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The mechanical properties are as follows: Mass density: 7800kg/m3; elastic modulus: 2.02 e +11 Pa; Poisson's ratio: 0.3; yield limit: 310MPa; intensity limit: 570MPa.
Considering the dynamic load and other unknown factors, take.
Each rod bears 1/4 of the total working load, and the residual preload is taken 20% of the preload according to mechanical design theory.
It is noted that this force is the pressure, though it is big, it will not affect the fatigue life of the beam because the pressure makes the fatigue crack to close.
The stress is bending stress which seriously affect the beam lifetime, and the 1st principal stress value is about 120 MPa.

All of the mentioned properties are summarized in Table 1.
Sandwich composites are interesting for offshore applications due to their high strength-to-weight ratio and adaptable mechanical properties.
Observations showed that thicker CFRP corrugations offer properties that are similar to those of aluminium honeycombs.
In order to better characterize the response of such solution, it is recommended to assume different connector properties and to model the connection in more detail.
Acknowledgement This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007633.

However, back analysis is an efficient method to evaluate mechanical parameters.
Although numerous engineering examples had confirmed that the multilayer feed forward network was an effective neural network model, but there were two important factors directly affecting the predictive ability of the network.
Using the orthogonal design and uniform design method to create the samples of rock mechanical parameters to be trained.
Table 1 Material property of V grade surrounding rock and retaining structure Name Type E(Gpa) μ C(kPa) Φ(0) (Kg/m3) Surrounding rock isotropic 1～2 0.35～0.45 50～200 20～27 1900 Linear isotropic 30 0.2 / / 2500 Bolt isotropic 150 0.3 / / 7700 3.3 Sample designed of the mechanical parameters For establishing the accurate nonlinear mapping prior relationship between mechanical parameters of surrounding rock and displacement, a certain number of samples of the neural network were needed to be trained[6-8].
This paper adopted the orthogonal design and uniform design method to create the samples of rock mechanical parameters to be trained.

Introduction Poly(vinylidene fluoride) (PVDF) has received great attention as a membrane material with regard to its outstanding properties,i.e.high mechanical strength, thermal stability, chemical resistance, as compared with otherpolymeric materials.
Additional organic materials that canimprove PVDF membrane properties include polymethy acrylate (PMA) [6,7], polyvinyl acetate (PVAC) [8], and cellulose acetate (CA) [9].The addition of organic hydrophilicmaterials can improve some properties of membranes, but reducesmembrane strength.
And the effect ofthe 1, 2 - propylene glycol contentand coagulation bath temperature on properties and structure of PVDF membranes was investigated.
Mechanical Properties Measurement.
The membrane thickness is determined by the phase separation process, which is mostly dominated by two factors, i.e. thermodynamics and kinetics.

The basic property of this grating is that it becomes a narrow band optics filter with the centre of resonance wavelength.
Fig.1 FBG sensing principle Within all of external factors which cause FBG wavelength drift, the most direct is deformation, because whatever stretching or compressing to grating will be bound to cause grating period to change.
It provides the most basic physical property to make optical deformation sensor with optical FBG.
When leakage happens, the optical fiber nearby is affected by the leaked high pressure gas, which causes the fiber to bend and tremble.
[2] Zhou Zude,Tan Yuegang,Liu Mingyao,Actualities and Development on Dynamic Monitoring and Diagnosis with Distributed Fiber Bragg Grating in Mechanical Systems, Journal of Mechanical Engineering, Vol.49, no. 19, (2013), p.55-69

This paper mainly analyzes the influencing factors of stability of side slope of the tunnel entrance and failure mode of side slope and puts forward the corresponding control measures to ensure the safety of the tunnel construction.
But when there are clay layers on the cross section of the side slope, groundwater will affects not only the stress field of the rock but also the strength of the rock, resulting in a loss of stability of rock mass.
Its stability mainly depends on the combination relations of structural planes and their mechanical properties.
This paper probes into the influencing factors and countermeasures of the stability of the tunnel entrance slope and hopes to provide theoretical basis for practical engineering.
About the Influencing Factors and Control Measures of Tunnel Entrance Side Slope Stability[J].

A study on the coating of acupuncture needle with bioceramics to improve insulation performance Man Tae Kim 1,a , Hyup Jae Chung 2,b , Gyu-Seok Choi 1,c Yong Bae Kim 1,d and Kyong Yop Rhee3,e 1 Gumi Electronics & Information Technology Research Institute, Gumi, Korea, 730-853 2 Graduate School of Mechanical Engineering KyungHee University, Yongin, Korea, 449-701 3 Industrial Liaison Research Institute, Department of Mechanical Engineering, College of Engineering, KyungHee University, Yongin, Korea, 449-701 a giggiscan@naver.com, bjhj819@paran.com, cgschoi@geri.re.kr, dybk@geri.re.kr e rheeky@khu.ac.kr Keywords: Acupuncture needle, Insulation, Bioceramic, Plasma spray Abstract.
The results also showed that the heat conduction of heat-acupuncture needle was significantly affected by the bioceramic coating on the needle.
The heat-acupuncture therapy, which is applied heat by heat source, affects autonomic nerve and secretion, which strengthens the immunity system of body.
The thermal properties of silver and coating materials used in this study are represented in Table.1.
(a) Case 1 (b) Case 2 (c) Case 3 Fig. 3 SEM image of needle surface of three cases The condition of coated surface is an important factor in the coating quality.

Study on the Property Dynamic Filtration Performance of Anthranilic Acid Copper in Environment Engineering Wang Xiaojing, Wang Fan, Jin Ji Tianjin University school of chemical engineering and technology,Tianjin 300072 Keywords: Anthranilic acid copper; Solid-liquid separation; Rotary filter press; Filtrate rate; Abstract.
The shaft was mechanical seal(Structure of filter chamber as shown in figure 1).
Fig.6 Recovery effect of the filtration fabric in situ cleaningFig Fig7 Recovery effect of the filtration fabric by disassembling the machine Conclusions In this paper, the industrial fabric is used as filter media of rotary vane dynamic filter press and we explore their dynamic filtering properties withregardto increase in the concentration process for saccharin production process anthranilic acid copper solution of the Filter.
Analysis of factors affecting the filtration rate can be summarized to the following conclusions: (1) By looking at the impactofdifferentoperating conditions on thedynamicfiltration rate, anthranilic acid copper solutionin this experimental systemcan be suitable in dynamic filtration processoperating conditions: Rotary vane rotation rate n is selected for 1000~1200r/min.

- Strength and durability were also factors in the decision to employ Bamboo Fiber Reinforced Epoxy Composites (BRFEC) by Irwan, A.P., and I.W.
- Banana kenaf hybrid fiber composites' mechanical and physical properties were investigated by A.
We also used a "creep test" to see how relaxation stress affected the prosthesis. 3- Used an analytical solution to evaluate the mechanical properties with different reinforcement effects. 4- This review focused on natural fibers because they are so important and feature good mechanical properties.
McMahon, Lower Limb Mechanical Properties, Sport.
Hamad, Effect of Weathering on Some Mechanical Properties of Prosthetic Composites, Mater.

Because of different physical and mechanical properties, material removal mechanisms of the three kinds of engineering ceramics present different characteristics, which lead to the different surface roughness even though under the same lapping conditions.
On the other hand, the mechanical properties of workpiece materials also have important influences on the surface quality [7].
The properties of test materials are listed in Table2.
Single factor test method is used in the research.
From this, the structure and mechanical properties of material have an import effect on lapped surface, even over the effect of lapping parameters.