An investigation of the mechanoluminescence of composite materials based on a polymer and a phosphor powder excited by the action of a mechanical striker, stylus and laser pulse

2020 ◽  
Vol 6 ◽  
pp. 62-68
Author(s):  
A.F. Banishev ◽  
◽  
A.A. Banishev ◽  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Polymethyl Methacrylate ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Composite Layer ◽  
Laser Pulses ◽  
Visible Spectral Region ◽  
Mechatronic Systems ◽  
Short Laser Pulses

The mechanoluminescence of the composite materials based on polymethyl-methacrylate and fine-dispersed powders of Sr4Al14O25:(Eu2+,Dy3+) phosphor with a centrosymmetric crystal structure of microcrystals and SrAl2O4:(Eu2+, Dy3+) phosphor with noncentrosymmetric crystalline structure were investigated. To study of mechanoluminescence, the composite layer with a thickness of ~250-300 μm was deposited on the surface of polymethyl-methacrylate substrate transparent in the visible spectral region. The mechanoluminescence of the composite layer was excited by the action of a mechanical striker, short laser pulses in air and water, and dynamic pressure of the stylus sliding over the surface of the mechanoluminescent layer. It is shown that the composite material based on a polymer and SrAl2O4:(Eu2+,Dy3+) powder with a noncentrosymmetric crystal lattice has a pronounced mechanoluminescence, while the composite material with Sr4Al14O25:(Eu2+,Dy3+) powder does not exhibit of the mechanoluminescent properties. It was shown that the excitation of mechanoluminescence in water begins at a much lower power density of the laser pulses than in air. The produced composite layer is shown to exhibit a high efficiency of “mechanooptical” transformation and can be used for recording and visualizing mechanical effects in mechatronic systems.

scholarly journals Механолюминесценция тонкого слоя композиционного материала, созданного путем внедрения микрочастиц люминофора SrAl-=SUB=-2-=/SUB=-O-=SUB=-4-=/SUB=- : (Eu-=SUP=-2+-=/SUP=-, Dy-=SUP=-3+-=/SUP=-) в поверхностный слой полиметилметакрилата

2019 ◽  
Vol 45 (10) ◽  
pp. 3
Author(s):  
А.Ф. Банишев ◽  
А.А. Банишев
Keyword(s):  
Laser Radiation ◽  
Liquid Phase ◽  
Methyl Methacrylate ◽  
Power Density ◽  
Photoluminescence Spectrum ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Composite Layer ◽  
Layer Surface ◽  
Kinetics Of

AbstractA mechanoluminescent composite layer at the surface of poly(methyl methacrylate) (PMMA) was obtained by liquid-phase incorporation of SrAl_2O_4 : (Eu^2+, Dy^3+) phosphor microparticles into the polymer. The photoluminescence spectrum and kinetics of emission from the composite layer have been studied as dependent on the power density of exciting laser radiation pulses. The mechanoluminescence of the composite layer has been studied under the effect of short acoustic pulses and dynamic pressure of a solid stylus sliding over the composite layer surface. A possible mechanism of mechanoluminescence excitation is discussed. It is established that the obtained composite layer is characterized by high efficiency of the mechano-optical conversion and can be used for the detection and visualization of mechanical stresses.

scholarly journals Laser-induced cratering of a 3DCC material at mesoscale: Experiments and simulations

2018 ◽  
Vol 183 ◽  
pp. 01028
Author(s):  
Vincent Jaulin ◽  
David Hébert ◽  
Bertrand Aubert ◽  
Jean-Luc Rullier ◽  
Frédéric Malaise ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Dynamic Behaviour ◽  
Focal Spot ◽  
Dynamic Pressure ◽  
Dynamic Strength ◽  
Mesoscopic Scale ◽  
Spot Diameter ◽  
Laser Facility ◽  
Focal Spot Diameter

This study concerns the damaging of a 3-Dimension Carbon/Carbon (3DCC) composite material under dynamic loading. Experiments were performed with a laser facility delivering energies between 13 and 40 J with 100 nanoseconds pulse duration. The focal spot diameter was 250 μm, leading to dynamic pressure up to 10 GPa. The focal spot being smaller than the size of the composite components, it allows us to study the dynamic behaviour of the material at mesoscopic scale. The dynamic process of this cratering is then investigated via 3D numerical simulations, and a Johnson-Holmquist model is proposed. It appears that comparison of simulations with experimental results is useful to identify the dynamic strength of individual components of composite materials.

Mechanoluminescence of a composite based on polymethylmethacrylate and fine-disperse powder of phosphor excited by short acoustic pulses and dynamic action of the stylus

2019 ◽  
Vol 33 (30) ◽  
pp. 1950366
Author(s):  
A. F. Banishev ◽  
A. A. Banishev
Keyword(s):  
Surface Layer ◽  
Liquid Phase ◽  
High Efficiency ◽  
Dynamic Pressure ◽  
Composite Layer ◽  
Disperse Powder ◽  
Layer Surface ◽  
Dynamic Action ◽  
Optical Transformation ◽  
Fine Disperse

A composite mechanoluminescent layer has been produced on the surface of polymethylmethacrylate by liquid-phase embedding of [Formula: see text] phosphor microparticles into the polymethylmethacrylate surface layer. The photoluminescence and mechanoluminescence of the obtained layer have been investigated. The mechanoluminescence was excited by the short acoustic pulses and by the dynamic pressure of the stylus sliding over the mechanoluminescent layer surface. A possible mechanism of mechanoluminescence excitation is under discussion. The produced composite layer is shown to exhibit high efficiency of “mechano-optical” transformation.

Study of the Composite Materials Optimal Structure Containing a Hollow Aluminum and Silica Microsphere Dependence on Humidity

2020 ◽  
Vol 12 ◽  
Author(s):  
Alexandra Atyaksheva ◽  
Yermek Sarsikeyev ◽  
Anastasia Atyaksheva ◽  
Olga Galtseva ◽  
Alexander Rogachev
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Strength Function ◽  
Theory And Practice ◽  
Optimal Structure ◽  
Optimal Size ◽  
Structure And Properties ◽  
Power Functions ◽  
Silica Microsphere ◽  
Heat Engineering

Aims:: The main goals of this research are exploration of energy-efficient building materials when replacing natural materials with industrial waste and development of the theory and practice of obtaining light and ultra-light gravel materials based on mineral binders and waste dump ash and slag mixtures of hydraulic removal. Background.: Experimental data on the conditions of formation of gravel materials containing hollow aluminum and silica microsphere with opportunity of receipt of optimum structure and properties depending on humidity with the using of various binders are presented in this article. This article dwells on the scientific study of opportunity physical-mechanical properties of composite materials optimization are considered. Objective.: Composite material contains hollow aluminum and silica microsphere. Method.: The study is based on the application of the method of separation of power and heat engineering functions. The method is based on the use of the factor structure optimality, which takes into account the primary and secondary stress fields of the structural gravel material. This indicates the possibility of obtaining gravel material with the most uniform distribution of nano - and microparticles in the gravel material and the formation of stable matrices with minimization of stress concentrations. Experiments show that the thickness of the cement shell, which performs power functions, is directly related to the size of the raw granules. At the same time, the thickness of the cement crust, regardless of the type of binder, with increasing moisture content has a higher rate of formation for granules of larger diameter. Results.: The conditions for the formation of gravel composite materials containing a hollow aluminosilicate microsphere are studied. The optimal structure and properties of the gravel composite material were obtained. The dependence of the strength function on humidity and the type of binder has been investigated. The optimal size and shape of binary form of gravel material containing a hollow aluminosilicate microsphere with a minimum thickness of a cement shell and a maximum strength function was obtained. Conclusion.: Received structure allows to separate power and heat engineering functions in material and to minimize the content of the excited environment centers.

scholarly journals Production of ion beams in high-power laser–plasma interactions and their applications

2004 ◽  
Vol 22 (1) ◽  
pp. 19-24 ◽  
Author(s):  
F. PEGORARO ◽  
S. ATZENI ◽  
M. BORGHESI ◽  
S. BULANOV ◽  
T. ESIRKEPOV ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Medical Physics ◽  
Ion Beam ◽  
Laser Pulses ◽  
Ion Beams ◽  
Laser Plasma Interactions ◽  
Physical Mechanisms ◽  
Short Laser Pulses ◽  
Laser Pulse Intensity ◽  
Target Design

Energetic ion beams are produced during the interaction of ultrahigh-intensity, short laser pulses with plasmas. These laser-produced ion beams have important applications ranging from the fast ignition of thermonuclear targets to proton imaging, deep proton lithography, medical physics, and injectors for conventional accelerators. Although the basic physical mechanisms of ion beam generation in the plasma produced by the laser pulse interaction with the target are common to all these applications, each application requires a specific optimization of the ion beam properties, that is, an appropriate choice of the target design and of the laser pulse intensity, shape, and duration.

Hierarchical ZSM-22/PHTS composite material and its hydro-isomerization performance in hydro-upgrading of gasoline

2021 ◽  
Author(s):  
Jiyuan Fan ◽  
Chengkun Xiao ◽  
Jinlin Mei ◽  
Cong Liu ◽  
Aijun Duan ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Impregnation Method ◽  
Molar Ratios

CoMo series catalysts based on ZSM-22/PHTS (ZP) composite materials with different SiO2/Al2O3 molar ratios were prepared via the impregnation method. The properties of the ZP material and the corresponding catalysts...

scholarly journals Acoustic Emission and K-S Metric Entropy as Methods for Determining Mechanical Properties of Composite Materials

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 145
Author(s):  
Lesław Kyzioł ◽  
Katarzyna Panasiuk ◽  
Grzegorz Hajdukiewicz ◽  
Krzysztof Dudzik
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Composite Material ◽  
Composite Materials ◽  
Testing Machine ◽  
Measurement Data ◽  
Entropy Method ◽  
Displacement Sensor ◽  
Metric Entropy ◽  
Plastic Phase

Due to the unique properties of polymer composites, these materials are used in many industries, including shipbuilding (hulls of boats, yachts, motorboats, cutters, ship and cooling doors, pontoons and floats, torpedo tubes and missiles, protective shields, antenna masts, radar shields, and antennas, etc.). Modern measurement methods and tools allow to determine the properties of the composite material, already during its design. The article presents the use of the method of acoustic emission and Kolmogorov-Sinai (K-S) metric entropy to determine the mechanical properties of composites. The tested materials were polyester-glass laminate without additives and with a 10% content of polyester-glass waste. The changes taking place in the composite material during loading were visualized using a piezoelectric sensor used in the acoustic emission method. Thanks to the analysis of the RMS parameter (root mean square of the acoustic emission signal), it is possible to determine the range of stresses at which significant changes occur in the material in terms of its use as a construction material. In the K-S entropy method, an important measuring tool is the extensometer, namely the displacement sensor built into it. The results obtained during the static tensile test with the use of an extensometer allow them to be used to calculate the K-S metric entropy. Many materials, including composite materials, do not have a yield point. In principle, there are no methods for determining the transition of a material from elastic to plastic phase. The authors showed that, with the use of a modern testing machine and very high-quality instrumentation to record measurement data using the Kolmogorov-Sinai (K-S) metric entropy method and the acoustic emission (AE) method, it is possible to determine the material transition from elastic to plastic phase. Determining the yield strength of composite materials is extremely important information when designing a structure.

scholarly journals Development of Detailed FE Numerical Models for Assessing the Replacement of Metal with Composite Materials Applied to an Executive Aircraft Wing

Aerospace ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 178
Author(s):  
Valerio Acanfora ◽  
Roberto Petillo ◽  
Salvatore Incognito ◽  
Gerardo Mario Mirra ◽  
Aniello Riccio
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Numerical Model ◽  
Numerical Models ◽  
Structural Performance ◽  
Aircraft Wing ◽  
Resin Infusion ◽  
Effectiveness Analysis ◽  
Liquid Resin Infusion ◽  
Process Constraints

This work provides a feasibility and effectiveness analysis, through numerical investigation, of metal replacement of primary components with composite material for an executive aircraft wing. In particular, benefits and disadvantages of replacing metal, usually adopted to manufacture this structural component, with composite material are explored. To accomplish this task, a detailed FEM numerical model of the composite aircraft wing was deployed by taking into account process constraints related to Liquid Resin Infusion, which was selected as the preferred manufacturing technique to fabricate the wing. We obtained a geometric and material layup definition for the CFRP components of the wing, which demonstrated that the replacement of the metal elements with composite materials did not affect the structural performance and can guarantee a substantial advantage for the structure in terms of weight reduction when compared to the equivalent metallic configuration, even for existing executive wing configurations.

Mechanisms of nanoparticle formation by short laser pulses

2007 ◽  
Author(s):  
Tatiana E. Itina ◽  
Mikhail E. Povarnitsyn ◽  
Karine Gouriet ◽  
Sylvie Noël ◽  
Jörg Hermann
Keyword(s):  
Laser Pulses ◽  
Nanoparticle Formation ◽  
Short Laser Pulses
Sign in / Sign up

Export Citation Format

Share Document