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Materials The research used 3 mm-thick polymethyl methacrylate (PMMA) commonly called acrylic as shown in fig 2, meanwhile the properties of polymethyl methacrylate material can be seen in table 1.
Polymethyl methacrylate properties [5] Young modulus (GPa) 3,2 Tensile strength (MPa) 35 – 62 Elongation (%) 5 – 70 Compressive strength (MPa) 28 -97 Yield strength (MPa) 48 – 97 Thermal expansion (e-6/°C) 48 – 80 Thermal conductivity (W/m.
The measurement indicated that the cutting speed affected the gap width made which all cutting with 6-10 mm laser head distance.
The other factor which contributed to the gap width was the wind blowing from the side of the machine that spread the laser beam onto the specimen.
Besides, the engine vibration during operation also affected the difference in the resulted gap width.

The material model serves as a framework for understanding material behavior and establishes the required material properties.
In addition, material properties can be tailored to vary with temperature, thus adding further complexity to the analysis.
In a static analysis, the input data typically includes applied loads 1000 N (fig.1.a), boundary conditions (e.g., constraints and restraints) (fig.1.b), material properties (fig.1.c), and the geometry of the structure (mesh) (fig.1.d).
Modify system's characteristics (i.e., geometry, damping mechanisms, material properties, etc.) to reduce vibration effects.
The natural frequencies and corresponding mode shapes depend on the geometry, material properties, and support conditions.

It was due to the introduction of organo-functional groups, changing the polarity of the channel surface, and increasing the hydrophobic properties.
Many attentions have been payed to the outstanding adsorption properties of the organic functionalized mesoporous silica, and many valuable prospective researches have been done in this aspect [4-5].
Five adsorbents show different adsorption capacity on phenol, this is because of their different surface properties.
With high polar and hydrophilic properties, unmodified MCM-41 adsorbed a small amount of phenol, although the specific surface area is the highest up to 750.4 m2/g.
The pH of the aqueous medium is an important factor that may influence physical and chemical properties of both adsorbent and adsorbate, and thereby affects the adsorption process.

Flake alignment level (FAL) is a primary variable in oriented strandboard (OSB) manufacture that significantly affects the properties of OSB panels such as linear expansion (LE).
Introduction Considerable amount of work has been done to correlate mechanical and swelling properties of structural OSB to flake alignment [1-5].
The properties and performance of OSB can be changed relatively easily by adjusting PA.
Cumulative distribution of flake alignment angles in front and back sides for a tested commercial OSB and perpendicular directions, LE properties did not show a clear trend as PA increased.
This indicated that it was hard to control LE properties in OSB manufacture.

In this paper, the simulation heat affected zone (HAZ) continuous cooling transformation (SHCCT) curve of X90 pipeline steel was drew by using Gleeble 3500 simulator.
In conclusion, optimization control measures on the microstructure and properties of X90 pipeline steel weld HAZ are presented by above comprehensive analysis.
In this paper, the continuous cooling transformation rules of the weld HAZ for X90 pipeline steel was researched by thermal simulation method, the microstructure and hardness of weld HAZ of different cooling rate were simulated and analyzed, and the control measures to optimize microstructure and properties of weld HAZ of X90 pipeline steel were proposed, which provided a technical basis for the welding process of X90 pipeline steel.
Its chemical composition is listed in Table 1 and the mechanical properties are shown in Table 2.
Table 2 Mechanical properties of experimental X90 line pipe Yield strength Rp0.2, [MPa] Tensile strength Rm, [MPa] Elongation A, [%] CVN toughness (-20°C), [J] Vickers hardness HV10 720 812 23.0 312 254 Table 3 Parameters of weld HAZ simulation test for X90 line pipe Peak temperature(Tp):1350°C, Heating rate:100°C /s, Holding time at the peak temperature:1s Temperature, [°C] Cooling rate, [°C /s] Cooling time from 800°C to 500°C (t8/5), [s] 1350 to 900 60 - 900 to 100 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 40, 60 3000, 1500, 600, 300, 150, 60, 30, 15, 7.5, 5 Results and Discussion Fig. 1 shows dilatometer curves for weld temperature cycles with various cooling rate.

Materials and Methods Materials The parameters and properties of materials (MAT1 and MAT2) are shown in Table 1.
(a)Structual deformation vs load; (b) Frictional coefficient vs deformation Fig 7 Structure deformation (a)contact pressure for JIM1 and JIM2; (b) contact pressure vs. frictional coefficient; (c) contact pressure at center point Fig 8 Contact pressure distribution on joint interface For joint interface models, the contact pressure is affected by many factors such as material’s properties.
The properties of random surfaces of significances in their contact.
Research on model of static property of fixed joint surface.
Journal of mechanical engineering. 47 (2011), 53-58

Good crystalline of ATO thin films is necessary to improve the electrical and optical properties.
Both the electrical and optical properties have been enhanced with the increasing of laser energy density.
Therefore, good crystalline of ATO thin films is necessary to improve the electrical and optical properties.
On the other hand, pulsed laser deposition (PLD) is a convenient way to fabricate ATO thin films with precise control of composition of ATO ceramic targets [10] and the laser energy density is an important factor to affect the crystallization of ATO films.
This factor can be calculated as Eq. (1) [14]

Some properties for SCM and SCr steels cover data for a carbon content from 0.2% to 0.8% relevant to simulating carburized- or carbonitrided-quenching processes.
Factors affecting the quality of heat-treated machine parts were analyzed, and data mining was processed by evaluating the cause-and-effect-relationships to optimize the suitable conditions.
Data mining can extract important manufacturing factors controlling HT quality by classifying their contributions to the quality from this DB.
An example application of the data mining to gas-carburized hypoid ring gears installed in automotive final drive components shows that the most dominant factors for profile deviation are quenching temperature, setting position on the fixture, and oil temperature.
To optimize these extracted factors, the calculation is made using the simulation software, several DBs, and annealing method by, for example, commercial optimizing software, iSight.

Introduction When a structure is exposed to mechanical loading of compression, the structure can undergo buckling, which is a form of structural instability accompanied with a sudden and irreversible change of its shape.
Nano-devices utilizing the buckling phenomenon are drawing attention because buckling can induce large and abrupt deformation by a small range of mechanical loading.
Since carbon nanotubes (CNTs) show coupling between mechanical and physical properties, such as deformation-driven closure of band gap energy [1], they have potential for revolutionary nano-devices whose property can be switched through buckling.
In future work, we will carry out further analysis for extensive structural parameters to understand the factor affecting the behavior of buckling of CNTs, such as chirality, defect, and interlayer interaction.

The essential limiting factors for the utilisation are unevenly distributed material parameters [2] and relatively high production costs.
Less variation in the physical properties can be achieved with lattice block materials [12].
Limitations are high costs, restriction to open celled structures and anisotropic properties caused by the microstructure orientation.
Metallic hollow sphere structures (MHSS) form a new group of advanced composite materials characterised by accurate geometry reproduction leading to stable mechanical and physical properties.
First investigations of the thermal properties of perforated hollow sphere structures are reported in [17].