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Online since: January 2012
Authors: A.A. Howe, S.V. Parker, R. Beaverstock, W.M. van Haaften
Many variables are involved in the prediction of the optimum rolling schedule in terms of productivity, plate geometry, and final properties, each of which will be associated with its own errors.
The Scunthorpe Plate Mill example in Fig 1 is of the off-line set-up type; typical usage is to scope a prospective order and devise the optimum schedule to achieve the required mechanical properties.
(a) Yield strength (b) Tensile strength Figure 2: Mechanical property predictions from the Scunthorpe Plate Mill model on CMn, HSLA(Nb,V) and intercritically-rolled steels [2].
Purely empirical factors to adjust the predictions from those of wholly austenitic deformation have been applied for plate rolling, but this does not enable a proper understanding of the effects of changes to the rolling schedule or steel chemistry on the microstructure and mechanical properties.
For mechanical properties, these are smaller than the standard A80 strip tensiles, which is known to influence elongation.
Online since: October 2012
Authors: Ju Gen Fu, Rui Xuan Luan, Yan Ting Zhang
For formulate loose blasting program and select the blasting parameters Accurately, first of all, we must sample and test the roadway rock and the roof rock mechanical properties , the measured results shown in Table 1.
The blast-hole depth should be considered the higher the efficiency of drilling and a good blasting effect, drilling equipment and the level of construction technology, labor organizations, and other factors, but also to facilitate the construct organization and management.
Blast - hole layout shown in Fig.1. 4 Charging Structure After the holes parameters and explosives species are identified, the charging form and related parameters is an important factor affecting the blast effect.
When the blast hole block length is too short, the plug material will out of the blast holes prematurely , so that the detonation gas would not achieve the "gas wedge", affect the blasting effects; When the plug material is too long, it will not only increase the workload of blockage, affect the speed of construction but also will lead the cracks cannot reach to the orifice rock, so orifice rock cannot reach the purpose of loosening, so mechanized mining machine does not work, affecting the normal production of coal.
(2) Detonating sequence affect the loose blasting effect.
Online since: March 2014
Authors: Majid Al-Maharbi, Ibrahim Karaman
It increases with T and decreases with as shown in the following equation (3) where χ is an interaction parameter between 0.1 and 1.0, b is the Burger vector of the slip system α, D is a proportionality factor of unit of stress, g is normalized stress-independent activation energy and k is the gas constant.
In equation (3), the constant k1 affects the dislocation generation during plastic deformation.
This third term affects stage IV.
Mechanical properties of the hot rolled AZ31B Mg alloy under tension and compression.
Experimental (lines) and predicted (symbols) mechanical response under tension and compression of the as-received hot rolled samples.
Online since: February 2018
Authors: Hui Fan, Yang Pei Zhao, Shan Kui Wang, Man Liu
Introduction Composite coatings has attracted extensive attention in the surface engineering, because it can bring matrix material with new performance such as abrasion, heat resistant and good anticorrosion properties[1-5].
Generally, by adding one or a few types of insoluble ceramic particles(mainly oxides and carbides powders) into electrolyte during electrodepositing, the particles added can co-deposite with matrix metal and the amount of particles incorporation affects the microstructure and properties of electrodeposited coating[1].
Generally, Al2O3 powder is among the particles with many advantageous properties, which is often used as a second phase to strengthen composite materials [3].
Consequently, jet electrodeposition is advantageous comparing to other electrodeposition methods based on the following factors.
Based on above analysis, these factors eventually lead to consolidated compactness of composite coating microstructure.
Online since: March 2015
Authors: Magdalena Popczyk, B. Łosiewicz
Different factors and their influence on electrocatalytic activity, have been discussed.
The presence of a solvent on the surface of the electrode radically changes the properties of the surface and has influence on the kinetics and the mechanism of the occuring electrode reactions.
Recent advances in electrocatalysis and interfacial electrochemistry show that these fields are rapidly expanding disciplines strongly affecting on other areas of physical sciences, and heterogeneous electrocatalysis is a core field of interfacial science [2,10].
Catalytic activity of the electrode materials in electrochemical reactions is generally related to their chemical and physical properties.
A great interest is observed in nanostructured materials, especially in nanoparticles, due to their functional properties which are generally different from those of the bulk materials.
Online since: December 2014
Authors: Deivid Marques Nunes, Fábio de Oliveira Arouca, João Jorge Ribeiro Damasceno
Introduction Due to the high level of air pollution caused by combustion of fossil fuel and the growing fleet of motor vehicles, among others, associated with several factors, such as industrial, urban and technological development, since the Industrial Revolution to the present day, it has been noted the need to study mechanisms and operations to minimize the environmental impact (poor air quality), and, consequently, the appearance of occupational illnesses.
(11) With, K is the Boltzmann constant, T is the temperature is the gas viscosity, is the Cunningham slip correction factor and P is the local pressure.
The Cunningham slip correction factor can be given by:
Hinds: Aerosol Technology Properties, Behavior and Measurement of Airborne Particles.
Hinds: Aerosol Technology Properties, Behaviour and Measurement of Airborne Particles.
Online since: October 2020
Authors: Anatoly G. Davidovsky
The Use of Polymers in Dental Implantology The prospects of using the considered coatings based on silicon compounds are determined by their dielectric properties, amorphous state that contributes to the healing of microcracks of the surface layer, the formation of a surface with improved hydrophilic properties, and optimal physical and mechanical characteristics.
It became possible to reasonably raise the issue of aging and stabilization of polymers as a multi-factor problem, where the study of changes in the properties of a polymer matherial under different conditions can be considered from a single point of view.
Therefore, the properties of a polymer matherial with a large molecular weight can be more stable.
Titanium alloys, as matherials with acceptable (but flawed) corrosion and corrosion-mechanical properties for these purposes, are widely used in implantation surgery.
It was found that polyurethanes with a simple etheric bond were more affected than polyurethanes with a complex etheric bond.
Online since: March 2007
Authors: Jilt Sietsma, Y. van Leeuwen
Introduction For certain steel grades -like HSLA steels- the mechanical properties of the final product are predominantly determined by the process control in the finishing mill.
Deformation prior to nucleation affects the nucleation equations in three ways.
The effect of the deformation on the pre-factor however, remains unclear.
The effect of deformation on the growth rate lies in two different factors.
Second, the presence of dislocation substructures may affect the mobility of the γ−α interface.
Online since: February 2024
Authors: Takeshi Gonda, Masaki Yakabe, Yasutaka Hayamizu, Shinichi Morita, Toshihiko Kawabe, Kento Nishinaka
Mechanical Design Using Open-Source Software (Eigenvalue Analysis by Parametric Study) Takeshi GONDA1,a*, Masaki YAKABE1,b, Yasutaka HAYAMIZU1,c, Shin-ichi MORITA2,d, Toshihiko KAWABE3,e and Kento NISHINAKA3,f 1Department of Integrated Engineering (Mechanical Systems Division), National Institute of Technology (KOSEN), Yonago College, 4448, Hikona-cho Yonago City, Tottori, 683-8502, Japan 2Division of Mechanical and Electrical Engineering, Faculty of Engineering, Kitami Institute of Technology, 165 Koen-cyo, Kitami City, Hokkaido, 090-8507, Japan 3Tsurumi Manufacturing Co., Ltd., 2700, Yomi-cho,Yonago City, Tottori, 683-0851, Japan at-gonda@yonago-k.ac.jp, byakabe@yonago-k.ac.jp, chayamizu@yonago-k.ac.jp, ds-morita@mail.kitami-it.ac.jp, etoshihiko_kawabe@tsurumipump.co.jp, fkento_nishinaka@tsurumipump.co.jp Keywords: open-source software, numerical analysis, parametric study, FEM Abstract.
To overcome this challenge, open-source CAE software (hereafter “open CAE software”) can be used for product development because CAE systems comprise open-source structural analysis software and mesh creation tools that do not require extensive deployment costs and achieve the same functionality as standard commercial CAE software without being limited by economic factors; this means that parallel calculations and multitasking can exist simultaneously[1].
Other than the beam length, the dimensions and physical properties of the mesh were fixed, and a hexahedral quadratic element, which was a cube of H5×B5×l5 mm was used for the mesh.
The analysis was executed on the first-order mode results, and the dimensions and physical properties were calculated using the same values as those in previous section, except for the rib thickness.
Based on the above, we can see that the pipe thickness affects the eigenfrequency by up to 10% under the current conditions.
Online since: June 2008
Authors: Adrian Bejan, Sylvie Lorente
Here we draw attention to the development of smart materials with embedded vasculatures that provide multiple functionality: volumetric cooling, self-healing, mechanical strength, etc.
As length scales become smaller, dendritic vascularization provides dramatically superior volumetric bathing and transport properties than the use of bundles of parallel microchannels.
The current literature reveals a surge of interest in bio-inspired designs of flow architectures that promise superior properties, for example, distributed and high-density heat and mass transfer.
The tube lengths decrease by a factor of 1/2, from the largest (L0), to L1 = L0/2, L2 = L1/2, etc.
The flow in all the channels is in the Poiseuille regime with constant properties.
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