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Online since: February 2013
Authors: Suhas N. Patil, Shivprasad K. Tilekar, Bhimrao P. Ladgaonkar
These properties are significantly dependent upon environmental conditions to which it has been exposed [2].
Therefore, it can be said that the polycrystalline soft ferrites show very interesting electrical properties [3, 4].
Humidity, the concentration of water vapour in air, is the environmental factor affecting various industrial and agricultural sectors.
However, the compositions under investigations NiZn ferrites are also revealing the humidity related properties.
Gabal, Magnetic properties of NiCuZn ferrite nanoparticles synthesized using egg-white, Mater.
Online since: December 2019
Authors: Zdenko Tonković, Jurica Sorić, Ante Jurčević, Karlo Seleš
Strain Energy Decomposition Influence in the Phase-Field Crack Modelling at the Microstructural Level of Heterogeneous Materials Karlo Seleš1,a, Zdenko Tonković1,b, Ante Jurčević1,c, Jurica Sorić1,d 1University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, I.
The microstructural geometries of the nodular cast iron obtained with the metallographic examination and the material properties of an academic brittle material have been used in numerical simulations where the graphite nodules have been considered as porosities.
For the brittle material behaviour assumption, the phase-field approach is mostly based on the Griffith's linear elastic fracture mechanics theory, where the crack evolution depends on the material properties, in particular the fracture stress/strain and the fracture toughness, and external factors, such as mechanical loads [2,3].
Since at this moment, the here presented phase-field model predicts brittle fracture initiation and propagation, the nodular cast iron ductile material properties have been replaced with the academic brittle material characteristics in this work.
However, it is also evident that different decomposition models can affect the crack branching and propagation prediction.
Online since: April 2012
Authors: Feng Lan Wei, Chun Long Li, Wei Chen, Zheng Yang Li
Then, we may wonder what physical meaning does B have exactly, what factors are related to it, and what material characteristics does it reflect, since there is still no perfect explaination on this issue, and it needs to be proved in theory.
C.Theory Three Considering the complexity of the theoretical analysis and the diversity of factors, Ono Kouhei came up with another way to describe the humidity control index, from actual measurement, commenly regarded as the 3rd theory[5].
(2) It is based on the linear relationship between the logarithm of absolute humidity and average outside temperature,which is gained from experiment observation,lacking theoretical basis and in need of theoretical arguments. (3) It is still unclear,in need of theoretical argument, what physical significancesvalue has exactly, what properties of the material it can reflect, and what factors it related to.
The existence of external pressure will merely affect the pressure of balanced vaporous water [6] slightly, which can be ignored.
When is 273.15K , changes into,and The general equation of and is (22) From the analysis above, we can conclude that bothandcan reflect the combination properties of moisture and material,which is closely related to binding energy (Moore adsorption heat or desorption heat).
Online since: June 2012
Authors: Zheng Fang Wang, Zi Zhen Chen, Yong Jun Niu, Yi Yuan Cheng
The nonmetallic inclusions can greatly reduce the strength, plasiticity, toughness and fatigue properties of material, and may become the source of cracks and stress corrosion.
As an important indicator for weld qulity evaluation, nonmetallic inclusions affect the weld properties by factors such as types, composition, content, size, distribution, etc.
On the control of the pipeline steel toughness factors[J].
Of X70 pipeline steel fracture separation analysis[J].Materials for Mechanical Engineering, 2005,29(12):21 [5] Carneiro R A, Ratnapuli R C, Lins V C.
Online since: August 2013
Authors: Meng Xi Zhang, Xiao Xiao, Zhi Guo Zhang
The engineering properties of the soils at the overlapped tunneling site are given in Table 1.
Geotechnical properties of the soils Layer No.
Table 1 gives the mechanical parameters for the in situ soils.
As we all know, so many factors, such as, vehicle loading, crowd loading, and adjacent construction vibration, can also affect the soil consolidation behaviors, which finally accelerated the long-term deformation of existing structures.
The above-mentioned influential factors do not consider in this computed method.
Online since: October 2011
Authors: Yi Zhang, Dong Ming Guo, Gui He Li
Introduction With the continuous development of the human economy, the growing demand for energy, resources, mining depth and intensity is increasing, the impact of deep coal occurrence frequency and intensity has also increased, coal and rock from the impact of disasters is often associated with coal seam - the destruction of the roof system, so you can consider using combination of coal and rock mechanical properties of compressive failure tests to explore coal-the top issue of system instability[1-3].
Accuracy of the specimen's Republic of China Ministry of Coal Industry Ministry to meet the standard "physical and mechanical properties of coal and rock determination" requirement.
Image color enhancement designed to improve visual resolution, and color categories that affect the visual resolution and contrast the two main factors.
Mechanical system will have a pressure bump instability.
CT Identification of Rock Danage Properties[J].
Online since: June 2014
Authors: Jean Yves Buffière, Erembert Nizery, Henry Proudhon, Armelle Daniélou, Samuel Forest
Introduction Among improved mechanical properties of aluminium alloys, fatigue becomes an important limiting factor for aerospace applications.
We refer to Lequeu et. al [4] for an in depth comparison of the mechanical properties of both alloys.
Particles sizeTable 1: Mechanical properties and chemical composition (wt%) of the studied plates. 0.2% yield %Cu %Zn %Li %Mg %Mn %Ag %Zr %Si %Fe stress (MPa) 2050-T8 495 3.2-3.9 <0.25 0.7-1.3 0.2-0.6 0.2-0.5 0.2-0.7 0.06-0.14 <0.08 <0.1 7050-T74 432 2.0-2.6 5.7-6.7 - 1.9-2.6 <0.1 - 0.08-0.15 <0.12 <0.15 Fig. 1: SEM-SE image of a (Al, Cu, Fe, Mn) particle with different stoechiometries corresponding to dark and light grey colours, plate in 2050, and representation of the equivalent diameter (the surfaces of the particle and the disc are equal).
The fact that Payne et al. have found different results in 7075-T651 might be explained by at least two factors: alloy composition (more Fe in 7075) and the size range of the investigated particles.
However, the initiation at matrix interface seems to only affect Mg2Si.
Online since: December 2013
Authors: Seyed Navid Seyedi, Pouyan Rezvan, Amir Hossein Azadnia, Mohd Yusof Noordin
Most of the newly introduced concretes have other chemical ingredients to enhance diverse properties.
Moreover, appropriate usage of supplementary cementitious materials such as slag cement and fly ash in concrete can play a significant role to enhance different properties of concrete.
Step 2-Selecting appropriate elements, sub elements, and influencing factors.
Step 3- Weighting the sub elements and influencing factors.
In this paper, it is assumed that weights of influencing factors are equal.
Online since: October 2015
Authors: Ján Duplák, Peter Michalik, Dušan Mitaľ, Svetlana Radchenko, Zuzana Hutyrová, Andrej Czán, Włodzimierz Makiela
Properties of surface and subsurface layers are characterized by changes in the structure; change the modulus of elasticity, which is mainly influenced by residual stresses in the surface and subsurface layers of the workpiece.
Their structure, crystal arrangement, the amount, type of shape or direction affect their properties and it has technological and commercial importance [2,8].
Fig. 2 The curve of tensile strain Fig. 3 Iron density change versus temperature [8] The tensile stress created by stretching the material under the surface of grains, thus reducing the life of the material as well as deterioration of the mechanical properties.
When compressive stress on grain pressure is applied by changing their shape and causes their strength and better mechanical properties - thereby increasing longevity [2,11-13].
Math regulation (Eq. 7) which is likewise the third step of machining conditions representing the dependency of the surface finish factor of residual stresses, wherein the correlation coefficient is more than the 80.2% and the standard deviation was 43.07.
Online since: December 2012
Authors: Algirdas Bargelis, Rasa Mankute, Dalia Cikotiene
Customers are more and more demanding to products variety, properties, quality and costs.
Framework of Workflows Development & Management on the Web Site The success of the manufacturing organization business depends on many factors but workflows quality and their interaction are decisive.
KB keeps products’ characteristics and properties and customers’ data, manufacturing cost, delivery deadlines and other specific information.
The manufacturing computational systems and virtual reality modeling of the innovative product and process employing concurrent engineering and agile manufacturing are the main factors acquiring producers’ competitiveness and advantage.
Acquired data of a section MO KB through interface 1 is analysed and used for new product properties, new materials and innovative processes development.
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