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Moreover, its mechanical properties allow to sustain the arterial wall and to prevent the elastic recoil of the vessel after stent expansion.
The model is implemented into a FE framework using the commercial code ABAQUS/Explicit (Dassault Systemes Simulia Corp., RI, USA) by means of a user subroutine (VUSDFLD) devoted to the calculation of the damage increment through the evolution law affecting the updated stress state in the explicit time integration scheme.
This stress threshold is highly related to the following concurrent factors: the material composition, the metallurgical conditions and the corrosive environment; in literature a wide range for the stress threshold has been reported (from 30% of the yield stress to 90% of the ultimate tensile stress).
Results From the results of these experimental campaign, summarized in Table 1, ZM21 turned out to have the highest strain at break; moreover, it has comparable mechanical properties to Mg alloy WE43 used for the stent under clinical trial.
Table 1: Mechanical properties of the available alloys obtained from uniaxial tensile testing.

Viscoelastic Properties of Field-aged Cores Meng Ling1 a 1Graduate Research Assistant, Zachry Department of Civil Engineering, Texas A&M University, College Station, Texas, 77843 a mengling@tamu.edu Keywords: asphalt mixture, stiffness gradient, field-aged.
Introduction The analysis for field-aged asphalt mixtures is complex because there are some factors can affect it like the air voids, temperatures, construction method which cannot be controlled by researchers.
The direct tension test is an efficient way to obtain the undamaged viscoelastic properties like complex modulus especially for the field-aged asphalt layers.
Lytton, Characterization of the Tensile Viscoelastic Properties of an Undamaged Asphalt Mixture, Journal of Transportation Engineering (March 2010) [3] S.
Scullion, The estimation of Viscoelastic Properties of In-Situ Asphalt Mixtures Via Direct Tension Test And Overlay Test [6] W.

A variety of tubing fracture reason, such as quality of tubing, external loading environment, transportation and storage, they affect the safe use of the tubing, and quality factor is the most important factor[4,5].
Table 2 results show that the tensile properties of tubing accorded with the standard requirements, absorbed energy individual value of B# tubing meet standard requirement,and the mean low.
Conclusions Through the comprehensive evaluation the tubing materials properties, microstructure and fracture morphology, maked sure Φ73 x 5.51 mm N80 NU tubing fault was brittle fracture.
Washington DC: API,p. 71 [8] API Bull 5C2, Bulletion on Performance Properties of Casing,Tubing,and Drill Pipe. twenty-first edition, 1999.
Washington DC: API,p. 2 [9] ISO/TR10400, Petroleum and natural gas industries — Equations and calculations for the properties of casing, tubing, drill pipe and line pipe used as casing or tubing. first edition, 2007.

These disadvantageous properties caused diffusion wear and shorter tool lives.
For these factors, the machining of GH4169 should been carried out at low cutting speeds with coolant recommended for cooling the tool and work-piece.
The function of the cooling air is to flush away the chips from the cutting zone (flushing effect) and reduce the cutting temperature, which are two very important and correlated factors affecting slot milling of GH4169 [6].
It is well known that the surface finish can significantly affect the mechanical strength of components when they are subjected to fatigue cycles.
Moreover, when machining of GH4169, the temperature is very high because of its unfavorable machining properties as mentioned above, and it may cause adhesion of the residual chip (or tool) particles to the machined surfaces.

This approach facilitates a comprehensive and integrated understanding of how individual and combined factors affect the mechanical performance of adhesive joints.
Influence of Al2O3 nanoreinforcement on the adhesion and thermomechanical properties for epoxy adhesive.
Effect of alumina/graphene hybrid nano reinforcement to the adhesion and mechanical properties of adhesively bonded aluminum alloy with epoxy.
The influence of GNP on the mechanical and thermomechanical properties of epoxy adhesive: Pearson correlation matrix and heatmap application in data interpretation.
The Effects of Grit Size and Blasting Pressure on the Surface Properties of Grit Blasted Ti6Al4V Alloy.

The strain distribution and the max strain were affected by the diameter of laser spot.
Attainment of high draw ratio based on laser radiation heating might enable us to manufacture ultra-fine fibers even nano-scale fibers while the fibers could maintain excellent mechanical properties.
The fibers were tested on the DSC Q2000 (TA instruments) to measure temperatures and heat flows associated with thermal transitions and on DMA Q800 (TA instruments) to measure the mechanical properties as the increasing of tensile force in different temperature.
Figure 1 DSC curve of the sea-island fibers Figure 2 Effective stress versus true strain curves obtained as the increasing of tensile force at 25 ( ■), 100 ( ●) and 160 ( ▲) The mechanical properties of the PET/i-PP sea-island fibers in different temperature were shown in Figure 2.
The stress-strain curve in different temperature showed that the mechanical properties of fibers were sensitive for temperature.

It is at this stage that fundamental decisions are made, which can significantly affect reliability.
At the conceptual stage of design, the design team must consider simultaneously a number of multi-disciplinary factors.
Independent operation is achieved at an active interface if the variation of the force in reserve for performing each function is at a minimum) and unity (A component should have sufficient strength for the static and dynamic loads it has to carry), as significant factors of the external properties of performance, economy and reliability of mechanical systems, As shown in Fig 1.
performance reliability economy clarity simplicity unity External properties Internal properties Fig. 1 Internal and external properties and reliability links Conceptual stage is of critical importance since it is where many key issues, like cost and reliability, are fixed.
Assessing Reliability in Mechanical Systems. 2000 [4] Trond Østerås.

Material Property Analysis and Technology of Washover Permanent Packer Fan Luo1, a, Jin Yang1,b , Shubin Guo2,c 1 China University of Petroleum, Fuxue Road 18, Chang Ping District, Beijing, China 2 China National Offshore Oil Corporation, Tianjin, China aluofan0118@163.com, byjin@cup.edu.cn, cguoshb@cnooc.com.cn Keywords: Material Property, Permanent Packer, Washover Abstract.
In this thesis, the material property of pipe strings is analyzed and the axial forces, torques and frictions and other mechanical calculation models of the pipe string are established under two kinds of drive modes.
Through the results of analysis of pipe string force, it analyzes the material property of permanent packer, optimizes the parameters of downhole tools and operation methods in milling operation.
Due to a number of factors such as limited capacity of workover rigs, mismatch of related equipments, complexity of the well condition, lack of risk awareness of the deep-inclined well milling and salvaging a permanent packer, it often results in downhole accidents like drilling tools breaking off.
Milling Parameters Optimization Milling parameters primarily depend on property of downhole screw motor.

According to the experimental results, it is found that joint strength was not linear with the adherend thickness and much affected by spew fillets in overlap ends.
Material properties and model.
The mechanical properties of the adherends are E11=134GPa, E22/E33=9.6GPa, γ12/γ13=0.29, γ23=0.3, G12/G13=4.8GPa and G23=5GPa.
The mechanical properties of adhesive are E=2.3GPa and γ=0.3.
Therefore, it is the main factor that peel/shear stress concentrations at overlap region ends affect the joint strength.

The functional proteins was the key factors to determined it’s utilization value, it not only affects the sensory properties of food will also affect the processing, transport and physical properties during storage .
Functional properties of proteins not only for the source of protein, but also to a variety of processing conditions and external environmental factors, such as pH , temperature and ionic strength, etc。
The systematic study on the functional properties of CSWPC has yet to see the related reports.
Figure 2 shows the oil absorption of CSWPC is better than SPI during the temperature range, may be related to the combination ability of lipophilic group on the protein surface and the hydroxyl of lipid, but also for the molecular structure factors.
[10] Liu Wei, Study on Functional Properties of Native Water-hyacinth Leaf Protein[D], Southwest University, 2007.