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Design and Researches on a Special Drillbit of Drilling Carbon Fiber Reinforced Plastics Bijin Wu 1, a, Guohong Yan 2, b, Yousheng Li 2, c, Zongming Huang2, d, Xiaofan Yang1, e 1College of Mechanical and Energy Engineering, Jimei university.
Many studies show that the drilling thrust force is the main cause of drilling defect, and the cutting parameters and the materials and shapes of drillbit are the main factors affecting on the thrust force [5, 6, and 7].
However, the chisel edge effect on the thrust force will be affected by the rotational speed of the spindle.
These properties will not only extend the cutting life but also improve the drilling quality.
Third, the diamond coating materials can still normal cutting at high temperature because its high hardness, wear resistance, stable chemical properties and low coefficient of friction, so the cutting edge is durable.

The interfacial structure and adhesion of TiAl3 and the metal matrix can have significant effects on their performances, but factors which control interfacial properties have not been fully examined because of the experimental complexity.
Interfaces 3.1 Model geometry The ideal work of adhesion (Wad) is a key to predict the mechanical properties of an interface, which is defined as the energy needed to reversibly separate an interface into two free surfaces, neglecting plastic and diffuse degrees of freedom.
The initial configuration is shown in Fig. 1. 3.2 bulk and surface properties of (001) TiAl3 slab To assess the accuracy of our computational method, in particular of the pseudopotentials used, we performed a series of calculations on the bulk properties and (001) surface of TiAl3.
It is known that the adhesion properties of thin films can differ significantly from those of thicker ones.
We also calculated the bulk and surface properties of Al and TiAl3.

Significant research has been dedicated to ductile phase toughening of MoSi2 [11-15], and high temperature mechanical properties of molybdenum and niobium silicide based composites [9,16-22].
The critical microstructure-related parameters affecting the mechanical properties are also included in Table 2 for their easier correlation.
Mechanical properties of molybdenum and niobium silicide based materials.
SEM (BSE) images of the indentation crack paths in: (a and b) NSM1 and (c) NSM2 composites. 10 μm (a) 5 μm (b) 10 μm (c) High Temperature Mechanical Properties.
Buch: Pure metals properties: a scientific technical handbook, p. 176 (ASM International, Materials Park, OH 44073, USA 1999)

The parameters n,m,A1,A2,E1, and E2 are constants dependent on the specific choice of curing kinetic model and material properties.
Also, thermal properties such as specific heat and thermal conductivity as dependent functions of temperature and cure level can be defined in the subroutine UMATHT by the users.
The values of the thermal properties of the three tire compounds were obtained from the hot disk TCA method for the thermal conductivity.
The above properties are summarised in Table 1.
Table 1 Values of material properties used in the simulations.

Because of its singular thermomechanical properties, the SMA’s are also considered functional smart materials [2].
The particular properties of SMA suggest their use as actuators, via Shape Memory Effects, or as dampers, using the hysteresis to convert mechanical vibrations to thermal energy.
The crack growth rate for NiTi, da/dN, is higher at a given stress intensity factor DK, that for stainless steel 316SS, or for Ti-6Al-4V alloy, but the singular properties of NiTi blur this difference when considering the ratio of stress intensity factor to elastic modulus (see fig. 29 and 30 of ref. [21]).
Fasching: A study of the effect of diameter on the fatigue properties of NiTi wire.
Particular properties of NiTi for damping of stayed cables in bridges.

This alloy has several properties superior to those of Ti–6A1–4V, such as higher tensile and fatigue strength, better heat treatability, superior mechanical properties and a lower superplastic formability temperature [6,7].
The high temperature deformation of metal is a thermal activation process, which is affected by the deformation temperature, strain rate and other factors.
The isoline shows the energy dissipation factors, and the digital is the numerical value.
Materials properties handbook: titanium alloys.
Microstructure and mechanical properties relationship of β-rich titanium alloy.

The presence of amine side chain in the molecule might contribute on improving hydrophilic properties of AGO compared to GO.
However, many factors influence the quality of clean water so now water contamination becomes a serious issue among various environmental problems.
Generally, the effectiveness of any adsorption process mostly depends on the physicochemical properties of material that used as adsorbent.
The dispersibility of AGO derivative in polymer matrix is an advantage in preparing rGO/polymer composite since homogeneous dispersion is the key to improving the mechanical properties of material.
Recent report on AGO was mainly focus on exploration of its electronics properties [4].

It is known that fatigue life is an import property and it affects the service life and security of devices strongly, so that understanding and obtaining right residual stress on machined surface is an important aspect of machining quality.
It is mainly induced by the mechanical, thermal and chemical impacts during the machining process.
These impacts are acting togeter with overlapping effects on mechanical parts.
This is because the production of residual stress is connected with the factors, such as the degree of unrecoverable plastic deformation on the outside layer material of workpiece, the cutting temperature, etc.
(2) Experimental results show that pre-stress hard turning can get a fine surface quality of mechanical part.

Effects of Varying Boundary Conditions on the Buried Pipelines Ouk Sub Lee1,a,∗ and Dong Hyeok Kim2,b 1 School of Mechanical Engineering, InHa University, Incheon, 402-751, Korea 2 Department of Mechanical Engineering, InHa University, Incheon, 402-751, Korea a leeos@inha.ac.kr, bkdonghyeok77@yahoo.co.kr Keywords: Reliability Estimation, Probability of Failure, FORM (first order reliability method), Buried Pipeline, Corrosion, Boundary Condition.
Furthermore, the effects of distribution types of random variables affecting the strength of buried pipelines on the probability of failure and the reliability of the buried pipeline are systematically investigated.
There are several parameters that may affect corrosion and the reliability of pipelines.
However, because the protective properties like oxides are improved as the corrosion proceeds, the corrosion rate over time is reduced [13].
The Weibull distribution is commonly used to describe material strengths and time to failure of electronic and mechanical devices and components.

The Shape Memory Effect on Ni-Ti thin films is strongly dependent on several factors: (i) chemical composition of the matrix, (ii) presence of precipitates and (iii) preferential orientation.
Ni-Ti alloys derive their unique nonlinear and anisotropic mechanical behavior from stress-induced martensitic transformations, where the resulting strains are affected by crystallographic orientation.
Texture is known to influence the mechanical, magnetic and thermoelectrical properties of the films.
Bhattacharya and Kohn [5] have argued that crystallographic symmetry is a very important factor in determining the recoverable strains in polycrystals: alloys which undergo small change in symmetry (cubic to tetragonal or trigonal) have virtually no recoverable strains in polycrystals, while alloys which undergo large change in symmetry (cubic to orthorhombic or monoclinic) always recover at least some strain even in polycrystals.
Experimental set-up for in situ XRD The texture evolution during deposition is clearly affected by the substrate type and the ion bombardment of the growing film.