Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: September 2014
Authors: Srđan M. Bošnjak, Aleksandar Veljović, Vencislav Grabulov, Zoran Savić, Miodrag Arsić
Basic Technical Properties of the Supply Tank.
According to the documentation of the manufacturer, basic technical properties of the supply tank are as follows: – country of the manufacturer of the supply tank .................................................................
welding – quality factor of the welded joint
Integrity evaluation during service has been performed through the analytical calculation of shell and upper bottom strength based on technical properties, after the completion of repair welding / surface welding.
Calculation of strength in relation to the internal pressure (equation 5) proved that thickness of sheet metal of the torical section of supply tank bottom is sufficient: = (2) In equations 1 and 2 S is the safety factor, factor c1 is allowable deviation of material thickness in accordance with standard [18], while factor c2 is corrosion addition in accordance with standard [19].
According to the documentation of the manufacturer, basic technical properties of the supply tank are as follows: – country of the manufacturer of the supply tank .................................................................
welding – quality factor of the welded joint
Integrity evaluation during service has been performed through the analytical calculation of shell and upper bottom strength based on technical properties, after the completion of repair welding / surface welding.
Calculation of strength in relation to the internal pressure (equation 5) proved that thickness of sheet metal of the torical section of supply tank bottom is sufficient: = (2) In equations 1 and 2 S is the safety factor, factor c1 is allowable deviation of material thickness in accordance with standard [18], while factor c2 is corrosion addition in accordance with standard [19].
Online since: March 2020
Authors: Surasak Suranuntchai
By using this technique, different factors affected during rolling process can be investigated and controlled such as the metal flow, the distribution of stress and strain, and the deformation zone.
In consequence, the computational analysis with mathematical model by using Finite Volume Method had been applied to predict the suitable production process and good product quality, which base on the input of mechanical properties of raw material and process parameters [1].
Mathematical Model Modeling three dimensional models according to the rolling design, the assumption have been applied in the simulation for material properties such as mechanical properties and processing conditions as shown in Table 1.
Mechanical properties and rolling process conditions [6].
[7] Lenard, J.G., Pietrzyk, M. and Cser, L. 1999, Mathematical and Physical Simulation of the Properties of Hot Rolled Products, Elsevier, Oxford, UK
In consequence, the computational analysis with mathematical model by using Finite Volume Method had been applied to predict the suitable production process and good product quality, which base on the input of mechanical properties of raw material and process parameters [1].
Mathematical Model Modeling three dimensional models according to the rolling design, the assumption have been applied in the simulation for material properties such as mechanical properties and processing conditions as shown in Table 1.
Mechanical properties and rolling process conditions [6].
[7] Lenard, J.G., Pietrzyk, M. and Cser, L. 1999, Mathematical and Physical Simulation of the Properties of Hot Rolled Products, Elsevier, Oxford, UK
Online since: May 2015
Authors: Raja Izamshah, Mohd Amri, A. Yu Lung, P.J. Liew, Mohd Sanusi, Mohd Asyadi Azam, Effendi Mohamad
For annealing, it is already well known that there is a significant correlation between crystallinity and mechanical properties.
The research proved that there is a reorganization of the molecular chains between the major lamellae which significantly enhance the mechanical properties of PEEK.
Smooth surfaces can be obtained by annealing because it increase the degrees of crystallinity in the PEEK material, improve the mechanical properties and release residual stress.
Ankara, The effect of heat treatment on the properties of PEEK and APC2, Compos.
Harel, The influence of thermal history on the mechanical properties of PEEK matrix composite materials, Comp.
The research proved that there is a reorganization of the molecular chains between the major lamellae which significantly enhance the mechanical properties of PEEK.
Smooth surfaces can be obtained by annealing because it increase the degrees of crystallinity in the PEEK material, improve the mechanical properties and release residual stress.
Ankara, The effect of heat treatment on the properties of PEEK and APC2, Compos.
Harel, The influence of thermal history on the mechanical properties of PEEK matrix composite materials, Comp.
Online since: December 2012
Authors: Heng Li, Kai Peng Shi, Yu Li Tian, He Yang
Tube bending is a complex process with multi-factor coupling effect and multiple defects occurring.
Furthermore, table 1 shows the mechanical properties of the 6061-T4 Al-alloy tube, which is obtained using the uniaxial tension test and the tensile rate is 20mm/min.
Pressure die Clamp die Tube Wiper die Bend die Mandrel balls Mandrel Fig 1 Half FE model for tube bending Table 1 Mechanical properties of 6061-T4 Al-alloy tube Elastic modulus E (GPa) 58.7 Elongation δ (%) 25.7 Yield strength σ0.2 (MPa) 164 Tensile strength σb (MPa) 277 Strength factor k (MPa) 527.6 Hardening exponent n 0.278 Normal anisotropy coefficient r 0.767 By comparing the results of FE simulation and experiments, reliability and accuracy of the FE model is validated, as shown in figure 2, The bending condition for the simulation and the experiment are same, shown as follows: the tube material is 6061-T4 Al-alloy, the bending radius R is 101.6mm, the bending angle is 90, the bending velocity v is 2, the mandrel extension length em is 5mm, and the coefficient of boost velocity vp is 100%.
It can be found that ,,,,and R affect the wall thinning significantly, while the others have little effect on the wall thinning.
Conclusions The orthogonal test is conducted to study the significance of bending parameters on the wall thinning and the following conclusions are obtained: 1) the maximum wall thinning degree decreases almost linearly with increasing of the bending radius. 2) ,,,, and are also significant factors for wall thinning in tube bending, while not as great as R.
Furthermore, table 1 shows the mechanical properties of the 6061-T4 Al-alloy tube, which is obtained using the uniaxial tension test and the tensile rate is 20mm/min.
Pressure die Clamp die Tube Wiper die Bend die Mandrel balls Mandrel Fig 1 Half FE model for tube bending Table 1 Mechanical properties of 6061-T4 Al-alloy tube Elastic modulus E (GPa) 58.7 Elongation δ (%) 25.7 Yield strength σ0.2 (MPa) 164 Tensile strength σb (MPa) 277 Strength factor k (MPa) 527.6 Hardening exponent n 0.278 Normal anisotropy coefficient r 0.767 By comparing the results of FE simulation and experiments, reliability and accuracy of the FE model is validated, as shown in figure 2, The bending condition for the simulation and the experiment are same, shown as follows: the tube material is 6061-T4 Al-alloy, the bending radius R is 101.6mm, the bending angle is 90, the bending velocity v is 2, the mandrel extension length em is 5mm, and the coefficient of boost velocity vp is 100%.
It can be found that ,,,,and R affect the wall thinning significantly, while the others have little effect on the wall thinning.
Conclusions The orthogonal test is conducted to study the significance of bending parameters on the wall thinning and the following conclusions are obtained: 1) the maximum wall thinning degree decreases almost linearly with increasing of the bending radius. 2) ,,,, and are also significant factors for wall thinning in tube bending, while not as great as R.
Online since: January 2013
Authors: Xi Jun Liu, Chun Hua Lou, Yan Ping Liu
Results and Discussion
There are many factors to affect the polymerization process of core-shell latex particles, and the polymerization temperature, initiator dosage and reaction time on the stability of polymerization system is particularly important.
The chemical connection in core-shell interface is very important for improving the toughness of brittle material,however the key factors affecting the chemical connection is the intruduction of grafting agent.
In orthogonal test of three factors five levels, change factor were polymerization temperature, initiator dosage, and reaction time, which logogram as A, B, C, respectively.
The effect of three factors on the polymerization system was verified with BA conversion as the evaluation index.
Effect of reactive group types on the properties of core-shell modifiers toughened PA6.
The chemical connection in core-shell interface is very important for improving the toughness of brittle material,however the key factors affecting the chemical connection is the intruduction of grafting agent.
In orthogonal test of three factors five levels, change factor were polymerization temperature, initiator dosage, and reaction time, which logogram as A, B, C, respectively.
The effect of three factors on the polymerization system was verified with BA conversion as the evaluation index.
Effect of reactive group types on the properties of core-shell modifiers toughened PA6.
Online since: July 2017
Authors: Christoph Kralovec, Martin Schagerl
Introduction
Modern lightweight structures are characterized by their maximized exploitation of the given material
properties.
This setting is of course an idealization of realityTable 1: Properties of Aluminum face-layers and honeycomb core Material properties Unit Aluminum Honeycomb Density ρ kg/m3 2660 59.3 Young's modulus E11 GPa 70 0.001 E22 0.634 E33 0.001 Shear modulus ¯G12 GPa 0.206 G13 0.001 ¯G23 0.206 Poisson ratio ν12 1 0.33 0 ν13 0.5 ν23 0 Table 2: Properties of the PWAS (material: PIC255) acc. to supplier Unit Value Physical and dielectric properties Density ρp kg/m3 7800 Poisson's ratio νp 0.34 Relative permittivity in the polarization εT22 1 1750 ε0 Relative permittivity direction ⊥ to polarization εT11 1 1650 ε0 Elastic compliance coefficient sE11 10−12 m2/N 16.1 Elastic compliance coefficient sE22 10−12 m2/N 20.7 Dielectric loss factor δ 1 0.02 Electro-mechanical properties Coupling factor for transverse oscillation κ21 1 0.35 Transverse piezoelectric large-signal deformation coefficient d21 10−12 C/N -180 Longitudinal piezoelectric large-signal deformation coefficient
Due to many influence factors, like e.g. damping influences (dirt, etc.) or temperature changes, damage is usually reported after a certain threshold limit.
The material properties are defined according to Table 1 and 2.
As in a real application one is looking for the "best fit" for a given monitoring signal, this is not affecting the practical use of the method.
This setting is of course an idealization of realityTable 1: Properties of Aluminum face-layers and honeycomb core Material properties Unit Aluminum Honeycomb Density ρ kg/m3 2660 59.3 Young's modulus E11 GPa 70 0.001 E22 0.634 E33 0.001 Shear modulus ¯G12 GPa 0.206 G13 0.001 ¯G23 0.206 Poisson ratio ν12 1 0.33 0 ν13 0.5 ν23 0 Table 2: Properties of the PWAS (material: PIC255) acc. to supplier Unit Value Physical and dielectric properties Density ρp kg/m3 7800 Poisson's ratio νp 0.34 Relative permittivity in the polarization εT22 1 1750 ε0 Relative permittivity direction ⊥ to polarization εT11 1 1650 ε0 Elastic compliance coefficient sE11 10−12 m2/N 16.1 Elastic compliance coefficient sE22 10−12 m2/N 20.7 Dielectric loss factor δ 1 0.02 Electro-mechanical properties Coupling factor for transverse oscillation κ21 1 0.35 Transverse piezoelectric large-signal deformation coefficient d21 10−12 C/N -180 Longitudinal piezoelectric large-signal deformation coefficient
Due to many influence factors, like e.g. damping influences (dirt, etc.) or temperature changes, damage is usually reported after a certain threshold limit.
The material properties are defined according to Table 1 and 2.
As in a real application one is looking for the "best fit" for a given monitoring signal, this is not affecting the practical use of the method.
Online since: February 2015
Authors: Jun Qiang Li, Chao Shi, Juan Wang, Song Song Zhu
On these bases, the mechanical performance test system of the MR brake were developed, the mechanical performance of the brake was researched used the test system, the brake’s properties: torque vs. speed and yield torque vs. current were obtained.
Shear mode is commonly used in brakes, the effective area of shear mode between the rotor and stator is one of the main factors affecting the performance of the brake.
Mechanical Properties Analysis Using Finite Element Method The more accurate distributing of the magnetic flux density in the working area can be obtained using finite element method, then the mechanical properties can be calculated.
Based on the MR fluid properties and results analysis using finite element method, mechanical properties of the MR brake were calculated, the results show that there is little change of the brake torque with the changing of the speed, and the yield torque increases with the increasing of the current, and the growth rate decreases.
The MR brake, current driver and the damper performance test system were developed, the damper properties: torque vs. speed and yield torque vs. current were test.
Shear mode is commonly used in brakes, the effective area of shear mode between the rotor and stator is one of the main factors affecting the performance of the brake.
Mechanical Properties Analysis Using Finite Element Method The more accurate distributing of the magnetic flux density in the working area can be obtained using finite element method, then the mechanical properties can be calculated.
Based on the MR fluid properties and results analysis using finite element method, mechanical properties of the MR brake were calculated, the results show that there is little change of the brake torque with the changing of the speed, and the yield torque increases with the increasing of the current, and the growth rate decreases.
The MR brake, current driver and the damper performance test system were developed, the damper properties: torque vs. speed and yield torque vs. current were test.
Online since: January 2021
Authors: Goroh Itoh, Naoya Kakefuda, Junya Kobayashi, Tomohiko Hojo, Shintaro Aizawa, Ryo Sakata
Low alloy TRIP steel is expected to be applied to automobile bodies because of its high strength, high ductility, and excellent impact properties and press formability.
Then, these results are discussed about the relationships between mechanical properties and microstructure of the TM steel.
This means that the amount of retained austenite used for transformation induced plasticity is small, and there is a possibility that martensitic transformation may occur due to factors such as the introduction of hydrogen embrittlement.
In this study, the retained austenite properties and their hydrogen embrittlement resistance properties of TM steels produced at various cooling rates below Ms temperature are investigated and discussed their relationships.
Dong, Microstructure and mechanical properties of Fe-0.2C-5Mn steel processed by ART-annealing, Mater.
Then, these results are discussed about the relationships between mechanical properties and microstructure of the TM steel.
This means that the amount of retained austenite used for transformation induced plasticity is small, and there is a possibility that martensitic transformation may occur due to factors such as the introduction of hydrogen embrittlement.
In this study, the retained austenite properties and their hydrogen embrittlement resistance properties of TM steels produced at various cooling rates below Ms temperature are investigated and discussed their relationships.
Dong, Microstructure and mechanical properties of Fe-0.2C-5Mn steel processed by ART-annealing, Mater.
Online since: May 2014
Authors: Rattikorn Saodaen, Somchai Wonthaisong, Somsak Ithisoponakul, Janmanee Pichai
The researcher has focused upon considering types of mould materials, because they need efficiency properties.
A current factor affecting mould-making is that people do not truly understand the quality of milling surfaces in materials used for mould making, which is highly important in plastic moulded products.
It resulted from many factors, such as feed rates, spindle speeds and milling levels, which were main factors in the experiment.
However, the cause probably resulted from mechanical properties of the plastic mould steels, and created better quality than plastic mould steel ‘AISI-1050’, based on the testing completed in such conditions [6].
Gonz´alez,“Analysis of factors affecting the high-speed side milling of hardened diesteels”,Journal of Materials Processing Technology.Vol.162–163,200,pp. 696–701
A current factor affecting mould-making is that people do not truly understand the quality of milling surfaces in materials used for mould making, which is highly important in plastic moulded products.
It resulted from many factors, such as feed rates, spindle speeds and milling levels, which were main factors in the experiment.
However, the cause probably resulted from mechanical properties of the plastic mould steels, and created better quality than plastic mould steel ‘AISI-1050’, based on the testing completed in such conditions [6].
Gonz´alez,“Analysis of factors affecting the high-speed side milling of hardened diesteels”,Journal of Materials Processing Technology.Vol.162–163,200,pp. 696–701
Online since: December 2013
Authors: M.R.M. Akramin, A. Zulkifli, Ahmad K. Ariffin
Material properties that have been used in this study are summarized in Table 1.
The crack opening resistance is a function of the specimen’s geometry, material properties, orientation with respect to loading and the crack geometry.
The second parameter affected in this study is force applied on the vertebral body with correlation 0.192.
Chui, Bone material properties and fracture analysis: Needle insertion for spinal surgery, Journal of The Mechanical Behavior of Biomedical Materials 1 (2008) 115-139
Guo, Some factors that affect the comparison between isotropic and orthotropic inhomogeneous finite element material models of femur, Medical Engineering & Physics 32 (2010) 553-560
The crack opening resistance is a function of the specimen’s geometry, material properties, orientation with respect to loading and the crack geometry.
The second parameter affected in this study is force applied on the vertebral body with correlation 0.192.
Chui, Bone material properties and fracture analysis: Needle insertion for spinal surgery, Journal of The Mechanical Behavior of Biomedical Materials 1 (2008) 115-139
Guo, Some factors that affect the comparison between isotropic and orthotropic inhomogeneous finite element material models of femur, Medical Engineering & Physics 32 (2010) 553-560