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Mongkolwongrojn3, c 1, 2, 3 Department of Mechanical Engineering King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand asountaree.t@bu.ac.th, bs0060102@kmitl.ac.th, ckmmongko@kmitl.ac.th Keywords: Rough Surface, Modified Reynold Equation, Non-Newtonian fluid, Multigrid method.
Simulation results show surface roughness amplitude has significant affected the film pressure in the contact region.
Table 1 Material data of the ball and plate Material Property Ball Plate Modulus of Elasticity, GPa 200 200 Poison Ratio 0.3 0.3 Density, kg/m3 7750 7750 Combine Amplitude Roughness, µm 0.15 Table 2 Property of lubricant [9] Lubricant Property PAO-100 Inlet Density, kg/m3 834 Low Shear Strain Rate Viscosity, Pa-s 0.0698 High Shear Strain Rate Viscosity, Pa-s 0.00 Time Relaxation, s 4.657x10-7 Power Law Index 0.625 Viscosity-Pressure Index 0.3917 Fig. 1, Fig.2, Fig.3 and Fig.4 show the film pressure profile and film thickness in the contact region under w=1,500 N, V=1.25 m/s and the combined surface roughness amplitude, Rrms=0.15 μm.
For rough surface, the surface roughness profile, and surface asperity have significant affected the film pressure in the contact region.
The surface roughness has significant affect to film pressure in the contact region.

Therefore, dynamic magnification factors should be multiplied to consider the effect of the high mode.
Put every equivalent damping ratio of each mode into the formula, and horizontal maximum affecting coefficient can be figured out.
Preliminary judgments of the number of adding storeys Number of adding storeys is influenced by many factors: needs, planning requirements, the carrying capacity of the original structure (vertical bearing capacity, horizontal bearing capacity), the total cost of investment (adding & reinforcement), time limit for a project etc.
[13] ZhangTao, WangYuanQing, ShiYongJiu, MaJiansuo, Analysis of Response Spectrum on the Seismic Properties of the Integral Structure after Adding Steel Storeys on Top of the Concrete Frame, J.
[14] ZhangTao, WangYuanQing, ShiYongJiu, MaJiansuo, Analysis of time-history on the seismic properties of the integral structure after adding steel storeys on top of the concrete frame, J, Scientific research in Sichuan building, 2006(05): 140–143

In many kinds of characteristics of microspheres, the important factors which influence microspheres various kinds of application are the size, dispersion, morphology and surface properties of microspheres [2].
Into a four-neck round-bottom flask (250ml) equipped with mechanical stirrer, condenser, and thermometer.
The thermal properties were analyzed by differential scanning calorimeter (DSC, NETZSCH 204) with nitrogen atmosphere, and the heating rate is 5˚C/min.
However, the factors that affect the particle size distributions are very complicated.
The polarity of dispersion medium is one of the most important parameters that affect the size and size distribution.

� Wear-resistant coatings increase the cutting edge radius by factors [5].
The aim of this study was to develop Si3N4-based composite materials for industrial wood cutting tools and to compare these materials with WC with respect to both mechanical properties and tool lifetime.
Mechanical properties and chemical resistance.
Results Mechanical properties.
The oxygen content in the glassy phase affects the properties of the material, including the viscosity of the glassy phase at high temperatures [17,18] and would thus improve the sinterability of this material and result in a lower porosity.

Other researchers suggested that combination CrN and Si in a multilayer can obtain better mechanical properties.
The mechanical properties of the CrSiN coatings.
What’s more, the amorphous Si3N4 formed in the coatings can also make it has advanced mechanical properties.
Combined Fig.4 with Fig.5, the coating with Si 16.28% exhibited excellent mechanical properties.
Munroe, Factors governing the mechanical behaviour of CrSiN coatings: Combined nanoindentation testing and transmission electron microscopy [J].

This leads to their premature failure associated with the formation of local washout in the wall, and necessitates the development of a test method for steel oil field pipes for corrosion-abrasive wear, taking into account both factors of abrasive wear and corrosion process factors.
Accordingly, when modeling the process of wear of pipes leading to their failure, it is necessary to take into account the main factors that affect both the nature of corrosion and the intensity of the abrasive effect of this mixture on the material of these pipes, i.e. on the conditions of their operation in the oil fields [5-12].
These factors determine the intensity of corrosion processes in the pipe material and allow to simulate operating conditions during testing.
Effect of high-temperature heating on the structure and properties of aluminum alloys in the production of drill pipes.
Influence of dynamic austenite decomposition on the microstructure and mechanical properties of pipe steel.

The weld area always has different mechanical properties than the base material, especially with regard to fatigue strength.
The design of the structure is often very difficult, because the designer should take into account the challenging formation of UHS steels as well as the finite dynamic strength properties of the welds.
The behaviour of fatigue varies in welded and un-welded material because the mechanical properties and strain in the plain material are uniform throughout the material, but in the welded material the mechanical properties are different in all parts of the joint, such as in weld metal, HAZ (Heat Affected Zone) and basic material.
The mechanical properties are shown in Table 1.
Therefore, the weld shape is a very important factor.

Physical method Mechanical disruption Mechanical treatment methods of sludge are microbial cell wall shear stress, make the release of intracellular material out so as to promote sludge acidification.
Mechanical methods are generally applicable to excess sludge treatment.
Nah studied the crack before and after the effect of anaerobic digestion using high pressure jet, the results showed that after 3 MPa high-pressure injection treatment, anaerobic digestion of SRT by the 13 days shortened to 6 days, the production of CH4 increased, VSS reduced by about 50%, and have little effect on the effect of process operation and effluent quality, which confirmed the mechanical properties to improve the effectiveness of sludge digestion.
Ultrasonication Ultrasonication is a common technique on extracting intracellular material of living cells, in recently years, ultrasonication get rapid development in the application of pretreatment of excess sludge, the main factors of effecting ultrasonication are ultrasonic frequency, ultrasonic energy, and sludge characteristics and so on.
Tiehm argue that the hydraulic shear stress is a major factor in cracked mud ultrasound.

Inconel 718, a nickel-based superalloy, features a high complex of properties owing to solid solution and dispersion strengthening mechanisms.
This work does not include the study of the way heat treatment affects the phase composition and properties, so the results refer to the products manufactured using SLM without further heat treatment.
The results of the tests showed that the mechanical properties are comparable to the properties of the specimens manufactured by the casting technology before heat treatment: σ0.2 = 477 MPa, σu = 752 MPa, δ = 33.8% [15].
The ability to control the trajectory of the laser allows using this technology for creating products with anisotropic properties in future.
The microstructure and mechanical properties of deposited-IN718 by selective laser melting, J.

Figures 1 and 2 are applications of alloy modeling tools that have the ability to predict potential phase stability issues and directly correlate to certain mechanical properties.
Fabricating large components such as rotors from large ingots requires developing predictable metallurgical microstructures that can meet the statistical design allowances for mechanical properties.
Slow cooling of superalloys from above the solvus temperature can sometimes result in coarse lamellar precipitations that would have a deleterious effect on mechanical properties.
Alloy and heat treating procedures need to be balanced to insure that mechanical properties can be achieved in thick sections.
MacKay, Design of a Creep Resistant Nickel Base Superalloy for Power Plant Applications Part 1 – Mechanical Properties Modelling, Materials Science and Technology, Vol 19, Mar. 2003, pp. 283-290