Numerical simulation of the attosecond quantum sensor at supra-atomic scale level of smart materials

2018 ◽  
Author(s):  
Sergey A. Beznosyuk ◽  
Olga A. Maslova ◽  
Dmitrii Yu. Maksimov ◽  
Mark S. Zhukovsky ◽  
Yulia V. Terentyeva
Keyword(s):  
Numerical Simulation ◽  
Smart Materials ◽  
Atomic Scale ◽  
Scale Level

scholarly journals Decomposition Process of Carboxylate MOF HKUST-1 Unveiled at the Atomic Scale Level

2016 ◽  
Vol 120 (23) ◽  
pp. 12879-12889 ◽  
Author(s):  
Michela Todaro ◽  
Gianpiero Buscarino ◽  
Luisa Sciortino ◽  
Antonino Alessi ◽  
Fabrizio Messina ◽  
...  
Keyword(s):  
Decomposition Process ◽  
Atomic Scale ◽  
Scale Level

Kinetic Path to Fluid Dynamics in Membranes

2002 ◽  
Vol 752 ◽  
Author(s):  
A. ten Bosch
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Molecular Dynamics ◽  
Atomic Scale ◽  
Small Scale ◽  
Pressure Tensor ◽  
Interparticle Interactions ◽  
Membrane Processes ◽  
Average System ◽  
System Properties

ABSTRACTAtomic scale dynamic theories and numerical simulation can explore atomistic processes but the relevant physics must fold atomistic understanding into a mesoscopic formulation in terms of average system properties. Transport equations for the density(or concentration), the flux and the pressure tensor are derived from a microscopic basis which mimics simulation by molecular dynamics. The validity of classical hydrodynamics is explored. The method includes interparticle interactions and small scale variations in time and space of relevance to modeling of membrane processes.

The Study of Magnetorheological Elastomer Based on Natural Rubber (NR)/Polybutadiene Rubber (BR) Hybrid Matrix: Experimental and Numerical Simulation

2019 ◽  
Author(s):  
Xincheng Song ◽  
Wenju Wang ◽  
Fufeng Yang ◽  
Guoping Wang ◽  
Xiaoting Rui
Keyword(s):  
Numerical Simulation ◽  
Natural Rubber ◽  
Smart Materials ◽  
Magnetic Particles ◽  
Mixing Time ◽  
Homogeneous System ◽  
Thermomechanical Analysis ◽  
Magnetorheological Elastomer ◽  
Hybrid Matrix ◽  
Polybutadiene Rubber

Abstract Magnetorheological elastomer (MRE) is a new kind of smart materials whose mechanical properties can be controlled under external magnetic field and it is mainly consist of matrix materials and magnetic particles. In this work, the natural rubber (NR)/polybutadiene rubber (BR) hybrid matrix based MRE were prepared and the compatibility of NR and BR were studied. The hybrid matrix was prepared by physical mixing method. The characterization results showed that the BR had excellent compatibility with NR. The measurement result using rheological showed that the MR effect can be increased to 44.19% by adding of BR. The dynamic thermomechanical analysis showed that the hybrid matrix formed a homogeneous system when the ratio of BR and NR is 1/9 and 3/7. The particles was mixed with matrix using physical technology. The process of mixing was analyzed by numerical simulation. The simulation result showed that the increase of diameter of particles would increase the temperature and velocity of matrix in mixing. The particles was distributed evenly at enough mixing time and the mixing time was decreased with the diameter of particles.

Numerical simulation of hybrid composite shape-memory alloy wire-embedded structures

2011 ◽  
Vol 22 (17) ◽  
pp. 1941-1948 ◽  
Author(s):  
Junghyun Ryu ◽  
Beom-Seok Jung ◽  
Min-Saeng Kim ◽  
JungPyo Kong ◽  
MaengHyo Cho ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Shape Memory ◽  
Smart Materials ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Deformation Behaviour ◽  
Simulation Method ◽  
Linear Deformation ◽  
Reinforced Plastics ◽  
The Matrix

The large recovery force and non-linear deformation behaviour resulting from a change in the temperature in shape-memory alloys (SMAs) make them attractive materials for applications in smart materials and structures, as well as actuators. However, SMAs are limited in their application because they cannot support general loads such as bending or compression. SMA wire-embedded composite materials, where materials such as glass fibre reinforced plastics (GFRPs) are combined with SMAs, are proposed to overcome these limitations. However, the increased stiffness of GFRPs limits the deformation that can be achieved. The inclusion of more compliant materials, such as silicon rubber, into the matrix can improve the achievable deformation, and the characteristics of the resulting hybrid composite can be controlled by varying the conformation of the material. In this study, a numerical simulation method was developed to predict the deformation behaviour of SMA wire-embedded hybrid composites. To verify the simulation procedure, several conformations of SMA wire-embedded hybrid composites were fabricated, and their deformation behaviours were compared with the simulation results. The simulation was then used to achieve a favourable trade-off between the stiffness and the achievable deformation of the structure.

The Study of Magnetorheological Elastomer Based on Natural Rubber (NR)/Thermoplastic Elastomer SEBS Hybrid Matrix: Experimental and Numerical Simulation

2019 ◽  
Author(s):  
Xincheng Song ◽  
Wenju Wang ◽  
Fufeng Yang ◽  
Guoping Wang ◽  
Xiaoting Rui
Keyword(s):  
Numerical Simulation ◽  
Natural Rubber ◽  
Smart Materials ◽  
Magnetic Particles ◽  
Volume Fraction ◽  
Thermoplastic Elastomer ◽  
Multiphase Model ◽  
Hybrid Matrix ◽  
Mr Effect ◽  
Physical Blending

Abstract Magnetorheological elastomers (MREs) is one kind of smart materials which is mainly made up of matrix materials and magnetic particles, their mechanical properties can be controlled under an external magnetic field. Applications of MREs are limited as a result of their poor MR effect and mechanical performance, so enhancing MR effect of MREs are critical for their application. This study aimed to fabricate MREs with high MR effect, the thermoplastic elastomer styrene-ethylene butylene-styrene triblockcopolymer (SEBS) was added into natural rubber (NR) and physical blending technology was used to fabricate hybrid matrix based MREs. The results of dynamic mechanical analysis showed that, with the addition of SEBS, zero modulus of MREs increased from 0.50 MPa to 0.64 MPa and MR effect increased from 28.00% to 43.75%. The multiphase model in ANSYS software was adopted to analysis the process of physical blending. The numerical simulation result showed that it was more easy to mix matrix evenly with the increase of volume fraction of SEBS.

Tribology research trends in Italy

2009 ◽  
Vol 223 (8) ◽  
pp. 1091-1113 ◽  
Author(s):  
E Ciulli
Keyword(s):  
Research Trends ◽  
Atomic Scale ◽  
Wear Behaviour ◽  
Scale Level ◽  
Sliding Bearings ◽  
Practical Applications ◽  
Characterization Of Materials ◽  
Basic Studies ◽  
Research Centres

This article furnishes a survey of recent investigations and of the current tribology research trends in Italy. Several topics related to tribology are investigated in several different departments of universities, research centres, and industries. Some basic studies on friction and lubrication at the atomic-scale level are also reported. A big effort is addressed to researches on surface topography, contact mechanics aspects, and particularly on surface coatings and treatments. Indentation and scratching techniques are used for the characterization of both coatings and bulk materials down to the nanoscale. Mechanical characterization of materials and mat- erial processing involve tribological aspects too. Investigations on the wear behaviour of different materials for applications in the field of biotribology are also being carried out. The increasing interest of the industrial world in tribological problems is producing a lot of collaborations among universities, research centres, and industries. Several tribological components and practical applications are investigated, such as lubricated sliding bearings, gas and magnetic bearings, gears, sealing systems, and automotive and rail components. Investigations are often completed by diagnostic studies for monitoring or maintenance purposes.

scholarly journals ESRF X-rays at the service of industry

2014 ◽  
Vol 70 (a1) ◽  
pp. C591-C591
Author(s):  
Stéphanie Monaco-Malbet ◽  
Emilie Poudevigne ◽  
Michael Sztucki ◽  
Elodie Boller ◽  
Tamzin Lafford ◽  
...  
Keyword(s):  
Smart Materials ◽  
Large Scale ◽  
Business Models ◽  
Critical Role ◽  
Academic Research ◽  
Atomic Scale ◽  
X Rays ◽  
New Materials ◽  
Wide Range ◽  
The Impact

The creation and tailoring of new materials are at the heart of current industry challenges. New materials must meet ever more stringent requirements of performance, whilst fitting into the modern cradle-to-grave cycle of material production, use, and recycling. The properties and function expected of materials depend heavily upon their composition and their micro- or even nano-structure. Their "ultimate" characterisation is possible down to the atomic scale using the tools and techniques of large-scale facilities such as synchrotron X-rays. The European Synchrotron Radiation Facility (ESRF) provides the ability to visualise the atomic, nano-, and macro-structure of a huge range of complex materials, often under processing or end-use conditions and in real time. This capability lends itself to an equally wide range of industrial R&D problems which, in particular, have been adopted by the healthcare industry. Beyond drug discovery and development, the ESRF is also very active in providing analysis for micro- and nano-electronics, energy and smart materials, transport, chemistry and catalysis, engineering materials, and home and body care amongst others. In Europe and worldwide, funding agencies are requesting and demanding a stronger economic return from the significant public investments made in central facilities and this is resulting a gradual but firm pressure for stronger interactions with industry. In this context, new business models are springing to life, with more partnerships, more services, and nimble small start-ups bridging the gap between the oft "ivory tower" nature of research infrastructure and the commercially driven industry world. This presentation will present and discuss the increasingly critical role of such large-scale facilities in delivering ultimate materials characterization for innovative industrial and applied R&D, looking to both the current developments and future possibilities as well as review several examples of partnerships between research and industry and the impact these partnerships have on academic research.

Structure and migration of planar defects in crystals observed in atomic scale

1978 ◽  
Vol 36 (1) ◽  
pp. 284-285 ◽  
Author(s):  
H. Hashimoto ◽  
Y. Sugimoto ◽  
Y. Takai ◽  
H. Endoh
Keyword(s):  
Electron Microscope ◽  
Rotation Angle ◽  
Crystal Surface ◽  
Electron Gun ◽  
Atomic Scale ◽  
Present Observation ◽  
Twist Boundary ◽  
Optical Magnification ◽  
Zinc Crystal ◽  
And Migration

As was demonstrated by the present authors that atomic structure of simple crystal can be photographed by the conventional 100 kV electron microscope adjusted at “aberration free focus (AFF)” condition. In order to operate the microscope at AFF condition effectively, highly stabilized electron beams with small energy spread and small beam divergence are necessary. In the present observation, a 120 kV electron microscope with LaB6 electron gun was used. The most of the images were taken with the direct electron optical magnification of 1.3 million times and then magnified photographically.1. Twist boundary of ZnSFig. 1 is the image of wurtzite single crystal with twist boundary grown on the surface of zinc crystal by the reaction of sulphur vapour of 1540 Torr at 500°C. Crystal surface is parallel to (00.1) plane and electron beam is incident along the axis normal to the crystal surface. In the twist boundary there is a dislocation net work between two perfect crystals with a certain rotation angle.

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