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Mani and Bhattacharya evaluated the properties of injection molded blends of starch and polycaprolactone (PCL) [2].
Temperature properties of PLA3001D and Biomax WB200 Tm (oC) Tg (oC) Suggested processing temperature ( oC) PLA3001D 200 105 140~215 Biomax WB200 200 27 180~225 Experiment Design.
The dimension of the specimen (Fig. 1) wais based on ASTM D638-2a-type IV, the standard testing method for tensile properties of plastic, since tensile tests will be conducted in the future.
L9 orthogonal array Factors No.
Other factors are pooled and treated as experimental errors.

Study Friction Between Wheel and Rail by Using Molecular Dynamics Method Qian Xiao1, a,Ming Mu1, b,Xinjian Zhou1,c,Yuxiang Che1, d 1the Ministry of Education Key Laboratory,carrying tools and equipment,East China Jiaotong University, Nanchang,Jiangxi,330013,P.R.China jxralph@qq.com,muming803@163.com,zhouxj@ecjtu.jx.cn,407318848@qq.com Keywords: Embedded atom method , Molecular dynamics, friction , wheel-rail rolling contact Abstract.Aiming at researching friction process on the influence of train rolling contact properties between the wheel and rail,using the basic principle of Molecular Dynamics Simulation and Embedded Atomic Method theory,study the areas of adhesion within the contact patch area will gradually increase along with the occurrence of the friction process,research the increase process about the areas of adhesion within the contact patch area by means of Molecular Dynamics simulation model and simulation algorithm.For the study of friction on the surface about changes
Introduction Due to the limitations of experimental methods, experimental methods can not only through a thorough understanding of the microstructure of metallic materials, material transformation, mechanical properties and its internal mechanisms.
Fig. 1 Wheel-rail contact model The Process of Molecular Dynamics Simulations Model Duilding.Between wheel and rail, there are the following factors: contact with the surface roughness, normal force size, the nature of surface contamination, the water film, film layer, temperature, relative sliding speed and so on[1].
By these factors affect the friction between wheel and rail rolling contact role, the study process to iron oxide as a molecular dynamic simulation of power ideal material, the molecular layer was40 ×40 ps.Fig.2 shows 3d molecular dynamics model.

The films made of Al2O3 and TiO2 have qualities including high hardness, chemical resistance, thermal stability, and good mechanical properties.
This phase offers enhanced mechanical properties and is commonly used in applications such as thermal barrier coatings.
These structures provide desirable mechanical properties, including high hardness, wear resistance, and thermal stability[27].
It is commonly used as a coating material due to its excellent mechanical and thermal properties.
Mechanical and physical properties of engineering alumina ceramics (Vol. 23).

Introduction Concrete cracks are caused by many factors, and the mutual influences are complex[1].
Concrete thermal stress test can simulate and control the concrete specimens in different temperature histories and different constraint degrees[6], it is possible to test the characteristics and parameters of the concrete from the curing begins (such as zero- stress temperature, the cracking temperature, stress, volume deformation, coefficient of linear expansion, etc.), it can quantitatively evaluate the cracking sensitivity of the concrete with comprehensive factors in early age.
As we know, the concrete cracking is affected by its temperature history when it is restrained.
So the development of the concrete mechanical properties such as strength, elastic modulus will be faster than general in approximate adiabatic heating mode, which overestimated the highest temperature and the cooling point of the concrete and underestimated the actual cracking resistance.
Because the chemical deformation and the creep of concrete is complicated within the different temperature processes which is not a linear relationship, the generation of stress are related to the deformation, temperature, modulus of elasticity and other mechanical properties.

Subjective evaluations include both tactile and visual evaluations [1-3], but it has been shown that factors such as subject selection and environmental conditions can affect the results obtained [4].
For this phenomenon, the theoretical formulae for the evaluation of the mechanical properties of the pile materials are extended as shown by Eqs. (2) and (3) [15,16].
Effect of mechanical properties on tactile of cotton terry cloth.
Tactility and mechanical properties of marketing towel.
Water absorption and mechanical properties of pile-knit fabrics based on conjugate N/P microfibers.

The variation in the mechanical, chemical, and physical properties of AM parts are not shortened only in parts produced on different machines but also can be obtained across parts produced by using the same 3D printer and maybe in the same singular part itself when comparing these properties along the build direction.
Some applications may include aerospace industry require consistent mechanical and physical properties, i.e., the surface profile is important for aerodynamic and drag forces performance.
The achieved melt-pool temperature is based on these factors and many other parameters like the metal type, absorption of the laser irradiation, the laser type and wavelength.
This temperature variation can negatively affect the produced part properties and imposes the need for post processing.
Effect of heat treatment on microstructure and mechanical properties of 316L steel synthesized by selective laser melting.

Figure 1 medial view of the pelvis Methods: In 3D DIC two cameras record the deformation process of a sample as it is subjected to mechanical forces (figure 2 ).
However it has been shown that the properties of the speckled pattern, lighting conditions and measurement system effect the accuracy of the DIC measurement [14].
These factors may have introduced errors into the experimental measurements.
Raimondi, Loss in Mechanical Contact of Cementless Acetabular Prostheses Due to Post-Operative Weight Bearing: A Biomechanical Model.
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 220(2) (2006), p. 299-309

The external factors create the overlap of the wave functions of trapped electrons (that are injected from metallic or semiconductive electrode) in the polymer layer and so the insulator-metal phase transition becomes possible.
Overcoming such barriers may provide external factors: normal mechanical pressure, electric field, magnetic field and so on.
Let us consider the effect of external factors used in the present work.
Normal mechanical pressure affects the magnitude of the potential barrier.
Each of these factors alone can create a narrow zone and provide the charge transport independently [7].

Rossetto1,e 1Politecnico di Torino, Department of Mechanical and Aerospace Engineering, Corso Duca degli Abruzzi 24, 10129 Torino aseyed.hasani@polito.it, bdavide.paolino@polito.it, candrea.tridello@polito.it, dgiorgio.chiandussi@polito.it, emassimo.rossetto@polito.it Keywords: VHCF; Gigacycle fatigue; Ultrasonic test; Gaussian specimen; size effect; critical SIF.
Several fundamental material properties can be estimated from the fracture surfaces of specimens failed during ultrasonic VHCF tests.
In the VHCF literature, the critical Stress Intensity Factor (SIF) is generally estimated by applying analytical SIF formulations to the typical semi-circular surface crack geometry revealed by fracture surfaces at final failure.
Introduction Critical Stress Intensity Factor (SIF) is one of the most important material properties to predict the onset of the unstable crack growth in cracked bodies.
Size effect thus affects critical SIF: the larger the size, the smaller the critical SIF.

In view of the main factor, getting the ball contact force distribution.
Material properties table as shown in Table. 1.
Ball screw material properties Name ball Surface Modulus of elasticity(GPa) 207 207 Poisson's ratio 0.3 0.3 Radius of curvature(mm) 3 4 Quality (kg) Fig. 1.
The contact stress between ball and ball screw groove is bigger than between ball and nut, and the difference of contact stress leads to different characteristics,which is one of importantly reasons that the ball screw groove wear faster,as influences the effective life of ball screw pair.Therefore,it should take contact factors into account to design ball screw pair.
Journal of Mechanical Design(2003),125, 717-733