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In two end face of piezoelectric ceramic coated electrodes , compressive stress in the thickness direction, the piezoelectric equation is In this equation: D is the component of the electric displacement thickness direction, numerical value is equal to the electrode on the polarization charge density, (Q is charge of production of ceramic chip, S is the size).is the normal stress of the thickness direction ,(F is applying force on ceramic chip );is the electric field intensity; is the piezoelectric constant;is the dielectric properties coefficient of piezoelectric ceramic.
After the reduction available: (3) According to the equation(2) with equation(3): The voltage value Control system The most important technology of assembly machine is to provide a stable torque for the piezoelectric transducer nut so that it can complete the installation, because the stepping motor has the characteristics which working status is not easily affected by various interference factors, angular displacement is proportional to the input pulse number strictly, motor running without accumulated error after a week, fast dynamic response, easy to stop[4],the system selects the stepper motor.
As shown in Fig. 6 ,with the increase of the voltage ,impedance is on the decline, when the voltage is 3.5 V and 4.5 V impedance, because of the result of material factors,the impedance is very high.
Mechanical design foundation [M].
Mechanical design course design manual [M].

Combinations of these factors affect wear morphologies.
On the other hand, when steel plates are used for construction machines or mechanical tools, formability is a very important material property for fabrication and safety in operation.
Regarding the effect of material factor on wear, it was reported that wear resistant properties are further improved by controlling secondary phase even with the same hardness in certain wear environment.
That is to say, not only hardness of matrix but also forms of secondary phases is influential on wear resistant properties.
Carbon content of the steels varies from 0.14% to 0.40% (No.1C~4C) to clarify the effect of hardness of matrix on the wear properties.

. +91 9884823425; Email: senthilchem8582@gmail.com Keywords: Carbon nanotube; Polymer; Nano composites; Mechanical properties; Conjugation.
Nanocomposites of adjusted multi walled carbon nanotubes (MWCNTs) installed in a polymer matrix yield a one of a kind mix of warm and electrical properties and mechanical quality.
Properties of MWNTs MWNTs have fantastic properties and are being utilized in a substantial number of business applications [3].
Significant picks up in the mechanical properties of the two films and filaments might be normal after making upgrades to the interfacial holding between the MWNTs and the polymer framework [12].
The distinguishing proof of MWNTs as polymers is precise, useful, also, essential for explore advance for MWNT applications, especially those that exploit MWNTs' unbending nature and great mechanical properties.

Unfortunately, the quality of the SLM parts is addicted by many factors, which make it difficult to achieve full density in the manufactured details.
These factors are associated with the powder properties and the process control parameters, which can be divided into three basis group: Sintered material – grain size, chemical composition, (2) Sintered parameters – scanning speed SP, laser power P, laser beam diameter D, point distance PD, hatch distance HD (3) Sintered layer – layer thickness t.
Porosity and defects of SLM elements may affect the deterioration of their electrochemical properties, and thus reduce the biocompatibility in the environment of tissues and body fluids.
Mohammed, Mechanical properties of SLM-Titanium Materials for Biomedical Applications: A Review, Mater.
Lin, Effect of Cu on microstructure, mechanical properties, corrosion resistance and cytotoxicity of CoCrW alloy fabricated by selective laser melting, J Mech Behav Biomed Mater, 81(2018), 130-141

Warping deformation is a common and challenging issue in injection molded products, affecting their appearance and performance [4].
The properties of the plastic determine the cooling process's efficiency, the plastic parts' thickness, and the injection molding process conditions.
Table 1 shows the material properties.
Tab. 7 DOE-1 Factor level table Control Factors Level -1 0 1 A.
Optimization of injection parameters for mechanical properties of specimens with weld line of polypropylene using Taguchi method.

As the remarkable feature of the Laser heat treatment process technology and the increasing of productions of the domestic laser devices, the laser heat treatment process technology was applied to the surface of the oil threaded to improve the integrated mechanical properties of oil pipe products and to extend its work life.
These technologies are very important to change the materials’ mechanical properties, heat resistance and corrosion resistance.
It has energy concentrated, rapid processing speed, small heat affected zone, little deformation, small follow-up process; 3.
It also go downs into underground deeply and is required higher strength and sealing, so the high precision and strength of connect thread are definitely requested , in addition , the shackle times is a important measurement factors of working life of pipeline production because of frequent well repaired .
Due to the outstanding feature of laser heat treatment technology and laser equipment production is more and more ripe in our country, laser heat treatment technology was used to deal with the surface of pipeline thread in order to increase integration mechanical properties and extend the working life .

With the resulting steels, we have made metallographic determinations using optic microscopy and determinations of the main mechanical properties.
The PM process offers many routes to improve mechanical properties through alloy design, increased density and high temperature sintering.
Of the factors which influence the hardenability of sintered steels it is noted their apparent density (porosity), chemical composition from the viewpoint of carbon content and alloy element and the size of austenite grains [11].
Doherty, Microstructure and mechanical properties of PM steels alloyed with silicon and vanadium, International Journal of Powder Metallurgy 48 (2012)
[9] Chris Schade, Tom Murphy, Alan Lawley, Roger Doherty, Microstructure and mechanical properties of PM steels alloyed with silicon and vanadium, International Journal of Powder Metallurgy 48 (2012) 41-50

The result shows that the mechanical properties of rocks near the bottom are subject to terrestrial stress, pore pressure and fluid column pressure.
According to the characteristics of mechanical properties of rocks in well, through the theoretical model and the finite element numerical simulation, analyze two-dimensional and three- dimensional force and find the reason for improving penetration rate, wall instability and deviation deeply. 2 The analysis of stress state and strength in surrounding rock near the bit The stress state in surrounding rock is the important factor of wellbore stability.
Rock crushing resistence ability can be affected by the changes of pore pressure.
So the bit crushing efficiency and penetration rate can also be affected.
The mechanical properties of the rock near the bottom in deep stratum underbalanced well are affected by the terrestrial stress, pore pressure, hole size and fluid column pressure and other factors. 2.

Properties of sea waves.
There are some advantageous properties in sea waves that encourage the usage of this source of energy [4], as for example: ¨ Wave energy contains much more kinetic energy compared with wind
¨ Sea waves are the result of wind energy; therefore, it may become ineffective for a period of time depending on some factors as geographical place, season of the year and other weather conditions.
This important factor affects the structure of the system and selection of the right place for this project.
Cnnclusion For designing of projects as the one proposed in this paper, we need to take care of many factors that influence the different characteristics of production.

The most significant factors influencing the transmission gearbox synchronizer rings restoring process are: stamp deforming element thickness, plunging depth and distance to a recoverable surface.
The main reason for these parts failure is loss of performance as a result of mechanical wear.
Use of welding, weld cladding and metallization to restore this group of parts is difficult because it leads to residual stresses in an applied layer, zinc burnout and deterioration of operational properties.
The most significant factors affecting a plastic deformation zone size are: thickness of a stamp’s deforming element, plunging depth and distance to a restoring surface.
Mazur, Improving the structure and properties of heat and abrasion resistant cast irons by treating them with calcium strontium carbonate, Journal of Chemical Technology and Metallurgy. 53(5) (2018) 986-989.