Water absorption in a glass/mica/epoxy composite. II: Field distribution and diagnostic in a stator bar geometry
International audience
Materials Literature
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Direct and indirect CeO2 nanoparticles toxicity for Escherichia coli and Synechocystis
International audience
Influence of Electrification of Droplet on Hydrophobicity Reduction of Polymer Material during a Dynamic Drop Test
The dynamic drop test was proposed as a method to evaluate hydrophobicity reduction of polymer materials. In this test, the formation change of a water channel was confirmed, and thereafter, the remained droplets and the dropped droplets on the sampled surface were repulsed each other. The distributions of electrifica…
A Numerical Simulation of Crushing in Flexible Pipes
Flexible pipes are subjected to compressive loading when they are being launched. A set of shoes working together in the launching mechanism compress a region of the pipe in order to provide enough friction for sustaining its own weight during launching. This loading should be applied carefully, once the pipe may not…
Concentration Dependence of Crystalline Poly(L-lactide) Prepared by Freeze-drying Solutions
Poly(L-lactide) was freeze-dried from p-xylene solutions with varying concentrations. The samples were characterized by differential scanning calorimetry. It was found that the sample produced from the dilute solution exhibited higher non-isothermal crystallization temperature and faster crystallization rate. There wa…
Fabrication of Microcellular HDPE Foams in a Sub-Critical CO 2 Process
In this paper processing conditions are presented to fabricate HDPE foams with a microcellular structure. The conventional microcellular foams are normally produced by heating a gas-saturated thermoplastic to a foaming temperature near the glass transition of the gas-polymer system. Efforts to foam HDPE in the convent…
Phase field modelling of grain growth in polycrystalline material
Based on the two-parameter phase field model of polycrystalline, the grain growth in polycrystalline material during isothermal holding is simulated by using the adaptive finite element method. The calculated results demonstrates that the cusp grain boundaries are inclined to planar and some small grains coarsen into…
Molecular Simulation on the Glass Transition of Polypropylene
Molecular dynamics methods have been used to investigate the glass transition of three different configuration of polypropylene(isotactic,syndiotactic,atactic).The glass transition temperature has been determined as the temperature marking the discontinuity in slope of the volume-temperature(V-T) simulation data in co…
Using simulation for intervention design in radiating environment: first evaluation of NARVEOS
Interventions design in radiating environment must bring answers to technical and economical constraints on one hand and, on the other hand, to radiation protection principles and rules. Simulation is a key point for a good understanding of the scene and for testing hypothesis. The paper presents how a simulation tool…
Methods of study on sound cavitation
A brief review is given of acoustic cavitation,including research methods and recent progress.The paper presents novel application of cavitation in gene transfer.
Lattice computation by the least square method
The least square method is an essential method to compute lattice parameters with high precision. The Cohen's least square method with or without a corrective function of diffraction angle is discussed.The normal equations of seven crystal systems,formulas to compute lattice parameters and estimate error are given.The…
Mechanical Performance of Glass Fiber Reinforced Magnesia-Phosphate Cements in Accelerated Aging
The effect of glass fiber textile on flexural strength of MPC mortar specimens containing glass fiber reinforcement and change of its flexural strength after accelerated aging were researched.The tensile rupture load of glass fiber before and after accelerated aging and pH value of hardened MPC paste with different ag…
NUMERICAL SIMULATION OF THE PENETRATION OF A SPHERICAL-NOSED 4340 STEEL LONG ROD INTO SEMI-INFINITE 6061-T6511 ALUMINUM TARGETS
The numerical simulation of the penetration of a spherical-nosed 4340 Steel Long Rod into Semi-infinite 6061-T6511 Aluminum Targets is performed with ALE method and Steinberg's constitutive model using the ANSYS/LS-DYNA finite element code. It transpires that the state of the steel long rod penetrator changes with inc…
Prospect of High Voltage Long Distance Compressed-air Insulated Transmission Lines
Traditional overhead wires are easy to be affected by natural environment.Cable is susceptible to the aging of dielectric and as the manufacturing process constraints,cable's maximum operating voltage and transmission capacity both have reached technical limits.We put forward a new upgrade transmission way of compress…
Planar left-handed metamaterials based on double split-ring resonator pairs
By theoretical analysis and experimental simulation，planar left-handed metamaterials using double split-ring resonator pairs are studied in this paper. Simultaneous negative permittivity and permeability are described and explained by using equivalent circuit theory. Moreover，double split-ring resonator pairs used in…
Strain Rate Induced Strength Enhancement in Concrete: Much ado about Nothing?
Summary: When concrete impact and penetration simulations are discussed, the question of increased strength due to high strain rates arises. Many concrete material modelers cite and use the seminal work of Bischoff and Perry (1991), or the widely accepted standard reference for concrete Comite EuroInternational du Bet…
Nuclear Hydrogen Production by High-Temperature Electrolysis
Hydrogen and nuclear energies are expected as excellent energy resources and are environmentally friendly owing to the absence of emission of carbon dioxide. Toshiba has been developing the high-temperature steam electrolysis technology using solid-oxide cells for hydrogen production by nuclear energy. This paper show…
Non-grounded Surface Electroprospecting Technique
The oldest MT technique (MVP) has been given new life with the fifth-generation of multifunctional equipment and precision tripods for magnetic sensor installation. The relatively recent many-3H technique brings new advantages to electroprospecting work i
Electronic properties and microstructures of amorphous SiCN ceramics derived from polymer precursors
Polymer-derived ceramics (PDCs) are a new class of high-temperature materials synthesized by thermal decomposition of polymeric precursors. These materials possess many unique features as compared with conventional ceramics synthesized by powder metallurgy based processing. For example, PDCs are neither amorphous nor…
Effect of Inorganic (Nano)fillers on the UV Barrier Properties, Photo and Thermal Degradation of Polypropylene Fibres
Barrier properties against ultraviolet radiation and the light stability of polypropylene (PP) fibres are very important for light-weight summer fabrics as well as for leisure and sport wear. What is more, the thermal stability of PP composites is required in the spinning process and in the thermal treatment of fibres…