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Online since: March 2013
Authors: Q.N. Hu, D.J. Feng, H. Shu, H.Z. Dai, J.L. Wu
The system properties involve only the operating procedure of machinery processing, not concerning the cutting parameters of machine tools.
The problem can be resolved by mapping properly and sharing the maps and materials without affecting the visual effects during simulation.
Because the work is in motion, a Moving obstacle property is added on it.
Seven bounding volumes which cover the body, the arms, the left hand, the right hand index finger and thumb, other three fingers on right hand are created to describe the virtual worker and the Moving obstacle properties are also added.
Exploration of human factors experiment based on driving simulation.
Online since: July 2024
Authors: Anisya Tri Kurniawati Anwar, Dyah Ayu Nastiti, Muhammad Reza, Achmad Sjaifullah, Busroni Busroni
Factors that affect the degree of deacetylation are temperature, time, base concentration, solution with solids, type of base, and the circumstances under which deacetylation is performed [12].
The thickened chitosan solution was also added with PANi to improve the mechanical properties of the chitosan film.
The chitosan film produced in this experiment is colorless and has mechanical properties that do not tear easily, but is not resistant to water.
Structure, properties and applications,” Mar.
Alizadeh, “Preparing chitosan–polyaniline nanocomposite film and examining its mechanical, electrical, and antimicrobial properties,” Polym.
Online since: February 2006
Authors: Muhammad A. Arafin, Mamoun Medraj, Daniel P. Turner, Philippe Bocher
However, because of their susceptibility to heat affected zone cracking during welding [1], transient liquid phase bonding evolved as an effective way to join these superalloys.
For the Inconel 625/BNi-2 combination, the values of activation energy and frequency factor for diffusion of boron into the base alloy were found to be 211 kJ/mol and 0.033 m 2s-1, respectively.
The values of activation energy and frequency factor were found to be 203 kJ/mol and 0.0159 m 2s-1, respectively.
Therefore, the solid solution that forms at the end of holding period, in the region close to the joint interface, has a significant higher concentration of chromium than that of the center and, it will result into a change of mechanical properties across the joint. 0 20 40 60 80 100 120 140 0 20 40 60 80 100 Holding Time (min) M axim um Brazing Clearances (µm ) 1325K 1358K 1394K 0 20 40 60 80 100 120 140 0 20 40 60 80 100 120 Holding Time (min) M axim u m B raz in g C learan ce (µ m ) 1325K 1358K 1394K (a) (b) (d) (c) Fig. 4 Composition of (a) boron and (b) chromium in the Inconel 625/BNi-2 joint bonded at 1325K for 50 minutes.
The obtained activation energies and frequency factors for diffusion of boron can also be used to determine the isothermal solidification times during TLP bonding of Inconel 625 and 718 base alloy with any nickel based filler alloy that contains boron as melting point depressant.
Online since: August 2013
Authors: Suo Chang Yang, Yun Zhi Yao, Ying Xi Liu, De Long Feng
Research on Improved Extended Proportional Navigation Guidance Delong Feng1,a, Suochang Yang1,a, Yunzhi Yao1,a ,Yingxi Liu2,a 1Department of Missilery Engineering Shijiazhuang Mechanical Engineering College Shijiazhuang, Shijiazhuang, 050003, China 2National Key Laboratory of Science and Technology on Radar Signal Processing, Xidian University, Xi’an, 710021, China aemail:fengdelong101@foxmail.com, 2email:oliveliuyingxi@gmail.com Keywords; proportional guidance law; observability; strapdown; three-dimensional simulation Abstract—This paper proposed an improved method on the basis of the extended proportional guidance law.
So the effect of tracking filter is directly affected by guidance law.
Here, we only talk about the situation that measurement is not affected by noise pollution.
In order to enhance the system observability, we can add that proportionality factor multiply relative distance and angle of sight at the equation (10).
So the value of should be moderate to enhance the observability under the condition of did not affect other properties.
Online since: July 2021
Authors: Jaromír Drápala, Petr Jonšta, Pavel Machovčák, Silvie Brožová, Vu The Ha, Michal Madaj
Severe chemical inhomogeneity caused by macrosegregation occurred in the castings are deleterious for key mechanical properties of the components such as impact toughness, fatigue resistance, tensile strength, and it is impossible to eliminate them by any available thermo-mechanical treatment route [3, 4].
In order to produce steel castings without substantial levels of macrosegregation of alloying and with improved mechanical properties, it is necessary to develop a technique for achieving improved casting macrostructure in which area fraction of an equiaxed grain zone with finer grain structure would be maximized while a columnar grain zone would be minimized or eventually removed [5].
Hence, for elucidating mechanisms behind the disappearance of interdendritic shrinkage porosity associated with the addition of Ce in 42CrMo4Ce steel, it is necessary to consider the possible effects of the added Ce on the above mentioned factors.
Because there are important contributions of these two factors to the nucleation rates for heterogeneous nucleation [21], the dissolved Ce can have also substantial influence on the enhancement of grain structure in 42CrMo4Ce steel sample.
(5) The observed positive effects of Ce addition on solidification macro- and microstructure suggested that mischmetal addition can be considered as a potential solution for achieving better structural homogeneity and improved mechanical properties of heavy-weight castings of 42CrMo4 steel grade.
Online since: March 2007
Authors: Tetsuo Sakai, Hiroshi Utsunomiya, H. Koh, S. Minamiguchi
It is also found that the high-speed rolling is beneficial for grain refinement as well as improvements in mechanical properties.
The deformation mechanism in high speed rolling, especially the role of twinning is unclear and other factors affecting texture evolution during rolling should be investigated, because the double peak texture seems to be advantageous to plastic workability and to clarify the mechanism of evolution of double peak texture may have significant industrial meanings.
The shear deformation near the sheet surface affects the evolution of rolling texture.
Online since: March 2024
Authors: Eric Häntzsche, Chokri Cherif, Sven Hellmann, Carmen Sachse
Currently, the very limited adjustable elasticity of weft-knitted fabrics in lengthwise resp. in wale direction causes e.g. a reduction in fit and long-term properties.
The issue affects any type of weft-knitted fabric, especially in wale direction.
The single-thread variant -1T leads to thin knitted fabrics, which are suitable for the investigation of basic relationships, because the behaviour is only slightly overlaid by other factors, such as the residual stresses of the knitted fabric.
Berlin: Beuth Verlag GmbH, [5] MIKUČIONIENĖ, D.; ČIUKAS, R.; MICKEVIČIENĖ, A.: (2010)The influence of knitting structure on mechanical properties of weft knitted fabrics.
Materials Science (Medžiagotyra) Vol. 16, No. 3 [6] Fatkić E., Geršak J., Ujević D.: (2011)Influence of Knitting Parameters on the Mechanical Properties of Plain Jersey Weft Knitted Fabrics.
Online since: July 2014
Authors: Ling Yan Zhang, Wei Hong, Cheng Cai Deng, Yang Shuai Qiu
Introduction Graphite has good lamellar structure, stability chemical properties, good conductive and thermal conductivity performances and high crystallinity.
Compare with chemical synthesis process, the mechanical crushing process have many advantages.[1-3].
Therefore, the determination of the suitable media-to-material ratio without any doubt should take all the factors including mill volume, material mobility, stirring speed, motor input power and so on into consideration.
Both of the two factors above could access the crush speed and create dispersing effect, resulting in the increase of grinding efficiency.
Stirrer rotating speed directly affect the fineness of milling product.
Online since: July 2007
Authors: An Sha Zhao, Yong Xiang Leng, Guo Jiang Wan, Jun Ying Chen, Nan Huang, Ping Yang, Jin Wang, Hong Sun, X. Wu
Polymer surface modification by plasma shows significant improvement of the anti-platelet adhesion behavior as well as of the anti-bacterial properties. 1.
Stainless steel, titanium alloys and low temperature isotropic pyrolytic carbon are frequently applied as load-bearing cardiovascular biomaterials for making artificial heart valves, stents, ventricular pumps, etc., due to the advantage of their superior mechanical properties.
Therefore it is a key issue to improve the antithrombogenic properties and antibacterial properties.
Anticoagulation and antibacterial properties are simultaneously significantly improved, as shown in Fig. 5 and Fig. 6.
Immobilization of chitosan on PET improved the blood compatibility and antibacterial properties of PET.
Online since: December 2025
Authors: Hanna Tantsura, Dmytro Kolosov, Serhii Onyshchenko, Kateryna Antonova, Ivan Belmas, Olena Bilous
An anisotropic composite material with a wide range of properties can be obtained by selecting isotropic materials for its layers.
A change in belt structure affects distribution of stresses, its operational properties, and can lead to destruction.
Analysis of strength properties of conveyor belts is done in articles [20–24].
Methods Known studies of a stress state of belts of layered structure do not allow considering the influence of mechanical properties of belt layers on its stress state in a case of local change in its structure, in particular for a breakage of layer continuity.
The nature of displacements of layers and distribution of internal loading forces on them are interrelated factors.
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