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Online since: February 2021
Authors: Farid Sebaai, Xiu Mei Xu, Efrain Altamirano-Sanchez, Murat Pak, Christie Delvaux, Geert Mannaert
This preliminary finding is contradictory to the prevalent models that are based on equilibrium force balance between capillary and mechanical interactions.
This, however, is an impossible mission as pattern collapse can be affected by many different factors, including mechanical and wetting property of the structures, surface tension force, capillary pressure, wet/dry adhesion, geometrical arrangement, dewetting dynamics, capillary buckling and viscous dissipation.
Combined with mechanical modeling, collapse rates can be directly correlated with the intrinsic bending stiffness of the structures.
In this work, we show a recent development of new test structures that allow us to investigate how geometrical arrangement can affect dewetting dynamics and pattern collapse.
This, however, is an impossible mission as pattern collapse can be affected by many different factors, including mechanical and wetting property of the structures, surface tension force, capillary pressure, wet/dry adhesion, geometrical arrangement, dewetting dynamics, capillary buckling and viscous dissipation.
Combined with mechanical modeling, collapse rates can be directly correlated with the intrinsic bending stiffness of the structures.
In this work, we show a recent development of new test structures that allow us to investigate how geometrical arrangement can affect dewetting dynamics and pattern collapse.
Online since: October 2010
Authors: Kwesi Sagoe–Crentsil, Trevor Brown, Shi Qin Yan
Whereas permeability tends to be more influenced by pore connectivity, the elastic properties and strength of concrete are affected by the total volume of pores, in particular, the distribution of macropores which are sized greater than 50nm[3-4].
Fresh concrete properties Wet concrete property GP concrete OPC concrete Mix Temp.
The relatively dense microstructures suggest possible good mechanical properties, partly attributable to the near-complete gelling characteristics of traditional silica geopolymer systems during heat-curing.
The corresponding risk factors associated with GP binder systems though likely to be similar to OPC systems, remain largely unclear.
Davidovits, Properties of geopolymer cements, in: P.V.
Fresh concrete properties Wet concrete property GP concrete OPC concrete Mix Temp.
The relatively dense microstructures suggest possible good mechanical properties, partly attributable to the near-complete gelling characteristics of traditional silica geopolymer systems during heat-curing.
The corresponding risk factors associated with GP binder systems though likely to be similar to OPC systems, remain largely unclear.
Davidovits, Properties of geopolymer cements, in: P.V.
Online since: December 2012
Authors: Yuan Pan
Introduction
Fully-automatic hydraulic press is mainly used for pressing of ceramic tiles, and it is one of the key mechanical equipments of ceramic wall and floor tiles production line.
The characteristic coefficient and mechanical properties are as follows: Mass density: 7800kg/m3; elastic modulus: 2 e +11 Pa; Poisson's ratio: 0.32; yield limit: 310MPa; intensity limit: 570MPa.
Appropriate constraint handling will directly affect the calculation results, so it must be as close as possible to the actual.
The Shape Correction Factor: The shape correction factor F depends on the geometry of the component and defect.
Such as when the girder’s cracks extend from 0.5㎜ (a0) to 100㎜ (ac), the service life is Np*=4.62×105(times) Correction Factor: The shape correction factor F depends on the geometry of the component and defect.
The characteristic coefficient and mechanical properties are as follows: Mass density: 7800kg/m3; elastic modulus: 2 e +11 Pa; Poisson's ratio: 0.32; yield limit: 310MPa; intensity limit: 570MPa.
Appropriate constraint handling will directly affect the calculation results, so it must be as close as possible to the actual.
The Shape Correction Factor: The shape correction factor F depends on the geometry of the component and defect.
Such as when the girder’s cracks extend from 0.5㎜ (a0) to 100㎜ (ac), the service life is Np*=4.62×105(times) Correction Factor: The shape correction factor F depends on the geometry of the component and defect.
Online since: May 2007
Authors: Y.X. Cui, Sheng Long Dai, J.Z. Chen, Liang Zhen, Bao You Zhang
Through-thickness microstructure, texture and mechanical property gradients in the
longitudinal section of AA 7055 rolled plate have been investigated using electron back-scattered
diffraction (EBSD) technique.
These good properties are attributed to the T77 temper [1-5].
However, the microstructure and texture, which significantly affect the mechanical properties, may be inhomogeneous through the thickness of the rolled sheets or plates due to the inhomogeneity of the deformation caused during rolling [6-8], and the non uniformity of the recrystallization that occurs during the heat treatment [9].
Therefore, considering "structure application", how to control the microstructure and texture during deformation and the sequent heat treatment in order to obtain good combined properties is imperative.
Therefore, the anisotropy of the strength is mainly affected by grain shape [12].
These good properties are attributed to the T77 temper [1-5].
However, the microstructure and texture, which significantly affect the mechanical properties, may be inhomogeneous through the thickness of the rolled sheets or plates due to the inhomogeneity of the deformation caused during rolling [6-8], and the non uniformity of the recrystallization that occurs during the heat treatment [9].
Therefore, considering "structure application", how to control the microstructure and texture during deformation and the sequent heat treatment in order to obtain good combined properties is imperative.
Therefore, the anisotropy of the strength is mainly affected by grain shape [12].
Online since: October 2025
Authors: Ihor Bordun, Nazar Nahurskyi, Anatoliy Borysiuk, Myroslav Malovanyy
It was found that the addition of oleic acid does not significantly alter the structural or magnetic properties of the synthesized composite.
Magnetic properties were measured using a vibrating sample magnetometer, as described in [28].
This change manifested in greatly improved adsorption properties of the composites synthesized with OA.
Szymczykiewicz, Synthesis and Electrochemical Properties of Fe₃O₄/C Nanocomposites for Symmetric Supercapacitors, Appl.
A review of the structure, properties and types of amyloid, and a proposed staining mechanism for Congo red staining, Biotech.
Magnetic properties were measured using a vibrating sample magnetometer, as described in [28].
This change manifested in greatly improved adsorption properties of the composites synthesized with OA.
Szymczykiewicz, Synthesis and Electrochemical Properties of Fe₃O₄/C Nanocomposites for Symmetric Supercapacitors, Appl.
A review of the structure, properties and types of amyloid, and a proposed staining mechanism for Congo red staining, Biotech.
Online since: October 2010
Authors: Zhi Yong Li, Zong Wei Niu
Because the process of blade in electrochemical machining(EMC) can be effected by
many factors, such as blade shapes, machining electrical field, electrolyte fluid field and anode
electrochemical dissolution, different ECM machining parameters maybe result in great affections
on blade machining accuracy.
Being a non-mechanical metal removal process, ECM is capable of machining any electrically conductive materials with high stock removal rates regardless of their mechanical properties, such as hardness, elasticity and brittleness.
These process parameters are capable of affecting the machining accuracy of ECM.
According to ECM electrolyte fluid theory, two main factors, electrolyte temperature T and electrolyte pressure between electrolyte inlet and outlet P have important influence on κ.
The main causes resulting in high failure rate is that there are so many various ECM process parameters which can affect ECM process stability and machining accuracy.
Being a non-mechanical metal removal process, ECM is capable of machining any electrically conductive materials with high stock removal rates regardless of their mechanical properties, such as hardness, elasticity and brittleness.
These process parameters are capable of affecting the machining accuracy of ECM.
According to ECM electrolyte fluid theory, two main factors, electrolyte temperature T and electrolyte pressure between electrolyte inlet and outlet P have important influence on κ.
The main causes resulting in high failure rate is that there are so many various ECM process parameters which can affect ECM process stability and machining accuracy.
Online since: June 2013
Authors: Chun Yan Duan, Dong Liang Lu, Tao Lin, Da Jun Zhang
A lot of factors could influence the result of directional solidification.
Directional solidification technique enables the solidification structure of materials to put in order along a specific direction, namely as the directional or single crystal structure, which could improve scientifically mechanical and physical properties of materials.
We will investigate cooling water flow how to affect the impurity removing efficiency.
The impurity removal rate of Fe,Al and Ca Conclusions From the results,we could infer: (1) As was shown in Table 3, Cooling water flow was an important factor to the remove impurities , the impurity removal rate of Fe, Al, Ca were the most obvious, the impurity removal rate of Ca, Ti, Cr, Mn were the second best, the impurity removal rate of B,P were not obvious,especially to B.From Fig.1 we could found that the contents of B has significantly increased instead of decrease
Directional solidification technique enables the solidification structure of materials to put in order along a specific direction, namely as the directional or single crystal structure, which could improve scientifically mechanical and physical properties of materials.
We will investigate cooling water flow how to affect the impurity removing efficiency.
The impurity removal rate of Fe,Al and Ca Conclusions From the results,we could infer: (1) As was shown in Table 3, Cooling water flow was an important factor to the remove impurities , the impurity removal rate of Fe, Al, Ca were the most obvious, the impurity removal rate of Ca, Ti, Cr, Mn were the second best, the impurity removal rate of B,P were not obvious,especially to B.From Fig.1 we could found that the contents of B has significantly increased instead of decrease
Online since: August 2010
Authors: Tian Chen
In the early stage of design, many factors of the
downstream design, such as manufacturability, assembling and quality assurance, can not be fully
considered[1].
It allows geometry, properties, operations or their group parameterized and packing.
Inline node allows to import a virtual model in a VRML space originally existing in an another virtual space, while retaining all the properties of the model itself.
Appearance { exposedField SFNode material NULL exposedField SFNode texture NULL exposedField SFNode textureTransform NULL } Virtual prototyping system of pump uses Appearance nodes to package material field which contains Material nodes, defines the material of pump parts, and describe the reflective properties of pump parts.
Conclusions To develop a new product need to consider many factors.
It allows geometry, properties, operations or their group parameterized and packing.
Inline node allows to import a virtual model in a VRML space originally existing in an another virtual space, while retaining all the properties of the model itself.
Appearance { exposedField SFNode material NULL exposedField SFNode texture NULL exposedField SFNode textureTransform NULL } Virtual prototyping system of pump uses Appearance nodes to package material field which contains Material nodes, defines the material of pump parts, and describe the reflective properties of pump parts.
Conclusions To develop a new product need to consider many factors.
Effect of the Binder on Properties of Molten Core and Co-Debinding Behavior in Silica-Based Ceramics
Online since: June 2021
Authors: Peng Zhang, Yuan Si
Silica-based ceramic cores are used most often for their unique high-temperature properties.
Summary The effects of molecular weight of a binder on the properties of molten cores have been investigated
References [1] Wei Q, Zhong J W, Xu Z L, et al, Microstructure evolution and mechanical properties of ceramic shell moulds for investment casting of turbine blades by selective laser sintering, Ceram Int. 44(2018) 12088-12097
[4] Qin Y X, Pan W, Effect of silica sol on the properties of alumina-based ceramic core composites, Mater Sci Eng A-Sruct. 508(2009) 71-75
[6] Kim Y T, Yeo J, Lee S, et al, Influence of silicon carbide as a mineralizer on mechanical and thermal properties of silica-based ceramic cores, Ceram Int. 42(2016) 14738-14742
Summary The effects of molecular weight of a binder on the properties of molten cores have been investigated
References [1] Wei Q, Zhong J W, Xu Z L, et al, Microstructure evolution and mechanical properties of ceramic shell moulds for investment casting of turbine blades by selective laser sintering, Ceram Int. 44(2018) 12088-12097
[4] Qin Y X, Pan W, Effect of silica sol on the properties of alumina-based ceramic core composites, Mater Sci Eng A-Sruct. 508(2009) 71-75
[6] Kim Y T, Yeo J, Lee S, et al, Influence of silicon carbide as a mineralizer on mechanical and thermal properties of silica-based ceramic cores, Ceram Int. 42(2016) 14738-14742
Online since: August 2018
Authors: Mohab Hossam, Abdallah Abdelkawy, Hassan El-Hofy
Due to their superior mechanical properties, it is difficult to machine such materials by conventional methods.
The analysis of variance technique (ANOVA) is carried out to the statistically designed experiments in order to find the significant factors affecting feed force and drilling moment.
Table 1 shows the drilling factors and their levels.
Table 1 Drilling factors and their values used in the experimental work.
Pei, “Modeling the dependency of edge chipping size on the material properties and cutting force for rotary ultrasonic drilling of brittle materials,” Int.
The analysis of variance technique (ANOVA) is carried out to the statistically designed experiments in order to find the significant factors affecting feed force and drilling moment.
Table 1 shows the drilling factors and their levels.
Table 1 Drilling factors and their values used in the experimental work.
Pei, “Modeling the dependency of edge chipping size on the material properties and cutting force for rotary ultrasonic drilling of brittle materials,” Int.