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Online since: August 2013
Authors: C.D. Naiju, S. Sathyanarayanan, K. Annamalai, Mohammed Shejeer
AISI 4135-low alloy steel material properties are considered and linear elastic finite element analysis and fatigue life analysis were carried out.
The S-N curve are predicted according to the material property, experimental analysis are performed on both constant and variable amplitude loading and their results are compared [6].
Gear Modelling and Finite Element Simulation Girth gear of AISI 4135-low alloy steel material is used to drive a kiln system in a cement factory, is modelled along with two support pinions of the same material and various factors affecting the system’s failure are analysed.
Table 1 Input parameters for meshing Physics Preference Mechanical Advanced Size Function OFF Relevance Center Fine Element Size 50 mm Smoothing High Transition Fast Span Angle Center Medium Edge Element Length 3 mm Number of Nodes 2400729 Number of Elements 1596038 Fig. 1 Meshed structure Constraints and Boundary Conditions In this analysis cylindrical support has been applied to interior cylindrical faces of the Girth gear and the two pinions.
The S-N curve are predicted according to the material property, experimental analysis are performed on both constant and variable amplitude loading and their results are compared [6].
Gear Modelling and Finite Element Simulation Girth gear of AISI 4135-low alloy steel material is used to drive a kiln system in a cement factory, is modelled along with two support pinions of the same material and various factors affecting the system’s failure are analysed.
Table 1 Input parameters for meshing Physics Preference Mechanical Advanced Size Function OFF Relevance Center Fine Element Size 50 mm Smoothing High Transition Fast Span Angle Center Medium Edge Element Length 3 mm Number of Nodes 2400729 Number of Elements 1596038 Fig. 1 Meshed structure Constraints and Boundary Conditions In this analysis cylindrical support has been applied to interior cylindrical faces of the Girth gear and the two pinions.
Online since: February 2012
Authors: Kenji Kanemasu, Katsuyuki Kida, Justyna Rozwadowska, Megumi Uryu, Kenichi Saruwatari, Hitonobu Koike, K. Itakura
Due to constant exposure to high torque and loads toughness, compressive durability and light weight of joint parts are crucial factors for biped walking humanoid robot parts.
When polymer transmission parts are used for the manufacture of humanoid robot joint, wear becomes an important factor in terms of transmission error (backlash) between the input and output axes, ex. between the motor and the robot’s leg joint.
Joints with poor transmission accuracy or failing elements significantly affect the robot’s performance, regardless of the control system quality.
With its excellent friction and wear properties, high impact durability, high corrosion resistance, low specific gravity, high melting temperature of 340˚C, glass transition temperature of 143˚C and heat deflection temperature of 195˚C, PEEK composite is superior to other polymers.
This results show that PEEK bush roughness as tribological property is strongly related to the backlash as mechanical performance.
When polymer transmission parts are used for the manufacture of humanoid robot joint, wear becomes an important factor in terms of transmission error (backlash) between the input and output axes, ex. between the motor and the robot’s leg joint.
Joints with poor transmission accuracy or failing elements significantly affect the robot’s performance, regardless of the control system quality.
With its excellent friction and wear properties, high impact durability, high corrosion resistance, low specific gravity, high melting temperature of 340˚C, glass transition temperature of 143˚C and heat deflection temperature of 195˚C, PEEK composite is superior to other polymers.
This results show that PEEK bush roughness as tribological property is strongly related to the backlash as mechanical performance.
Online since: October 2010
Authors: Ching Ming Cheng, Wen Fang Wu, Yao Hsu
The parameters such as chemical/physical materials properties, numbers of conductors and dielectrics layers were extensively studied [1-9].
The area A can be calculated easily by multiplying L, W and a correct factor together.
Besides the bending moment, the moment of inertia is a crucial factor affecting the bending stress.
[3] Maria Teresa Buscaglia, Marta Bassoli, and Vincenzo Buscaglia, in: Solid-State Synthesis of Nanocrystalline BaTiO3: Reaction Kinetics and Powder Properties, 91 [9] 2862–2869 of Journal of the American Ceramic Society (2008)
[7] Renzheng Chen, Xiaohui Wang, Longtu Li, Zhilun Gui, in: Effects of Nb/Co ratio on the dielectric properties of BaTiO3-based X7R ceramics, B99 (2003) 298-301 of Materials Science and Engineering (2003)
The area A can be calculated easily by multiplying L, W and a correct factor together.
Besides the bending moment, the moment of inertia is a crucial factor affecting the bending stress.
[3] Maria Teresa Buscaglia, Marta Bassoli, and Vincenzo Buscaglia, in: Solid-State Synthesis of Nanocrystalline BaTiO3: Reaction Kinetics and Powder Properties, 91 [9] 2862–2869 of Journal of the American Ceramic Society (2008)
[7] Renzheng Chen, Xiaohui Wang, Longtu Li, Zhilun Gui, in: Effects of Nb/Co ratio on the dielectric properties of BaTiO3-based X7R ceramics, B99 (2003) 298-301 of Materials Science and Engineering (2003)
Online since: May 2013
Authors: N. Siva Shanker, A. Parashuramulu, K. Buschaiah, P. Laxminarayana
India
2,3,4Department of Mechanical Engineering, Osmania University, Hyderabad, A.P.
The very nature of spark erosion or EDM requires the material to be electrically conductive, a property all the ceramics do not possess.
Here Al-alloy, Silicon carbide composite has been machined to analyze the effect of grain size of SiC and its percentage (which affects the electrical conductivity) on the machining rate.
The two factors affecting the erosion rate in EDM of MMC components are the concentration and size of ceramic particulates.
The very nature of spark erosion or EDM requires the material to be electrically conductive, a property all the ceramics do not possess.
Here Al-alloy, Silicon carbide composite has been machined to analyze the effect of grain size of SiC and its percentage (which affects the electrical conductivity) on the machining rate.
The two factors affecting the erosion rate in EDM of MMC components are the concentration and size of ceramic particulates.
Online since: April 2014
Authors: M.S. Hamidah, M.S. Muhd Norhasri, A. Mohd Fadzil, A.G. Abd Halim, M.R. Zaidi
The utilisation of nano silica, nano alumina, titanium oxide and others are proven to enhance properties of concrete.
The advantage of nano materials in concrete is to pack the internal structure of cement paste and as result enhance the mechanical and durability properties of concrete.
Aqel Effect of Nano-clay on Mechanical Properties and Microstructures of Ordinary Portland Cement Mortar.
[6] Arikan, M., et al., Properties of blended cements with thermally activated kaolin.
[10] Rafat Siddique, J.K., Influence of metakaolin on the properties of mortar and concrete: A review.
The advantage of nano materials in concrete is to pack the internal structure of cement paste and as result enhance the mechanical and durability properties of concrete.
Aqel Effect of Nano-clay on Mechanical Properties and Microstructures of Ordinary Portland Cement Mortar.
[6] Arikan, M., et al., Properties of blended cements with thermally activated kaolin.
[10] Rafat Siddique, J.K., Influence of metakaolin on the properties of mortar and concrete: A review.
Online since: June 2011
Authors: Bao Min Sun, Zhao Yong Ding, Bin Jia, Xiao Lian Ding
Flame Synthesis of Carbon Nanotubes and Nanocapsules
DING Zhao-yong1, a, SUN Bao-min1, b, JIA Bin1, c and DING Xiao-lian2, d
1School of Energy, Power and Mechanical Engineering, North China Electric Power University, China
2School of Electrical and Electronic Engineering, North China Electric Power University, China
adingzhaoyong@ncepu.edu.cn; bsbm@ncepu.edu.cn; cathrun_Jin@163.com; da-b-c-d-e-f-g2006@163.com
Key words: Carbon Nanotubes; Nanocapsules; Pyrolysis flame; Sampling time; Catalyst concentration; FE-SEM; HR-TEM.
In addition, it is to say that catalyst concentration is the most important one among all the factors that can be used to determine whether the main products are carbon nanotubes or nanocapsules, and the structures of nanocapsules are also analyzed in detail.
In the experiments of carbon nanotubes synthesis, numbers of factors can affect the products and the capabilities of carbon nanotubes.
Catalyst concentration is one of the most important catalyst factors which can decide the properties of products.
Sampling time is the crucial factor in determining product type and the characteristics of carbon nanotubes. 5 mins are economic for carbon nanotubes synthesis.
In addition, it is to say that catalyst concentration is the most important one among all the factors that can be used to determine whether the main products are carbon nanotubes or nanocapsules, and the structures of nanocapsules are also analyzed in detail.
In the experiments of carbon nanotubes synthesis, numbers of factors can affect the products and the capabilities of carbon nanotubes.
Catalyst concentration is one of the most important catalyst factors which can decide the properties of products.
Sampling time is the crucial factor in determining product type and the characteristics of carbon nanotubes. 5 mins are economic for carbon nanotubes synthesis.
Online since: November 2012
Authors: Zeng Qiang Cao, Qi Liang Zhang, Yun Quan Chen
Riveting connection is extensively applied in aircraft structures, and riveting quality is an important factor affecting safety and fatigue performance of aircraft.
The riveting die angle apparently exerts an influence on the material flow, which further affects the stress and strain distribution.
The laminate material is the TC4 (Ti–6Al–4V) titanium alloy, which is widely utilized in aerospace and other weight critical applications due to its superior properties, such as high specific strength, etc [8,9].
The rivet is fabricated from TC16 (Ti-3Al-5Mo-4.5V) alloy, which is a kind of martensite strengthening (α + β) titanium alloy with good mechanical and processing properties, such as hot deformability, machine workability and corrosion resistance.
Due to the properties of low heat conductivity and high adiabatic shearing sensitivity, ASBs, an important thermoviscoplastic instability mode in metals processed at high strain rates, are easily observed in titanium and its alloys [12].
The riveting die angle apparently exerts an influence on the material flow, which further affects the stress and strain distribution.
The laminate material is the TC4 (Ti–6Al–4V) titanium alloy, which is widely utilized in aerospace and other weight critical applications due to its superior properties, such as high specific strength, etc [8,9].
The rivet is fabricated from TC16 (Ti-3Al-5Mo-4.5V) alloy, which is a kind of martensite strengthening (α + β) titanium alloy with good mechanical and processing properties, such as hot deformability, machine workability and corrosion resistance.
Due to the properties of low heat conductivity and high adiabatic shearing sensitivity, ASBs, an important thermoviscoplastic instability mode in metals processed at high strain rates, are easily observed in titanium and its alloys [12].
Online since: December 2013
Authors: Jian Liang Zhou, Shi Dong Hu, Bin En Nie
Modification of Biomaterials
Applications of Natural Extracellular Matrix
Natural extracellular matrix not only provides structural support, but also mediates cell anchoring and behavior of growth factors and signal peptides.
All of the spatial structures of the extracellular matrix, the ultrastructure, surface morphology, density and the biochemical properties determine its mechanical properties, reactivity to cells and subsequent tissue construction.
Biomaterial Functional Modification by Protein or Peptide Biomaterial functional modification by proteins or peptides should consider both the type of biomaterial as well as the, properties of the proteins or peptides.
[42] Bunting S., Moncada S., Vane J.R.: Antithrombotic properties of vascular endothelium.
[50] Avci-Adali M., Paul A., Ziemer G., et al: New strategies for in vivo tissue engineering by mimicry of homing factors for self-endothelialization of blood contacting materials.
All of the spatial structures of the extracellular matrix, the ultrastructure, surface morphology, density and the biochemical properties determine its mechanical properties, reactivity to cells and subsequent tissue construction.
Biomaterial Functional Modification by Protein or Peptide Biomaterial functional modification by proteins or peptides should consider both the type of biomaterial as well as the, properties of the proteins or peptides.
[42] Bunting S., Moncada S., Vane J.R.: Antithrombotic properties of vascular endothelium.
[50] Avci-Adali M., Paul A., Ziemer G., et al: New strategies for in vivo tissue engineering by mimicry of homing factors for self-endothelialization of blood contacting materials.
Online since: August 2010
Authors: Yoshiharu Mutoh, Farazila Binti Yusof, Yukio Miyashita
However, these techniques are
difficult to apply to dissimilar materials such as metal to polymer due to unlike material properties.
Copper (Cu) has excellent physical properties such as high melting temperature and high electrical conductivity which are much differ from the polymer's properties.
The physical properties of PET, Cu and CuO are shown in Table 1.
The welded area might be one of the factors which affect the joining strength.
However in case of PET/PO Cu joint, significant presence of Cu particles in PET can be seen and were believed could affect the tensile shear strength
Copper (Cu) has excellent physical properties such as high melting temperature and high electrical conductivity which are much differ from the polymer's properties.
The physical properties of PET, Cu and CuO are shown in Table 1.
The welded area might be one of the factors which affect the joining strength.
However in case of PET/PO Cu joint, significant presence of Cu particles in PET can be seen and were believed could affect the tensile shear strength
Online since: August 2006
Authors: L. Dunin-Barkovskii, A. Baskakov, I. Blokhin, S. Shmurak, Y. Tanimoto, R.B. Morgunov
Introduction
The influence of magnetic field (MF) on mechanical, optical, and electrical properties of
diamagnetic solids with paramagnetic defects has been extensively studied (for reviews see e.g
Thus, all external factors (deformation, magnetic field, etc.)
Results and Discussion Influence of Plastic Deformation on Optical and Magnetic Properties of Eu Clusters.
Variations of the Magnetic Properties of Crystals During Dipoles Aggregation into the Clusters.
It means that remnant MF, causal ferromagnetic particles on the surface and another factors could not disturb our experiments in NaCl:Eu crystals.
Thus, all external factors (deformation, magnetic field, etc.)
Results and Discussion Influence of Plastic Deformation on Optical and Magnetic Properties of Eu Clusters.
Variations of the Magnetic Properties of Crystals During Dipoles Aggregation into the Clusters.
It means that remnant MF, causal ferromagnetic particles on the surface and another factors could not disturb our experiments in NaCl:Eu crystals.