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They are important factors to lead to the aircraft disaster.
By using their electromechanical coupling characteristics, they can offset the harmful vibration suppression by the way to transform mechanical energy into electrical energy.
is the scale factor. , respectively, is the piezoelectric actuator chip width and the sensor chip width. ， respectively represents the beam area where is covered by piezoelectric sensor chips and actuator chips.
The control chart is shown in Fig.1, but this usually produces the control spillover problems that affect the control effect, for it people also proposed a solution.
Its mechanical model is sometimes simplified into the concentrated force and bending moment excitation at the edge of endpoint.

For reinforced concrete structures are concerned, its mechanical performances are affected by many factors, such as reinforcement diameter, spacing, position, concrete cover thickness, geometric shape and boundary condition.
But these conclusions are lack enough test verifications, analysis data for various mechanical performance of large-size flexural members is rarely.
Mechanical properties of different size components are analyzed, including bearing capacity, ductility and deformation composition.
It can be concluded that: size effect of strength due to concrete material properties will be limited.
Mechanical properties of different size components are analyzed, including bearing capacity, ductility and so on, and verifying the safety to calculation formula in code for ultimate bearing capacity of flexural members.

Nanocrystalline pure nickel (nc-Ni) was produced by pulse electrodeposition and its superplastic properties at and above room temperature were investigated.
Introduction Over the past decades, nanocrystalline materials have draw considerable attentions due to their superior physical and mechanical properties, such as high yield and fracture strengths, superior wear resistance and enhanced superplasticity at relatively low temperatures, compared to their microcrystalline counterparts [1�2].
In most cases, electrodeposition serves as an effective method to yield a modulated grain size and porosity-free finished product by adjust chemical and physical parameters, which affect nucleation and grain growth during electrocrystallization.
The main characteristic of superplasticity was known to relate to grain growth, it is very necessary to discuss the influencing factors during the deformation.
Fig.5 (b) and (c) was obtained under the same time but under static annealing and superplastic deformation of 100%, it is suggested that temperature affects the grain growth more obviously than strain at the beginning of superplastic deformation.

Correlation between the Hydrogen Absorption Properties and the Vanadium Concentration of Ti-V–Cr Based Alloys N.E.
For the electrochemical H-charging process, a low η level is preferred along with good hydrogen sorption properties.
For the pure ternaries, good sorption properties were found for x(V) = 60 only, but for those doped with Zr7Ni10 , much better properties were achieved for materials with x(V) = 20 and 40.
Kabutomori, The influence of microstructure on hydrogen absorption properties of Ti-Cr-V alloys, J.
Kabutomori , Correlation between hydrogen absorption properties and homogeneity of Ti–Cr–V alloys, J.

Modeling and Stability Analysis of Hydraulic System for Wave Simulation Jianjun Peng 1, a, Yanjun Liu 1, b*1, Yu Li 1, c and Jibin Liu 1, d 1 College of Mechanical Engineering, Shandong University, Jinan, China, 250061 a pjjsdu@163.com, b lyj111ky@163.com, c liyulyly@126.com, djibinliu@126.com Corresponding Author: Yanjun Liu, male, Ph.D., Professor.
Introduction To quantitatively describe the hydraulic wave simulation system and study the effect of elements' performance parameters on dynamic property as well as the mathematical relation among them, we established a mathematical model of the hydraulic wave simulation system .The establishment of the mathematical model can give researchers a better insight of the mathematical relation between system parameters and system performance while providing theoretical basis and methods [1] for improvement of the system.
Some secondary factors could be completely ignored by assumption while founding a complex system, which ensures both simple operation and fidelity [2] of the mathematical model.
Some nonlinear factors such as Coulomb dry friction are ignored, since they have little influence on the system.
It can be affected by input signal, load, oil pressure and oil temperature, so its transfer function is higher-order nonlinear.

However the individual/combination effects of these factors are yet to be established.
Sami Abulnoun et al also reported that synergism factor of erosion corrosion is in the order of 4.9 times that of pure erosion [2].
With ingression of sand in the water pumped each particle act as a bullet on the surface affected with corrosion inducing more erosion.
Test coupons of size 50mmx30mmx10mm were coated on mild steel and 3 samples of each type of coat were tested for mechanical properties.
The phenomenon of ‘impulsive erosion corrosion’ and ‘partial cavitation corrosion’ is to be studied in detail to have more insight into the failure modes and factors and their contribution References [1] Ramakrishna Malka, Srdjen Nesic and Daniel A.Gulino, ‘Erosion Corrosion and synergistic effects in disturbed liquid particle flow’, Institute of Corrosion Science and Technology, Ohio State University Athens USA, paper No 06594, Corrosion Science and Expo (2006). pp 16-18 [2] Sami Abulnoun Ajeel and Mohammed Abulatef Ahmed, “Study of synergy effects on Erosion corrosion in oil pipes”, J.Eng and Tech Vol26 No9, (2008)

Besides that, correction factors have been derived from the experimental investigations in micro-EDM of zirconia.
Correction factors are to be inserted to complement with equations of MRR and Ra derived in modelling section.
There were two types of AE used; gold coating and copper adhesive foil where they were chosen based on their physical properties.
Multiplying correction factors (ε) and (ψ) derived from experimental investigations have been introduced to adjust the MRR and Ra respectively in micro-EDM of non-conductive ZrO2.
Journal of Mechanical Engneering, 59 (3) (2013), pp.156-164

Explosion property of the explosive is unstable, which affect seriously mental explosion welding quality.
Because it has not flinty materials in the explosive, wax adheres to the surface of multihole and leavening particle, and wax has many good properties, such as low viscosity, and high softening point, lubricating and good toughness, which makes explosive particle has excellent external lubricating, it is equal to explosive particles adhered a layer of lubricant, so mechanical sensitivity of the explosive is low.
Table 3 Binding rate and shear force of different plate after explosion welding No compound/base plate materials Compound plate thickness [mm] Base plate[mm] Charge thickness[mm] Once ultrasonic detection binding rate[%] Shear force[MP]a 1 OCr13AL/Q345R 3 22 35 100 406 2 OCr13AL/Q345R 4 18 45 100 428 3 B30/Q345R 3 18 35 100 346 4 B30/Q345R 4 22 45 100 397 From table 3 it can see that the binding rate is 100% for OCr13AL/Q345R, and B30/Q345R compound plate, and their mechanical properties satisfy the production requirement of compound plate.
Moreover, the explosive has good flowing property, so it is easy to pave charge.
Factors affection explosion speed of explosive charges under the explosive condition.

Performance evaluation of an automobile air conditioning system using R134a Dilek Ozlem Esen Kocaeli University Technical Education Faculty Mechanical Education Department 41380 Kocaeli/ Turkey desen@kocaeli.edu.tr Keywords: Refrigeration, Automobile Air Conditioning, Exergy, R134a.
Fig.1 also indicates the locations where mechanical and electrical measurements were performed.
Thermodynamic properties of the air and R134a were evaluated using o software package for refrigeration [16-17].After finding the evaporator load, the refrigerant mass flow rate can be determined from: (4) Condenser heat rejection rate, (5) Assuming that the compressor is adiabatic, compressor power can be written as; (6) The energetic performance of the system is found by evaluating its coefficient of performance, defined as the ratio between cooling capacity and compressor power: (7) Neglecting the heat transfer with the environment, the rate of exergy change in the compressor can be evaluated as: (8) The rate of exergy change in the condenser including changes in the discharge and liquid lines due to heat loss to the ambient air can
Exergy change in the adiabatic compressor is caused by gas friction, mechanical friction of the moving parts and internal heat transfer.
Results show that condensing temperature does not affect exergy change in the evaporator as strongly as it affects changes in other compenents whereas evaporator load and compressor speed are the two factors determining exergy change in evaporator.

The materials properties required by this equation were taken from the ProCASTTM databank.
The list of experimental factors and their levels is given in Table 1 .
Letters in equations refer to the experimental factors in Table 1.
Letters on the ordinate refer to the experimental factors in Table 1.
Vol. 21B (1990), pp. 761-770 [8] Thermal Properties of Metals (ASM International, USA 2002)