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Online since: June 2014
Authors: Tian Fei Ma, Qian Chen
Its performance is an important factor affecting the vehicle braking performance, so the design and test of the regulator is very strict.
The Mathematical model of pneumatic ABS pressure regulator The performance of regulator is affected by some parts, including mechanical properties, fluid properties.
According to these properties, the mathematical model is built.
These components can be found in the library of mechanical, pneumatic, pneumatic component design, signal and control in AMESim.
The modeling and performance analysis of pneumatic ABS regulator based on AMESim [J].Mechanical and electronic, 2011 (9): 37-40
Online since: August 2013
Authors: Yu Sheng Zeng, Zhi Ming Zhu, Zu Yin Zou
Aimed to the problem of excavation and stability for a high and steep rocky slope, with the design excavation height of 90.23m, this paper grasped the engineering geological conditions and physical and mechanical properties of rock mass by such following methods as the field engineering geological survey, measuring, drilling sampling and laboratory test.
High slope deformation evolution is the dynamic system has something to do with time, because of the large excavation area and wide influence, which more easily appear damage under the outside factors such as rainfall [3-5].
Physical and mechanical parameters are mainly based on the slope engineering geological exploration results and combined with the structure of rock mass damage and weathering degree and referring to the literature value of similar projects, calculation parameters is shown in Table 1-2.
The shear stress was adjusted to the excavation slope angle concentrated at, and the plastic zone is formed in the excavation at the foot of the slope produce more pull cracks, is shown in Fig.4(c). (2)Due to the height of slope excavation is larger, unloading loose zone along the structural plane into banded distribution, loose plasmodium has the trend of decline destruction, is shown in Fig.4 (b).Slope during construction or after project completion inevitably will be affected by groundwater infiltration, groundwater will become one of the main factors to control the slope stability.
Under the action of groundwater influence factors such as the slope stability cannot be guaranteed.
Online since: May 2014
Authors: Andrzej Calka, Azdiar Gazder, Daniel Hejazi, Ahmed A. Saleh, Ayesha Haq, Druce Dunne, Elena V. Pereloma
No blistering was observed in heat affected zone samples for up to 24 hrs charging.
Development of hydrogen-induced cracking (HIC) has adverse effects on mechanical properties and service life of steels.
Simulations of coarse-grained heat affected zone (HAZ) and normalising of transfer bar (950°C, 20 minutes) were carried out using tubular furnace with either quenching or slow cooling, respectively.
Therefore, differences in grain size, volume fraction and types of the phases are considered to be the main factors determining the trend of residual hydrogen content.
Kim, Effect of environmental and metallurgical factors on hydrogen induced cracking of HSLA steels, Corros.
Online since: April 2022
Authors: Antonio Occhiuzzi, Antonio Bonati, Annalisa Franco, Erika Grasso
The effectiveness of externally bonded systems under harsh environments is also a key concern [17-22], in order to determine environmental conversion factors for design purposes.
A summary of fabric properties is reported in Table 1.
Properties of materials.
Properties of specimens
In addition, the retained tensile mechanical properties of the systems after the examination periods were the key factors to determine the influence of the long-term loading on the resistance of the IMC system.
Online since: November 2014
Authors: Shu Guang Guo, Shi Bing Sun, Ying Liang Tian
The relation between glass surface tension and the content of Al2O3 conforms to the formula Y=290+6.5WAl2O3, Al2O3 factors influence the surface tension of the glass is 6.5.
High alkali aluminosilicate glass having excellent mechanical properties, particularly outstanding strength, hardness, toughness and scratch resistance, etc.
In addition, the high alkali aluminosilicate glass have good chemical stability and mechanical properties, so it show very good application prospects in the high-speed transport, new energy vehicles, solar - power industry and other aspects[3].
Create a neutral atmosphere to the sample to avoid surface tension changes affected by the atmosphere.
Use Bashforth-Adams table [11] can be found shape factor β.
Online since: August 2011
Authors: Bing Li, Hong Rui Cao, Zhi Liang Yang
In the processing of manufacturing, the rising of temperature caused by friction heat, cutting heat, ambient temperature and other factors will lead to thermal deformation of the driving components of machine tool, so that the correct position between the tool and work piece will be changed.
Introduction A machine tool is a powered mechanical device, typically used to fabricate metal components of machines by machining, which is the selective removal of metal.
In the processing of manufacturing, the rising of temperature caused by friction heat, cutting heat, ambient temperature and other factors will lead to thermal deformation of the driving components of machine tool, so that the correct position between the tool and work piece will be changed.
Generally the inaccuracy of machine is caused by the following factors
The key point in this research is to study the thermal induced deformation and the major factors are temperature difference and material properties which are not affected by above errors, thus, we can say that the simulated temperature distribution is acceptable and could be used as boundary conditions for further structure simulation.
Online since: June 2011
Authors: Xi Peng Xu, Yan Hui Wang, Jing Lu
In SiC whisker reinforced Al matrix composite, the interface reaction significantly influences the property of the composite.
Recently, silicon carbide whiskers have attracted much more attention due to the unique combination of their excellent properties, such as high strength, high elastic modulus, low thermal expansion coefficient, low density, high oxidation resistance and chemical inertness, causing significant improvements in mechanical performance of the composites [1-3].
Compared to unreinforced aluminum alloys, silicon carbide whisker reinforced aluminum (SiCw/Al) composite satisfies the demands in strength, modulus, fatigue resistance, tribological properties and has been considered as a great potential in structural materials, aerospace and electronic industries [4,5].
Therefore, it is very substantial to understand the structure and behavior of reinforcement/matrix interface since it strongly influences the physical and mechanical properties of the composites.
There are several factors affecting the interfacial microstructure, including matrix chemistry, whisker surface chemistry, whisker morphology and thermal expansion mismatches between whisker and matrix.
Online since: March 2008
Authors: Xue Ren Wu, Hui Ji Shi, Hui Chen Yu, Bin Zhong
Whereas from the onset of the development and use of such coating, there have been much concern about possible detrimental effects of the coating and coating process on the mechanical properties and fatigue behaviors of coating/substrate system.
The differences in chemical composition between the coating and the substrate material lead to an inevitable mismatch in their physical and mechanical properties [4].
The results indicate that the presence of protective coating does affect the fatigue life of the alloy according to strain range level and temperature.
The DBTT is affected by several factors, including coating composition, coating application process, coating thickness, surface finish and strain rate [2, 3, 6, 7].
Mughrabi, in: Thermo-mechanical fatigue behavior of materials, ASTM STP 1371, edited by H.
Online since: September 2013
Authors: Thomas Nitschke-Pagel, Klaus Dilger, Michael Workowski
Introduction Cold formed and precipitation hardened aluminium alloys are of great interest in the automotive and in the aircraft industry due to their favourable mechanical properties in combination with a low specific weight.
The local heating results in inhomogeneous recrystallisation processes and at least in a strong loss of the initial mechanical properties.
As different welding processes like metal arc welding, tungsten inert gas welding or beam welding processes generate rather different softening zones, these zones may act like structural notches due to the locally varying material properties.
The term metallurgical notch refers to the abrupt changing of mechanical properties in the environment of the weld seam as a result of the applied heat treatment. [1] In use, this distribution of mechanical properties can create complex strain and stress conditions.
While the welded naturally hard samples behave like the base material, welded samples made of the alloys EN AW 6082 could not reach the mechanical properties of the base material.
Online since: June 2014
Authors: Min Zhang, Yu Xi Jia, Chuan Zhen Huang, Jin Long Liu
The Inverse Prediction for Profile Extrusion Die Based on the Finite Element Method Min Zhang1, 2,a, Chuanzhen Huang 1, 2, b, Yuxi Jia 3, c ,Jinlong Liu 1, d, 1School of Mechanical Engineering, Shandong University, Jinan 250061, China 2Ministry of Education Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Jinan 250061, China 3School of Material Science and Engineering, Shandong University, Jinan 250061, China a zhangmin2616@sdu.edu.cn, bsdu_huang2013@163.com, cjia_yuxi@sdu.edu.cn, dliujinlongfirst@163.com Keywords: Viscoelastic Fluid; Extrudate swell; Inversed simulation; Finite Element Method; Die design Abstract: Considering the extrudate swell, the polymer extrusion process was calculated by the inversed simulation based on the visco-elastic ecology theory.
There are so many factors, such as the material properties, molding temperature, and extrusion speed, which affect the results.
The area of the die lip is 21085.4 mm2.Compared to the product section area, 225600 mm2, the extruded swell ratio is 21.411%.Because of the extrudate swell affect, there are quite difference between the shape of the die lips and product section.
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