after complete annealing…
A new approach has been proposed to the problem of dynamical scattering of spatially limited X-ray beams. The dynamical diffraction theory in a crystal with the lateral modulation of incident and reflected X-ray waves has been developed within this approach. The unusual angular distribution of the diffracted intensity…
The effect of temperature within the range 379–1026 K on the specific heat of thulium orthovanadate TmVO4 obtained by solid-phase synthesis was studied by differential scanning calorimetry. From the experimental dependence C p = f(T), which is described by the equation C p = (136.46±0.47) + (15.5±0.5) × 10−3 T - (17.5…