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In the present work, three dimensional finite element analyses have been carried to understand the effects of adhesive properties on active repair performance of a cracked aluminium plate under mode I.
The present study investigates the influence of adhesive properties on active repair performance using piezoelectric actuator on a cracked aluminium plate subjected to a uniform tensile stress under Mode I linear-elastic fracture mechanics (LEFM).
Numerical Fracture Analysis 3.1 Material and Geometrical Properties Fig. 1 shows the specimen used in the present study.
Table 1, shows the material properties for the aluminium plate, adhesive, boron/epoxy, and piezoelectric actuators.
The results showed that the adhesive shear modulus affects the active repair efficiency significantly.

The main factors affecting the movement and deformation of the surface (1)Ratio of mining depth and mining thickness Different mining seam thickness, resulting in subsidence gob collapse of overlying strata with different crack height, with a high degree of surface collapse crack forms and degrees of movement and deformation damage plays a decisive role
(2)Mining methods and roof management methods Mined subsidence processing methods are mainly based on the top floor and the mechanical properties of rock layers composition, thickness coal seam, the special requirements of the ground (rivers, railways, buildings under mining) and other factors to select [2]
Depending on the different risk factors that impact on the natural gas pipeline, and now scores of the factors given in Table 1-2 were mining methods, ratio of mining depth and thickness, overlying lithology, subsidence gob formation time, the level of distortion , tilt effect radius, and the sinking value of the mined subsidence type score.
Inflection point offset d = 0.05H, subsidence coefficient =0.8, mainly affecting the tangent tgβ = 2.0, horizontal movement coefficient b = 0.25[7].
(2) Using AHP to the previous analysis of influencing factors evaluation, building subsidence gob gas pipeline risk assessment system

In the casting process, there are several factors that affect the quality of casting products, including raw material, compositions, mold sand quality, drainage systems, melting systems, pouring conditions, and finishing products [3].
Casting defects such as hot tearing also commonly found in casting products, the defect will affect the material properties [4,5].
The advantage of the casting process produced some products with a complicated shape and size that close to the original products, simplifying the production process, and the mechanical properties are usually isotropic structure.
One material category was selected and would be expected to obtain the same composition of recycling alloy which affects the physical and mechanical properties of the material.
Eman, The Influence of Different Casting Method on Solidification time and Mechanical Properties of AL- Sn castings.

The effects factors of system experiment are studied and analyzed, including the misalignment and the rub-impact stiffness on system responses.
Those are the two aspects of rotating shaft-mechanical seal system, that is to say in this system, characteristics of liquid film are influenced by movement of rotating shaft and seal rings, characteristics of rotating shaft and seal rings are also affect characteristics of liquid film.
For systematically solving dynamic performance of rotating shaft-mechanical seal system influenced by rotating shaft, this paper investigate on the interference factors by experiment including rotation ring and stationary ring of the mechanical seal and coupled between the both.
The sealing performance of mechanical seal is studied when the rotating shaft is under steady excitation and excitation of excitated frequency disturbed in different working state and these disturbing factors lead misalignment, rub-impact and so on.
Properties of clear polyurethane films modified with a fluoropolymer emulsion.

Furthermore, the finite element analysis was used in determining the stress intensity factors of CTS specimen.
However, the fatigue crack growth behavior under the mixed mode state is affected by KI, KII and various other factors.
Using the finite element method, the stress intensity factors for mode I and mode II of the CTS specimen were determined.
Tables 1 and 2 summarize its chemical composition and mechanical properties, respectively.
The elastic properties of the material are shown in Table 2.

However, there were no systematic investigations on the key factors of the surface treatments to control such ability.
In this work, three factors are studied for their roles in controlling Ca-P precipitation in SBF: surface roughness, surface chemistry and surface energy.
Titanium and its alloys have been extensively used for orthopedic and dental applications for their excellent mechanical and biological properties.
It will be greatly useful if we can identify the factors which are crucial for enhancing the ability of Ca-P formation on titanium.
This work was the experimental study to identify the factors controlling Ca-P formation on titanium substrates.

Sarath Menon1,b 1Naval Postgraduate School Department of Mechanical and Aerospace Engineering 700 Dyer Road Monterey, California 93943 • USA a tmcnelley@nps.edu , b skmeno1@nps.edu Keywords: Friction stir processing, Homogenization, Microstructure refinement, Mechanical properties, Superplasticity Abstract.
In this paper further background on FSP will be summarized and the potential for microstructure homogenization and grain refinement leading to improved mechanical and physical properties in these cast metals will be outlined.
Details of the material and its composition and mechanical properties under conventional processing conditions have been reported previously [13,15].
These data highlight the beneficial effect of FSP on SZ properties: ultimate and yield strengths are increased by 2× while ductility in increased 3×.
Summary FSP provides a method to achieve localized control and modification of microstructures and properties of cast metals.

Then by using the tools of phase trajectory map, Poincare section and bifurcation diagram respectively, structure of the proposed model is identified, meanwhile, the properties of bifurcation and chaos are judged.
In other words, a nonlinear dynamics model must be employed to analyze the dynamic properties of the system.
In addition, the dynamics properties of the feed system are revealed as the stiffness is low or the support at both ends in varied.
And the dynamical behavior, processing quality and efficiency of the machine tools will be directly affected by this performance.
The feed system will become single degree of freedom system by means of identify factors of rotatable parts with moving parts of workbench.

The increasing of temperature leads the diversification of materials physical properties and causes a marked reduction in mechanical property [2].
Taking into account the effect of the material non-linearity on the mechanical properties of the PCB, the material parameters of the PCB should be set different material parameter values for changing temperatures during the analysis process.
Obviously, the non-linear factors of the PCB material parameters lead to lower natural frequency of the PCB.
The change of temperature may be the reason, which lead to the diversification of materials physical properties and cause a marked reduction in mechanical property.
Secondly, the changing of temperature causes the diversification of materials physical properties and a marked reduction in mechanical property.

The thermo-mechanical properties of granular materials with macroscopic particle sizes (above 1 mm) have been investigated experimentally and theoretically, but knowledge remains limited for materials consisting of micro/nano-sized grains.
Heat transport in these energy systems is a key issue necessitating extensive research to 1) establish a fundamental understanding of the thermo-mechanical properties and 2) provide useful knowledge for process optimisation [1-3].
Due to heterogeneous material properties, complex packing structures and various inter-particle interactions, different theoretical methods have been developed to study the heat transport mechanisms and the influencing external factors [4, 5].
To realize a useful type-III model, a proper description of the unit cell combing different heat transfer mechanism and external factors is required.
Due to the consistent material properties of the two contact hemispheres, the nano contact region is considered to have the same thermal properties as the bulk material.