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Online since: May 2004
Authors: Cemail Aksel
Mechanical Properties of Alumina-Mullite-Zircon Refractories
C.
Keywords: Alumina; mullite; zircon; mechanical properties; thermal shock parameter (R''') Abstract.
Various sintering temperatures were used for the slip-cast refractories and mechanical properties determined as a function of zircon content.
This study aims to understand the mechanisms and relationships between microstructure and mechanical properties, which affect thermal shock behaviour of refractories.
Samples sintered at 1500 and 1650 °C showed a significant increase (by factors of 2.4 and 3.3, respectively), with increasing zircon.
Keywords: Alumina; mullite; zircon; mechanical properties; thermal shock parameter (R''') Abstract.
Various sintering temperatures were used for the slip-cast refractories and mechanical properties determined as a function of zircon content.
This study aims to understand the mechanisms and relationships between microstructure and mechanical properties, which affect thermal shock behaviour of refractories.
Samples sintered at 1500 and 1650 °C showed a significant increase (by factors of 2.4 and 3.3, respectively), with increasing zircon.
Online since: January 2021
Authors: Gen Sasaki
Particle size and distribution affect the thermal properties such as thermal conductivity, thermal expansion, and mechanical properties.
By its distribution situation, the composites have anisotropic properties.
In order to optimize the composite properties, it is necessary to clarify the effect of these factors quantitatively.
In this study, the effect of volume fraction, dispersibility on thermal conductivity, thermal expansion, and mechanical properties were investigated.
Summary To clarify the effect of the morphology of TiB2 particles in Al matrix composites on the thermal properties and mechanical properties, the composites with different volume fraction under different preparation condition was prepared.
By its distribution situation, the composites have anisotropic properties.
In order to optimize the composite properties, it is necessary to clarify the effect of these factors quantitatively.
In this study, the effect of volume fraction, dispersibility on thermal conductivity, thermal expansion, and mechanical properties were investigated.
Summary To clarify the effect of the morphology of TiB2 particles in Al matrix composites on the thermal properties and mechanical properties, the composites with different volume fraction under different preparation condition was prepared.
Online since: April 2015
Authors: Artur Rękas, Tomasz Latos, Łukasz Brodawka, Robert Budzyn, Marcin Fijałkowski
The process of ironing 3xxx series aluminum alloys, which is very sensitive to the properties of raw material, was repeatedly subjected to experiments aimed at testing the relevance of factors affecting the process, the use of new tools and others.
In [8] charge material to the manufacturing process of beverage cans and factors affecting the process of ironing were extensively analyzed.
Charge material (tapes) was taken from three different suppliers and tested for mechanical properties.
The designated mechanical properties for the three suppliers are presented in a table below.
Optimal plastic properties for ironing are determined by a lot of factors.
In [8] charge material to the manufacturing process of beverage cans and factors affecting the process of ironing were extensively analyzed.
Charge material (tapes) was taken from three different suppliers and tested for mechanical properties.
The designated mechanical properties for the three suppliers are presented in a table below.
Optimal plastic properties for ironing are determined by a lot of factors.
Online since: May 2016
Authors: Olexandr Grydin, Serhii Bondarenko, Mykhailo Stolbchenko, Mirko Schaper
In this case, the mechanical properties of different elements of a TRB are similar.
The heterogeneity concerns solely the shape factor of the strip cross-sections.
The aim of this study was to show how the differences in the reduction of various strip elements affect the tailoring of mechanical properties.
Comparison of mechanical properties in different strained strip areas for the condition φ1 ≈ const ≈ 0 Fig. 4.
Comparison of mechanical properties in different strained strip areas for the condition ∆φ = const = 0.232 a) b) Fig. 5.
The heterogeneity concerns solely the shape factor of the strip cross-sections.
The aim of this study was to show how the differences in the reduction of various strip elements affect the tailoring of mechanical properties.
Comparison of mechanical properties in different strained strip areas for the condition φ1 ≈ const ≈ 0 Fig. 4.
Comparison of mechanical properties in different strained strip areas for the condition ∆φ = const = 0.232 a) b) Fig. 5.
Online since: May 2021
Authors: I.A. Trishkina, Ekaterina I. Storozheva, Aleksandr O. Taube
Chemical composition, type of the fracture, macro- and microstructure, as well as the mechanical properties of the metal are studied.
Structural and technological factors contributed to the destruction are identified.
View of the surface of the fracture, mag. x100: a - shaft #1; b - shaft # 2 To study the causes of the destruction, the chemical composition, mechanical properties, and structure of the shaft fragments were studied.
It follows from the table that the mechanical properties of the metal of both fragments satisfy the requirements of the relevant regulatory documents, with the exception of the hardness of the metal of the shaft #1.
Typical mechanical properties of the materials of the shaft core [4].
Structural and technological factors contributed to the destruction are identified.
View of the surface of the fracture, mag. x100: a - shaft #1; b - shaft # 2 To study the causes of the destruction, the chemical composition, mechanical properties, and structure of the shaft fragments were studied.
It follows from the table that the mechanical properties of the metal of both fragments satisfy the requirements of the relevant regulatory documents, with the exception of the hardness of the metal of the shaft #1.
Typical mechanical properties of the materials of the shaft core [4].
Online since: October 2014
Authors: Yan Guo, Peng Ling Li, Bei Bo Zhang
Physical and mechanical properties of the treated flax fiber is shown in Table 3.
Calculate the mean value of the corresponding index factors and range using the range analysis (the range values of all factors is shown in Table 4).
Table 3 Physical and mechanical properties of the treated flax fiber Text NO.
Two factors caused the result: 1.
Conclusion 1)When ultrasound is used for alkali treatment of flax fibers, fiber mechanical properties are better than processed by conventional methods.
Calculate the mean value of the corresponding index factors and range using the range analysis (the range values of all factors is shown in Table 4).
Table 3 Physical and mechanical properties of the treated flax fiber Text NO.
Two factors caused the result: 1.
Conclusion 1)When ultrasound is used for alkali treatment of flax fibers, fiber mechanical properties are better than processed by conventional methods.
Online since: October 2014
Authors: Xiao Chu Wang, Wei Li, Jun Wei Wang, Zhen Huang
Work performance
The performance of the rubber to concrete was influenced by many factors.
Mechanical properties The study of the mechanical properties of rubber concrete was mostly about compression, splitting and flexural strengthen.
The affect of Silane coupling agent to the mechanical properties of crumb rubber cement mortar[J].
Physical mechanical properties of rubber cement concrete [D].
Physical and mechanical properties of rubber concrete [J].
Mechanical properties The study of the mechanical properties of rubber concrete was mostly about compression, splitting and flexural strengthen.
The affect of Silane coupling agent to the mechanical properties of crumb rubber cement mortar[J].
Physical mechanical properties of rubber cement concrete [D].
Physical and mechanical properties of rubber concrete [J].
Online since: September 2013
Authors: Qing Wang, Chao Chen, Hai Zhang
Mechanical safety design can comprehensively take a variety of factors into account, through qualitative and quantitative analysis and evaluation decrease the risk of machinery.
Hazard identification Risk assessment Safety design Mechanical safety design Figure 1 Key elements of the mechanical safety design Safety Design of Sawing Machine Identification of Dangerous and harmful factors.
The dangerous and harmful factors of sawing machine should be identified by mechanical safety basic conception and general rules for design (GB/T 15706—2007).
So the safety device must be adopted to eliminate or weaken the dangerous and harmful factors for it (refer with Figure 2).
Analysis of Harmful Factors Leading to Danger of Woodworking Machinery [J].
Hazard identification Risk assessment Safety design Mechanical safety design Figure 1 Key elements of the mechanical safety design Safety Design of Sawing Machine Identification of Dangerous and harmful factors.
The dangerous and harmful factors of sawing machine should be identified by mechanical safety basic conception and general rules for design (GB/T 15706—2007).
So the safety device must be adopted to eliminate or weaken the dangerous and harmful factors for it (refer with Figure 2).
Analysis of Harmful Factors Leading to Danger of Woodworking Machinery [J].
Online since: October 2014
Authors: Petru Simion, Corneliu Munteanu, Bogdan Istrate, Vasile Dia
The main welding variables affecting the weld quality in HF-ERW are:
I) Mechanical factors (edge formation): degree of ‘’V’’ opening, parallel edges through the ‘’V’ and relative position of edges
II) Electrical factors: welding frequency, welding power, current, voltage and weld speed
III) Squeeze force and upset amount ((the difference between pipe circumference before and after welding)
IV) Welding temperature
V).Properties of base material: weldability, chemical composition, structure [1],
Base Material (BM)
Heat Affected Zone
Weld Fusion Line
If these variables are well established and correct maintain, than shape of heat affected zone are clepsydra type with central ferrite band (fig 2).
Chemical composition and mechanical properties of used hot coil are shown in table 1.
The chemical composition in weight percentages as well mechanical properties of the hot coil used for manufacturing of the structural pipes.
Dimension of hot coil [mm x mm] The chemical composition, [%] Mechanical properties C Mn Si P S Ti V Nb Al CEV ReH, [MPa] Rm, [MPa] A, [%] 1500 x 5.8 0.073 0.513 0.014 0.012 0.011 0.001 0.001 0.017 0.04 0.166 430 495 33.8 1500 x 4.85 0.074 0.514 0.014 0.012 0.011 0.001 0.001 0.017 0.04 0.167 434 489 35 1220 x 7.8 0.076 0.536 0.018 0.011 0.01 0.001 0.001 0.012 0.04 0.171 446 528 29.01 1220 x 9.5 0.075 0.534 0.017 0.01 0.01 0.002 0.001 0.012 0.04 0.170 445 508 28.62 Each hot coil was split into strips corresponding to the diameter of the pipes in order to produce 193.7 mm OD pipes.
Dependence betwen welding temperature and flaring test Conclusion There are a number of interdependent factors affecting weld quality but the most influential are the welding temperature and upset amount.
Chemical composition and mechanical properties of used hot coil are shown in table 1.
The chemical composition in weight percentages as well mechanical properties of the hot coil used for manufacturing of the structural pipes.
Dimension of hot coil [mm x mm] The chemical composition, [%] Mechanical properties C Mn Si P S Ti V Nb Al CEV ReH, [MPa] Rm, [MPa] A, [%] 1500 x 5.8 0.073 0.513 0.014 0.012 0.011 0.001 0.001 0.017 0.04 0.166 430 495 33.8 1500 x 4.85 0.074 0.514 0.014 0.012 0.011 0.001 0.001 0.017 0.04 0.167 434 489 35 1220 x 7.8 0.076 0.536 0.018 0.011 0.01 0.001 0.001 0.012 0.04 0.171 446 528 29.01 1220 x 9.5 0.075 0.534 0.017 0.01 0.01 0.002 0.001 0.012 0.04 0.170 445 508 28.62 Each hot coil was split into strips corresponding to the diameter of the pipes in order to produce 193.7 mm OD pipes.
Dependence betwen welding temperature and flaring test Conclusion There are a number of interdependent factors affecting weld quality but the most influential are the welding temperature and upset amount.
Online since: September 2013
Authors: Mudassir Hussain, Muhammad Saqib Anwar, Mubashir Gulzar, Muhammad Sajjad Sabir Malik
Since the crankshaft is predisposed to massive loads during combustion cycles, so different factors like endurance has to be kept in mind while designing crankshaft.
Keeping in view the above scenario, the main motive of this paper is to do the fatigue analysis so that we can analyze various factors that are affecting the service life of crankshaft.
Their investigations showed that production volume and requirements of the engine are the pre-eminent factors for this application.
The cast iron crankshaft was found to be most suitable in manufacturing processes, however if the design requires better mechanical properties, than other alternatives have to be took into account.
Model Information Volumetric Properties Material Properties Mass:2.35085 lb Volume:8.45077 in3 Density:0.278181 lb/in3 Weight:2.34925 lbf Name: Steel, prestressing strands Model type:Linear Elastic Isotropic Default failure criterion: Max von Mises Stress Yield strength: 1.650 GPa Tensilestrength:7.23826e+008N/m2 Elastic modulus: 2.1e+01 N/m2 Poisson's ratio: 0.28 Mass density: 7850 kg/m3 Shear modulus:7.9e+010 N/m2 Fig.1.
Keeping in view the above scenario, the main motive of this paper is to do the fatigue analysis so that we can analyze various factors that are affecting the service life of crankshaft.
Their investigations showed that production volume and requirements of the engine are the pre-eminent factors for this application.
The cast iron crankshaft was found to be most suitable in manufacturing processes, however if the design requires better mechanical properties, than other alternatives have to be took into account.
Model Information Volumetric Properties Material Properties Mass:2.35085 lb Volume:8.45077 in3 Density:0.278181 lb/in3 Weight:2.34925 lbf Name: Steel, prestressing strands Model type:Linear Elastic Isotropic Default failure criterion: Max von Mises Stress Yield strength: 1.650 GPa Tensilestrength:7.23826e+008N/m2 Elastic modulus: 2.1e+01 N/m2 Poisson's ratio: 0.28 Mass density: 7850 kg/m3 Shear modulus:7.9e+010 N/m2 Fig.1.