Search results

In generally, the areas affected by the foundation pit excavated depend on the plane shape, the depth and soil of the foundation pit and other factors.
In this numerical simulation the foundation pit of width is 30m and depth is 21m, and affected areas is 1.6 times the size of the foundation pit as shown in Figure 3.
Parameters in Computing By physico-mechanical properties of soil obtained from the Geotechnical engineering investigation report and some of the similar nature of the soil combined, all soil are divided into five categories, whose mechanical and physical parameters are shown in Table 1.
And many other factors cause that, such as in the actual construction process, there is some phenomenon of overbreaking of foundation pit, occasionally dynamic load affects to foundation pit by the construction vehicles passing through and so on.
The effective exertion of steel support is restricted by numerous factors, in which the different rock-soil deformation is one of the reasons that greatly decrease the supporting effect of steel support.

Functionally graded Inconel 718 processed by additive manufacturing: Crystallographic texture, anisotropy of microstructure and mechanical properties[J].
A critical review of pow-der-based additive manufac-turing of ferrous alloys: Process parameters, microstructure and mechanical properties[J].
Optimization of selective laser melting parameters and influence of post heat treatment on micro-structure and mechanical properties of maraging steel[J].
Microstructural evolution, nanoprecipitation behavior and mechanical properties of selective laser melted high-performance grade 300 maraging steel[J].
Study of mechanical properties and heat treatment of the 18Ni300 maraging steel manufacturing by selective laser melting[D].

A ceramic core with very precise and complex shapes must have excellent properties such as dimensional conformity, mechanical strength, thermal shock resistance, thermal stability, chemical inertness against the super alloy, enough mechanical weakness to prevent the generation of cracks or recrystallizations in the single crystal blades.
The effect of mullite fibers on the properties and microstructure of fused silica-based ceramic core material, including flexural strength and leachability, have been investigated.
Another factor was cristobalite content of ceramic core after sintering.
Conclusions In this work, effects of mullite fiber content on microstructure and properties of fused silica –based ceramic cores had been investigated.
[6] Rui Zhang, Yexia Qin, Pan Wei, Influence of Al2O3 fiber on the properties Al2O3-based Ceramic core, Rare metal Materials and Engineering, 36(2007),675-677

Due to the combination of these good properties, porous ceramics have been widely used as thermal insulators.
An investigation on the relationship among phase compositions, properties and microstructure is presented.
Three specimens at least were used to determine the average of those properties.
Mechanical strength and thermal conductivity.
The 40 mol% mullite specimen has the best combination properties.

Abstract In the present work, an attempt has been made to analyze the factors influencing tool wear while milling Al/Al2O3/Gr particulate composites.
The regression equations obtained for the response factors by using multiple regressions for tool wear is given below.
· Analysis of variance for the developed model for milling characteristics revealed that the main significant factors that affect the tool wear is speed and feed respectively.
References [1] A.Arun Premnath, T.Alwarsamy, Evaluation of Mechanical Properties Of Aluminium Alumina Composites, International Journal Of Mechanical And Materials Engineering. 8 (1) (2013) 9-13
[3] K.Palanikumar, R.Karthikeyan, Assessment of factors influencing surface roughness on the machining of Al/SiC particulate composites, Materials and Design. 28 (2007) 1584–1591

However, the dielectric properties are also affected by the other factors such as mechanical, electrical, thermal and environmental stresses during its operation [4, 5].
This is due to the environmental, electrical factors, humidity and the geometry of the insulator.
Although it is a new material, the factors contributing to the conductivity of the insulation system must be considered correctly.
Conductivity of the insulation material affected the magnitude of PDC measurement.
Gockenbach: Calculation and Measurement of Dielectric Response Function in Insulation Systems of High Voltage Rotating Machines, Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials, (2003) June 1-5; Nagoya, Japan

These properties prevent the A2024 droplet spray.
Oxygen content is the important factor which affects the droplet spray.
Oxide changes the properties of liquid A2024, and this change retards molten A2024 spray.
There are three main factors for this phenomenon.
The third factor is deposition distance.

Carbon fiber reinforced polymer (CFRP) is commonly used in many industries such as sports equipment, aerospace and automotive industries because of its particular properties of low weight and high strength.
Introduction Over the years, composite materials such as carbon fiber reinforced plastics (CFRP) have been used in many industries, due to the unique properties of carbon fiber reinforced plastics with low weight and high strength [1].
The drilling conditions, cutting speeds and feed rates as experimental factors were set at different levels, as shown in Table 3.
The range of factors in this table was selected from the usage range recommended by the manufacturer and previous research [11, 12].
Cong, A review of mechanical drilling for composite laminates, Composite structures. (2012) 1265-1279

Palanikumarr 3, c 1Dept. of Mechanical Engineering, Sathyabama University, Chennai, India. 2 Dept. of Mechanical Engineering, Jeppiaar Engineering College, Chennai, India. 3 Dept. of Mechanical Engineering, Sri Sai Ram Institute of Technology, Chennai, India.
MMC are materials which combine a tough metallic matrix with high strength ceramic reinforcement to deliver superior properties like wear résistance, high strength to weight ratio, low sensitivity to temperature change and corrosion resistance [1].
The built-up edge is mostly mechanical than physical, which can be eliminated if proper cutting conditions are introduced.
Drill torque vary with feed rate, feed rate affects drilling forces and wear, but cutting speed has no significant effect over the range of speeds. 4.
Feed rate is the main factor, which influencing the torque force in the composite material.

Because of large ground pressure and difficult to shape of field core-drilling when sampling, complete massive coal and rock samples of uniform mechanical properties and uniform lumpiness were sampled in the field, brought back to laboratory and further made into standard specimens.
Sample were made according to the relevant regulations of our coal industry standard 《Methods for determining the physical and mechanical properties of coal and rock》GB/T 23561.1-2009 ~ GB/T 23561.16-2010.
Sample precision should meet the relevant regulations of《Methods for determining the physical and mechanical properties of coal and rock》, that the nonparallelism of two ends was less than 0.05mm, the deviation of samples’ height and diameter was less than 0.3mm, the deviation of samples’ axis perpendicularity for the end was less than 0.25°.
Bursting liability of rock refers to properties of rock deformation energy accumulated and the production of bursting destruction.
(2)When deep mining the Zhuji coal mine, the countermeasures of coal such as the previous water injection, hole-drilling method and blasting distressing can effectively change the physical and mechanical properties of coal and rock, decrease or release the elastic potential energy accumulated of coal and rock, slowdown or eliminate the bursting resistance.