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Online since: February 2022
Authors: Wen Qi Huang, Sheng Liu Sun, Li Xin Zhang, Hao Wang, Zhen Yu Chen, Chun Qian Zhang
There is a lot of related experimental and theoretical research [8-14] on the structural, mechanical and optical properties of Group-IV materials.
Therefore, it is of great significance to study the bowing factor of lattice constant of alloy materials for understanding the structural properties of materials.
Adachi, Properties of semiconductor alloys: group-IV, III-V and II-VI semiconductors, Wiley. com2009
Kouvetakis, Optical and structural properties of SixSnyGe1−x−y alloys, Applied Physics Letters, 84 (2004) 888-890
Ferhat, Unusual structural and electronic properties of SnxGe1− x alloys, physica status solidi (b), 240 (2003) 116-119
Online since: September 2014
Authors: Matthias Berger, Dennis Korff
Further, a modified mechanism with higher stiffness and improved process protection system properties will be described and compared to the current status.
The examination of the affected components suggests a mechanical overload, which mainly results due to collisions.
For example the stiffness or the moving masses are influencing factors [7].
This mechanical system operates independently of the used drive types and works energy-self-sufficient.
After the detection the control unit of the machine tool will run an emergency stop to support the mechanical protection system.
Online since: March 2017
Authors: Jozef Bárta, Katarína Bártová, Mária Dománková
Output power, welding speed and focus point position were used as variable factors for DOE.
Introduction Austenitic stainless steels (ASS) are frequently used as construction materials of various components in chemical, petrochemical, pharmaceutical and nuclear power industries, because of their excellent corrosion resistance and good mechanical properties at elevated temperatures [1-4].
Output power, welding speed and focus point position were used as variable factors (Table 3) for statistical method Design of experiment (DOE).
Table 3 Variable factors limits for DOE Factors Lower limit Upper limit Output power (W) 110 150 Welding speed (mm.s-1) 30 70 Focal point position (mm) -0.6 0 Table 4 Parameters of laser welding Sample Nr.
Other factors and their combinations also affect the weld joint width, however their influence is less significant.
Online since: August 2019
Authors: Salvatore Russo, Ileana Ippolito, Claudia Bergamo
In detail, the research shows the final experimental results, related to the residual mechanical performance of pultruded samples subject to induced aging.
The aT is a basic property of a particular material.
At the end of the various tests, Strain Gauges [Fig.11] with a size of 60 mm were applied to all the specimens, a resistance of 120 ± 0.3, a measurement factor of 2.12 ± 1%.
Conclusion The research shows the final experimental results, related to the residual mechanical performances of pultruded samples subject to induced aging.
[4] Liao Kin, Carl R Schultheisz, and Donald L Hunston, Effects of Environmental Aging on the Properties of Pultruded GFRP (1998)
Online since: October 2011
Authors: B. Rajendra Prasath, Porai P. Tamil, Mohd. F. Shabir, P. K. Devan, S. Vigneshvaran
By accounting the drawbacks associated with the use of SVO, it is found that, the chemically treated vegetable oil called “biodiesel” is a promising fuel, because of their properties are similar to that of diesel fuel (DF).
To reduce the level of oxides of nitrogen, emission control techniques such as exhaust gas recirculation (EGR) [6]–[8] could be adopted without affecting the engine performance.
The important physical and chemical properties of the biodiesel were measured and compared with ASTM standards as shown in Table 1.
The calorific value is acting as one of the limiting factors to estimate the thermal efficiency.
The effects of vegetable oil properties on injection and combustion in two different diesel engines.
Online since: November 2014
Authors: Mei Bai
It analyzes the relationship between the personal factors and their evaluation scores.
Data mining techniques are helpful in analyzing the factors affecting the remote open management system [4-5]
Users’ property follows as Table 1.
The Apriori algorithm of association rules and classification techniques in data mining are introduced, for example, in “data structure” the degree of influence is mined with Aprori algorithm; the decision trees is generated with the decision trees classification algorithm, the factors is analyzed which lead to the achievement, the key areas affecting are found, and the remote open management system is improved.
Mechanical Systems and Signal Processing. 2012, 21(5): 2238-2247.
Online since: November 2012
Authors: Zong Xiang Yao, De Ping Jiang
Introduction As the “green” structure material for the 21st century, magnesium alloys possess the superiority in terms of reducing energy consumption, increasing the energy efficiency, lessening the pollution with the advantage of light, specific mechanical properties, good damping etc.
But magnesium alloys with low melting point, high linear expansion coefficient and high thermal conductivity, resulting magnesium alloys in welding process susceptible to oxidation, hot crack and wide HAZ, it is difficult to match the welding joints and parent material properties[1,3].
Due to the chemical properties of magnesium alloy is more lively, welding must be completed within 3 hours after clean-up.
Affected by welding stress, low melting point eutectic is easy to crack , forming hot cracks.
In order to reduce welding stress, thereby reducing the generation of welding hot cracks, metallurgy and technology factors should be considered.
Online since: December 2011
Authors: Ying Qiang Xu, Yu Mei Bai, Tao Zhang
The other properties required for the model are listed in Table 1.
It should be note that the properties of materials at room temperature are used.
This indicates the temperature variation is one of the factors affecting the residual stress in the system.
Progress in research on the material properties and failure mechanisms of thermal barrier coatings.
Journal of Mechanical Strength, 2001, 23(4): 393~401
Online since: October 2014
Authors: Xin Cheng Li, Yi Chen, Xiao Li Wang, Wei Xing Zhu, Yu Ting Luo
In finish rolling test, taking into account the largest factors on lamellar tearing resistant are the degree of ferrite and precipitation refinement, the finishing temperature and coiling temperature are chosen to be examined to investigate its impact on lamellar tearing resistant.
Fig.3 Relationship of grain size, precipitates size to wz are shown respectively By analyzing the test results, the degree of refinement of the microstructure and TiC precipitation play a key role in affecting of the material properties.
Effect of Rolling Process on Microstructure and Mechanical Properties of EH36 Ship Plate Steel [J].
Materials for Mechanical Engineering, 2010(05) [4] Joonmo Choung, Chun-Sik Shim.
Research on Effect of Hot-rolling Temperature Optimizing on Improving Cold Rolled Sheet Deep Drawing Property [J].
Online since: July 2014
Authors: Qin Huan Cui, Shi Guo Sun, Ya Nan Yi, Lu Jin
The production states can affect the company's economic benefit.
Safety factor is calculated by iterating, is the solution when .
Table 1 Parameters of faults and physical properties of rocks C (Kpa) Φ(°) (KN/m³) E(Mpa) μ rubble 26 26 16.5 1038 0.15 sandstone 109.44 29.75 26.2 1520 0.14 killas 147.06 28.05 27.8 1192 0.21 shattered fault zones 20 23.8 22 88 0.26 quartzite 148.2 29.3 27 1798 0.24 The sliding surface search of critical state for present slope.
Including quaternary diluvial layer adopting the mechanical parameters of sandstone, carbonaceous mudstone and extrusion belt adopting mechanical parameters of fault fracture zone, mixed zone cladding on the slate using the mechanical parameters of gravel.
Its main advantages are that it can eliminate the influence of artificial factors, ensure the actual reliability of the evaluation, and avoid the same project with different evaluation conclusion by different technical personnel.
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