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Online since: April 2012
Authors: Zheng Yi Jiang, Si Hai Jiao, Dong Bin Wei, Jun Xia Huang, Ai Wen Zhang, Xu Shi
Friction has a relationship with the rolling force and its distribution, it affects the roll gap and roll wear significantly.
The mechanical properties of oxide scale are attributed to temperature [7-8].
The deformation or fractures of oxide scale affect the roll-strip interface behavior significantly [6].
A number of factors, including porosity, oxide scales present in the layer, and the chemical composition of the steel influence the formation of wustite [11], determine the strength of the oxides scales and therefore the coefficient of friction.
Short time oxidation tests were conducted on Gleeble 3500 thermo-mechanical simulator.
The mechanical properties of oxide scale are attributed to temperature [7-8].
The deformation or fractures of oxide scale affect the roll-strip interface behavior significantly [6].
A number of factors, including porosity, oxide scales present in the layer, and the chemical composition of the steel influence the formation of wustite [11], determine the strength of the oxides scales and therefore the coefficient of friction.
Short time oxidation tests were conducted on Gleeble 3500 thermo-mechanical simulator.
Online since: January 2006
Authors: Martijn Stroeven, Piet Stroeven, J. Hu
Materials and Modeling Approach
Sagoe-Crentsil et al. [11] studied the mechanical properties of PC-based concrete cylinders
(continuously stored under moist conditions for up to 365 days) made with recycled coarse aggregate.
The influence of the magnitude of the size gap between coarse aggregate and fine sand particles on the mechanical properties of model concretes will be discussed in what follows.
This is associated with the mechanical and durability properties of cementitious materials.
Vu: Strength Properties of Metakaolin-blended paste, mortar and concrete, Ph.D.
Stroeven: SPACE approach to concrete's space structure and its mechanical properties, Heron, Vol. 46 (2001), pp. 265-289
The influence of the magnitude of the size gap between coarse aggregate and fine sand particles on the mechanical properties of model concretes will be discussed in what follows.
This is associated with the mechanical and durability properties of cementitious materials.
Vu: Strength Properties of Metakaolin-blended paste, mortar and concrete, Ph.D.
Stroeven: SPACE approach to concrete's space structure and its mechanical properties, Heron, Vol. 46 (2001), pp. 265-289
Online since: November 2025
Authors: Suryamani Behera, Subhajit Mondal, Deepti Ranjan Mohapatra
The material properties of the laminates are shown in Table 1.
Mechanical properties of GFRP laminate E11 E22 E33 μ12 μ13 μ23 G12 G13 G23 25000 25000 5800 0.05 0.28 0.28 5400 3450 3450 A bilinear traction separation law implementing maximum stress criteria is utilised for damage initiation, and critical energy release governs damage evolution, crack opening, and propagation.
Peak load is affected by pre-existing edge crack length variation.
Effect of XFEM mesh density (mesh size) on stress intensity factors (K), strain gradient (dεdr) and stress corrosion cracking (SCC) growth rate.
[9] ASTM D3039/D3039M-17 (2017) Standard test method for tensile properties of polymer matrix composite materials.
Mechanical properties of GFRP laminate E11 E22 E33 μ12 μ13 μ23 G12 G13 G23 25000 25000 5800 0.05 0.28 0.28 5400 3450 3450 A bilinear traction separation law implementing maximum stress criteria is utilised for damage initiation, and critical energy release governs damage evolution, crack opening, and propagation.
Peak load is affected by pre-existing edge crack length variation.
Effect of XFEM mesh density (mesh size) on stress intensity factors (K), strain gradient (dεdr) and stress corrosion cracking (SCC) growth rate.
[9] ASTM D3039/D3039M-17 (2017) Standard test method for tensile properties of polymer matrix composite materials.
Online since: October 2018
Authors: Pavel A. Kuznetsov, Artem Deev, Anton Z. Zhukov, Vitaliy V. Bobyr, Mikhail Staritcyn
Due to the possibility to obtain high values of specific mechanical and deformational properties in cellular or thin-walled structures, this kind of materials are perspective to use in different areas: medicine, transport, machinery, aviation industries etc.
As a consequence, mechanical properties are changed.
In that case in the future we can more thoroughly adjust absorbing properties not only by changing construction but by changing microstructure of the wall material.
Zadpoor, Mechanical properties of additively manufactured octagonal honeycombs, Materials Science and Engineering C.
Petrov, Anisotropy of mechanical properties and its correlation with the structure of the stainless steel 316L produced by the SLM method, Physics Procedia.
As a consequence, mechanical properties are changed.
In that case in the future we can more thoroughly adjust absorbing properties not only by changing construction but by changing microstructure of the wall material.
Zadpoor, Mechanical properties of additively manufactured octagonal honeycombs, Materials Science and Engineering C.
Petrov, Anisotropy of mechanical properties and its correlation with the structure of the stainless steel 316L produced by the SLM method, Physics Procedia.
Online since: March 2017
Authors: Sarum Boonmee, Nupol Mai-Ngam
The content of sulfur in molding materials has been known as an important factor of the occurrence of the graphite degradation.
Introduction The negative effect of casting skin on the mechanical properties has been demonstrated by several investigators [1-5].
Other affecting parameters on the formation of the graphite degradation are pouring temperature, level of Mg in iron melt and casting thickness.
The Mg depletion due the oxidation could not be accounted as the main factor because of the limitation of oxygen available (cores surrounded by liquid iron).
Introduction The negative effect of casting skin on the mechanical properties has been demonstrated by several investigators [1-5].
Other affecting parameters on the formation of the graphite degradation are pouring temperature, level of Mg in iron melt and casting thickness.
The Mg depletion due the oxidation could not be accounted as the main factor because of the limitation of oxygen available (cores surrounded by liquid iron).
Online since: December 2013
Authors: Chalamalasetti Srinivasa Rao, Damera Nageswara Rao, Kondapalli Siva Prasad
Weld quality characteristics like micro structure, hardness and tensile properties are investigated and it is found that the usage of pulsed current leads to better weld quality characteristics when compared to continuous current mode.
1 Introduction
AISI 304 L is a austenitic stainless steel with excellent strength and good ductility at high temperature.
By contrast, in constant current welding, the heat required to melt the base material is supplied only during the peak current pulses allowing the heat to dissipate into the base material leading to narrower Heat Affected Zone (HAZ).
Fig.5 Variation of hardness along the welded joint 1 2 3 4 5 6 7 8 9 7 8 9 Heat Affected Zone Fusion Zone Fig.6 Location of hardness along the weld joint The hardness values obtained using pulsed current mode are higher than contineous current mode.
The hardness and tensile properties of pulsed current mode welding are better than continuous current mode.
[6] G.Padmanaban, V.Balasubramanian, Influences of pulsed current parameters on Mechanical and metallurgical properties of gas tungsten arc welded AZ31B Magnesium alloy, Metals & Materials International, 17 (2011) 679-687
By contrast, in constant current welding, the heat required to melt the base material is supplied only during the peak current pulses allowing the heat to dissipate into the base material leading to narrower Heat Affected Zone (HAZ).
Fig.5 Variation of hardness along the welded joint 1 2 3 4 5 6 7 8 9 7 8 9 Heat Affected Zone Fusion Zone Fig.6 Location of hardness along the weld joint The hardness values obtained using pulsed current mode are higher than contineous current mode.
The hardness and tensile properties of pulsed current mode welding are better than continuous current mode.
[6] G.Padmanaban, V.Balasubramanian, Influences of pulsed current parameters on Mechanical and metallurgical properties of gas tungsten arc welded AZ31B Magnesium alloy, Metals & Materials International, 17 (2011) 679-687
Online since: August 2014
Authors: Chun Yan Diao, Hua Zhong He
Catalyst surface area directly affects catalytic activity.
Mechanical Strength Parameters.
There are 3 indicators for mechanical strength parameters: axial mechanical strength, transverse axial mechanical strength and wear rate.
The pressure drop should be as small as possible, otherwise it will directly affect the hosts of the boiler and flue gas fan safely running.
Thus It also become the key factors that restrict the development of catalysts in China.
Mechanical Strength Parameters.
There are 3 indicators for mechanical strength parameters: axial mechanical strength, transverse axial mechanical strength and wear rate.
The pressure drop should be as small as possible, otherwise it will directly affect the hosts of the boiler and flue gas fan safely running.
Thus It also become the key factors that restrict the development of catalysts in China.
Online since: December 2013
Authors: Ann Lee, Khairul Afif Fadzin
The properties of the coolant in MCHS are important to the heat transfer performance.
The effective thermophysical properties of the nanofluid are calculated using the following equations: Density (5) Heat capacity (6) where the subscripts ‘eff’, ‘p’ and ‘f’ refer to the nanofluid, particle and fluid respectively.
Full properties of the nanofluids are tabulated in Table 1.
Table 1 Thermophysical properties of nanofluids and particle volume concentration at pumping power of 0.05 W Nanofluid ρ [kg m-3] Cp [ J kg-1 °C-1] k [W m-1 °C-1] µ [kg m-1 s-1] ϕ=1% Al2O3-water 1027 4046 1.1567 0.000919 CuO-water 1050 3927 1.1333 0.000996 TiO2-water 1029 4038 1.1167 0.001060 ϕ=2% Al2O3-water 1056 3921 1.6525 0.001004 CuO-water 1103 3700 1.5790 0.001142 TiO2-water 1060 3906 1.4937 0.001394 ϕ=5% Al2O3-water 1146 3586 2.7569 0.001490 CuO-water 1263 3134 2.4147 0.001991 TiO2-water 1155 3554 1.8961 0.004485 Results and discussion Based on the governing equations, the main factors affecting the cooling performance of MCHS are thermal conductivity, dynamic viscosity and thermal capacity of the nanofluids.
Wu, Heat transfer properties of nanoparticle-in-fluid dispersions (nanofluids) in laminar flow, Int.
The effective thermophysical properties of the nanofluid are calculated using the following equations: Density (5) Heat capacity (6) where the subscripts ‘eff’, ‘p’ and ‘f’ refer to the nanofluid, particle and fluid respectively.
Full properties of the nanofluids are tabulated in Table 1.
Table 1 Thermophysical properties of nanofluids and particle volume concentration at pumping power of 0.05 W Nanofluid ρ [kg m-3] Cp [ J kg-1 °C-1] k [W m-1 °C-1] µ [kg m-1 s-1] ϕ=1% Al2O3-water 1027 4046 1.1567 0.000919 CuO-water 1050 3927 1.1333 0.000996 TiO2-water 1029 4038 1.1167 0.001060 ϕ=2% Al2O3-water 1056 3921 1.6525 0.001004 CuO-water 1103 3700 1.5790 0.001142 TiO2-water 1060 3906 1.4937 0.001394 ϕ=5% Al2O3-water 1146 3586 2.7569 0.001490 CuO-water 1263 3134 2.4147 0.001991 TiO2-water 1155 3554 1.8961 0.004485 Results and discussion Based on the governing equations, the main factors affecting the cooling performance of MCHS are thermal conductivity, dynamic viscosity and thermal capacity of the nanofluids.
Wu, Heat transfer properties of nanoparticle-in-fluid dispersions (nanofluids) in laminar flow, Int.
Online since: December 2013
Authors: S. Sharif, Denni Kurniawan, A.Z. Sultan
Surface integrity in the engineering sense can be defined as a set of various properties (both, superficial and in-depth) of an engineering surface that affect the performance of this surface in service.
These properties include surface finish, texture, and profile, fatigue corrosion and wear resistance, and adhesion and diffusion properties among others [15].
Different workpiece material with different properties and microstructure gives different effect during machining, including drilling.
These properties were responsible for the rapid wear on the cutting tool hence resulting in short tool life and rapid tool failure [16].
Viscosity affects the flow of cutting fluid.
These properties include surface finish, texture, and profile, fatigue corrosion and wear resistance, and adhesion and diffusion properties among others [15].
Different workpiece material with different properties and microstructure gives different effect during machining, including drilling.
These properties were responsible for the rapid wear on the cutting tool hence resulting in short tool life and rapid tool failure [16].
Viscosity affects the flow of cutting fluid.
Online since: October 2011
Authors: Che Mohd Ruzaidi Ghazali, H. Kamarudin, A.R. Rafiza, Omar A.K.A. Abdulkareem, M.N. Norazian, Mohd Mustafa Al Bakri Abdullah
All these factors have a major effect on the geopolymerization process and on the strength of the resulting geopolymer.
Water content is considered the most important factor in the geopolymerization process [21].
[3] Davidovits J., “Geopolymer Chemistry And Properties,” In: Proceedings of 1988 geopolymer conference, vol. 1 (1988), pp. 25-48
[11] Hadjito D, Wallah SE, Rangan B.V., “Study On Engineering Properties Of Fly Ash Based Geopolymer Concrete”, Journal of Austr.
[21] Hadjito D, Wallah SE, Rangan B.V., “Study On Engineering Properties Of Fly Ash Based Geopolymer Concrete,” Journal of Austr .Ceram Soc, vol. 38, pp. 76-50, 2002
Water content is considered the most important factor in the geopolymerization process [21].
[3] Davidovits J., “Geopolymer Chemistry And Properties,” In: Proceedings of 1988 geopolymer conference, vol. 1 (1988), pp. 25-48
[11] Hadjito D, Wallah SE, Rangan B.V., “Study On Engineering Properties Of Fly Ash Based Geopolymer Concrete”, Journal of Austr.
[21] Hadjito D, Wallah SE, Rangan B.V., “Study On Engineering Properties Of Fly Ash Based Geopolymer Concrete,” Journal of Austr .Ceram Soc, vol. 38, pp. 76-50, 2002