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Online since: March 2023
Authors: Rachid Tiberkak, Madjid Ezzraimi, Mohammed Essidik Lazar, Yasser Chiker, Morad Bachene, Said Rechak
Due to their high mechanical properties coupled with lightweight, FG-CNTRCs are mainly used in the aerospace industry and in advanced engineering applications.
In this fascinating area of research and innovation, Mohan et al [2] developed a way to improve the mechanical properties of polymeric devices, fabricated by additive manufacturing, by combining electrospinning and stereolithography in a single automated process.
Theoretical Formulation and Field Equations The distribution of carbon nanotubes through the thickness direction of the composite plate is known as the uniform distribution of nanotubes (UD), while the dispersed CNTs in patterns are known as FG-X, FG-O, FG-A and FG-V. 2.1 Mechanical proprieties of CNTRC plate In this study, the rule of mixture is used to calculate the material properties of carbon nanotubes (CNTs).
The mechanical properties of the CNTs and the matrix are: CNTs: , , , and .
Eltaher, Free Vibration of FG-CNTRCs Nano-Plates/Shells with Temperature-Dependent Properties, Mathematics. 10 (2022) 583
In this fascinating area of research and innovation, Mohan et al [2] developed a way to improve the mechanical properties of polymeric devices, fabricated by additive manufacturing, by combining electrospinning and stereolithography in a single automated process.
Theoretical Formulation and Field Equations The distribution of carbon nanotubes through the thickness direction of the composite plate is known as the uniform distribution of nanotubes (UD), while the dispersed CNTs in patterns are known as FG-X, FG-O, FG-A and FG-V. 2.1 Mechanical proprieties of CNTRC plate In this study, the rule of mixture is used to calculate the material properties of carbon nanotubes (CNTs).
The mechanical properties of the CNTs and the matrix are: CNTs: , , , and .
Eltaher, Free Vibration of FG-CNTRCs Nano-Plates/Shells with Temperature-Dependent Properties, Mathematics. 10 (2022) 583
Online since: June 2012
Authors: Kye Bock Lee, Seok Ho Rhi, Dong Ryun Shin, Ki Woo Lee, Wook Hyun Lee, Chan Chul Jang, Won Gook Lee, Nak Keun Kim
It takes advantage of the special properties of beta-alumina, which is an excellent conductor of alkali metal ions but a bad conductor of electrons, which can be called as an electrolyte.
Also various parameters such as BASE tube, evaporator and condenser and artery cable geometries were tested to find the optimum design factors of AMTEC.
The design variables of BASE tube such as diameter, length, and porosity affect for the AMTEC performance.
In the present study, the nominal operation point of the AMTEC/TE converters is decided various factors based on the system geometrical dimensions of components such as evaporator, BASE tube, and condenser plate and cable artery.
Also many parameters were tested to find the optimum design factors of AMTEC.
Also various parameters such as BASE tube, evaporator and condenser and artery cable geometries were tested to find the optimum design factors of AMTEC.
The design variables of BASE tube such as diameter, length, and porosity affect for the AMTEC performance.
In the present study, the nominal operation point of the AMTEC/TE converters is decided various factors based on the system geometrical dimensions of components such as evaporator, BASE tube, and condenser plate and cable artery.
Also many parameters were tested to find the optimum design factors of AMTEC.
Online since: January 2012
Authors: H.R. Sinning, Werner Riehemann, G. Vidrich
Mechanical Spectroscopy of Annealing Effects in Electrodeposited Nickel/Ceramic Nanocomposites
H.
Such nanostructured nickel is of interest both for fundamental studies, e.g. of plasticity and deformation mechanisms [10,11], and for engineering applications based on generally improved properties.
The experimental evidence available to date on this particular aspect will now be considered for both quantities separately before being discussed together with other properties.
Apparently, the difference between both kinds of nanoparticles affects only the magnitude of the annealing effect on Young’s modulus but not its onset temperature.
Although the microstructural development during annealing of the present materials has not been studied by direct microscopic methods, some conclusions can be drawn from our present results together with previous studies of other properties.
Such nanostructured nickel is of interest both for fundamental studies, e.g. of plasticity and deformation mechanisms [10,11], and for engineering applications based on generally improved properties.
The experimental evidence available to date on this particular aspect will now be considered for both quantities separately before being discussed together with other properties.
Apparently, the difference between both kinds of nanoparticles affects only the magnitude of the annealing effect on Young’s modulus but not its onset temperature.
Although the microstructural development during annealing of the present materials has not been studied by direct microscopic methods, some conclusions can be drawn from our present results together with previous studies of other properties.
Online since: April 2013
Authors: Sulaiman Hasan, Mohd Hilmi Othman, Muhammad Farid Shaari
Clamping mechanism had several designs, either mechanical (toggle), hydraulic or hydro-mechanical.
Meanwhile, Åkesson et al. [5] has performed the analysis of dynamic properties of boring bars concerning different clamping conditions.
In their research, they have focused on the clamping properties that influence on the dynamic properties of clamped boring bars [5].
Furthermore, the hydraulic cylinder has been use for a long period of time which affects its efficiency to produce the value of force that it should be.
[5] Henrik Åkesson, Tatiana Smirnova, Lars Håkansson, Analysis of dynamic properties of boring bars concerning different clamping conditions, Mechanical Systems and Signal Processing, 23- 8, (2009) 2629-2647
Meanwhile, Åkesson et al. [5] has performed the analysis of dynamic properties of boring bars concerning different clamping conditions.
In their research, they have focused on the clamping properties that influence on the dynamic properties of clamped boring bars [5].
Furthermore, the hydraulic cylinder has been use for a long period of time which affects its efficiency to produce the value of force that it should be.
[5] Henrik Åkesson, Tatiana Smirnova, Lars Håkansson, Analysis of dynamic properties of boring bars concerning different clamping conditions, Mechanical Systems and Signal Processing, 23- 8, (2009) 2629-2647
Online since: February 2012
Authors: Asaad A. Abdullah, Usama J. Naeem, Cai Hua Xiong
The surface roughness is often the most important feature in process engineering given the decisive influence on the surfaces of mechanical and physical properties of the machined part. [1].
The overall capacity of the network, In fact, depends on three factors.
Experimental and Analysis of Data The trial was conducted to assess the effect of cutting process factors in the surface roughness.
By using the properties of the linear and quadratic order functions, the best model of the surface roughness was achieved.
To verify the influence of cutting factors (cutting speed, cutting depth, and feed rate) on the surface roughness of the workpiece, and to determine the best factors to get the lower value of surface roughness, by using ANOVA, the signal _ to _ noise ratio (S/N), and Taguchi’s optimization methods.
The overall capacity of the network, In fact, depends on three factors.
Experimental and Analysis of Data The trial was conducted to assess the effect of cutting process factors in the surface roughness.
By using the properties of the linear and quadratic order functions, the best model of the surface roughness was achieved.
To verify the influence of cutting factors (cutting speed, cutting depth, and feed rate) on the surface roughness of the workpiece, and to determine the best factors to get the lower value of surface roughness, by using ANOVA, the signal _ to _ noise ratio (S/N), and Taguchi’s optimization methods.
Online since: April 2011
Authors: Elisabetta Ceretti, Claudio Giardini, Aldo Attanasio, Cristian Cappellini
Indeed, the residual stress distribution affects fatigue life, corrosion resistance and other functional aspects of the workpiece.
However, modeling these types of operations by FEM has some limitations principally due to the high computational time, the lack in the material properties, as flow stress functions at very high strain rate and temperature, and in the definition of heat transfer and thermal exchange coefficients between workpiece and tool.
In the first phase the IL solver is utilized for reaching the mechanical steady state.
All the other thermal (thermal expansion, thermal conductivity, specific heat, …) and mechanical (density, Young’s modulus, Poisson ratio, …) material properties were set according to Deform 3D material database.
The friction factor m was set equal to 0.82 representing dry conditions according to Ceretti et al. [20].
However, modeling these types of operations by FEM has some limitations principally due to the high computational time, the lack in the material properties, as flow stress functions at very high strain rate and temperature, and in the definition of heat transfer and thermal exchange coefficients between workpiece and tool.
In the first phase the IL solver is utilized for reaching the mechanical steady state.
All the other thermal (thermal expansion, thermal conductivity, specific heat, …) and mechanical (density, Young’s modulus, Poisson ratio, …) material properties were set according to Deform 3D material database.
The friction factor m was set equal to 0.82 representing dry conditions according to Ceretti et al. [20].
Online since: August 2005
Authors: V.A. Litvinenko
Introduction
The advantage of abrasive treatment in magnetic field is a complete mechanization of finishing
operations of details with complicated contour such as rotary bodies made of materials with
different physical and mechanical properties.
Adjustment parameters and treatment regimes are the factors determining forming regularity in the process of magnetic-abrasive finishing.
Regime factors include: ratio of detail speed and polarized rotating electromagnets, value of magnetic inductivity in the working clearance.
Factors characterizing cutting properties of magnetic-abrasive powder, its ability to self-sharpening, accuracy of the pattern original form also influence on the accuracy.
Physical and mechanical properties of materials surface layer after MAF.
Adjustment parameters and treatment regimes are the factors determining forming regularity in the process of magnetic-abrasive finishing.
Regime factors include: ratio of detail speed and polarized rotating electromagnets, value of magnetic inductivity in the working clearance.
Factors characterizing cutting properties of magnetic-abrasive powder, its ability to self-sharpening, accuracy of the pattern original form also influence on the accuracy.
Physical and mechanical properties of materials surface layer after MAF.
Online since: June 2015
Authors: B. Vijaya Ramnath, C. Elanchezhian, P. Kandeepa Thondaiman, R. Saisundararam, V. Ramanan, C.S. Siddarth, V. Maurya Sundar, S. Mohammed Sadiq
In fact, the undesirable low mechanical properties microstructure resulting from melting and re-solidification is absent in FSW welds leading to improved properties in some alloys [7-8].
Aluminium and magnesium are most often welded using alternating current, but the use of direct current is also possible, depending on the properties desired.
Here the factors influencing the weld strength are Rotational speed, Welding speed and axial load, we have considered three factor levels and by taguchi principle these parameters are converted into L9 orthogonal array.
Nogi, Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminium alloy.
Jung, The improvement of mechanical properties of friction stir welded A356 Al alloy, Mater.Sci.Eng.A355 (2003) 154-159
Aluminium and magnesium are most often welded using alternating current, but the use of direct current is also possible, depending on the properties desired.
Here the factors influencing the weld strength are Rotational speed, Welding speed and axial load, we have considered three factor levels and by taguchi principle these parameters are converted into L9 orthogonal array.
Nogi, Tensile properties and fracture locations of friction-stir-welded joints of 2017-T351 aluminium alloy.
Jung, The improvement of mechanical properties of friction stir welded A356 Al alloy, Mater.Sci.Eng.A355 (2003) 154-159
Online since: June 2015
Authors: Petr Vladimirovich Burkov, Ruslan Khusenovich Ageev, Svetlana Petrovna Burkova
A simulation of the drilling process helps to determine all negative factors affecting it and select the most suitable tools.
Autodesk Inventor is 3D mechanical CAD design software developed by the Company Autodesk, USA, for creating 3D digital prototypes of industrial products.
The real mechanical properties of soil, the borehole diameter and depth, and PDC bit pressure exerted on the borehole were accepted for the simulation.
Autodesk Inventor is 3D mechanical CAD design software developed by the Company Autodesk, USA, for creating 3D digital prototypes of industrial products.
The real mechanical properties of soil, the borehole diameter and depth, and PDC bit pressure exerted on the borehole were accepted for the simulation.
Online since: January 2006
Authors: Yih Lin Cheng, Ying Wei Lee
Mani and Bhattacharya evaluated the properties of injection molded blends of
starch and polycaprolactone (PCL) [2].
Temperature properties of PLA3001D and Biomax WB200 Tm (oC) Tg (oC) Suggested processing temperature ( oC) PLA3001D 200 105 140~215 Biomax WB200 200 27 180~225 Experiment Design.
The dimension of the specimen (Fig. 1) wais based on ASTM D638-2a-type IV, the standard testing method for tensile properties of plastic, since tensile tests will be conducted in the future.
L9 orthogonal array Factors No.
Other factors are pooled and treated as experimental errors.
Temperature properties of PLA3001D and Biomax WB200 Tm (oC) Tg (oC) Suggested processing temperature ( oC) PLA3001D 200 105 140~215 Biomax WB200 200 27 180~225 Experiment Design.
The dimension of the specimen (Fig. 1) wais based on ASTM D638-2a-type IV, the standard testing method for tensile properties of plastic, since tensile tests will be conducted in the future.
L9 orthogonal array Factors No.
Other factors are pooled and treated as experimental errors.