Search results

Nanocomposites are the materials for the future, which have improved mechanical properties.
This interest in CNTs is due to their large aspect ratio (>1000), and their mechanical, electronic and conductive properties.
Reproduced from [119]. 6.4 Fire retardancy Fire hazards result primarily from the combination of a number of different factors.
Both the temperature-sensitive polymerclay interaction and the shear field are critical factors controlling the disorientation process of oriented clay layers.
Landel in : Mechanical properties of polymers and Composites, New York: Marcel Dekker(1994) [6] M .

This smart material have many kind of polycrystalline combinations, but the Nickel-Titanium (NiTi)is considered to have the most beneficial properties to be used as an actuator [2] among other actuators such as electric motor, electromagnet, pneumatic cylinders or hydraulic.
Even though this is acceptable if the weight did not exceed the maximum capacity, it will affect the performance of the actuator.
This situation is also related to time-joint spasticity issues as patient’s finger will become harder to move by time which can be interpreted as a weight factor for the actuator.
However, using current-supplied heating for the SMA wire will affect the energy efficiency especially when battery is intended to be used as a portable power source solution.
The actuation system and mechanical parts works well to provide flexion and extension for the exoskeleton prototype.

The fiber/matrix interfacial domain is a decisive constituent of fiber reinforced ceramic matrix composites (CMCs), and a high-performance composite material must be provided with proper interphase which has appropriate thermodynamic and mechanical properties.
The initial microcracks in SiC matrix make the interphase behavior and overall mechanical response of woven composites more complex.
The material properties of each component were given as Tab.1, and the interphase and SiC matrix were isotropic, and C fiber was anisotropic.
The cohesive element was used to simulate the mechanical properties of the interphase, and the parameters of the CZM were adopted the data stated above.
The interphase crack can extended to the bottom and top of the FEM model with weak properties of interphase.

Introduction Coal pillar width is an important parameter in the design of work-face mining, because a reasonable width can directly determine the mining rate of coal and affect the utility efficiency and maintenance cost of roadways.
Because of the sound condition of occurrence, large mechanical equipment is used in the work-face recovery with a height of about 5 m.
The mining height is 4.8m and footage driving cycle is 0.9m; the one pass mining of large cutting height is adopted on the work-face and fully caving coal mining is used to control the roof. 1-5101work-face；2-Goaf；3-Coal pillar ;4-5101work-face return airway；5-5103 work-face roadway；6-Contact roadway Fig. 1 The roadway layout of work-face Theoretical Calculation To calculate the width of coal pillar is quite a complicated problem, because it can be affected for many factors such as the mining depth, coal-seam thickness, height of roadway and mechanical properties of rock and coal seam.
According to the distribution of bearing pressure along the tilting coal seam, the area which can be greatly affected by the pressure is not at the edge of the coal, but in the area distant from the edge.
It can be seen that when the width is 25m, the stress and stress concentration factor is the minimum; when the width is 20m, they are the second minimum; when the width is 35m, the deformation is the smallest.

In this case of polylactic acid made assembly tool is made manufacturing optimization with polylactic acid material properties in mind.
Authors Xiao L. et al. [2] focused on the properties of PLA material, biodegradability and industrial application.
It even reaches the same properties (flexibility, hardness, transparency, flexibility).
Reason for this setting is time management and fact that there is no need for fine layers in this case. 3D prints from FFF machines have different mechanical properties in Z axis and XY axes.
Hexagonal pattern was chosen for its strength properties.

Mechanical properties and construction of the forming mechanism of these types were verified under the static load.
Design and construction phase for cable domes is more, complex conditions, multiple factors.
Errors lead to the final molding of the prestressed values ​​and ideals of deviation, the mechanical properties of the structure have been changed to some extent.
Wind tunnel test model needs scale, whose environmental factors to be considered was not comprehensive enough.
Air temperature model study, structure and component temperature study, high temperature mechanical properties of the overall structure study, the whole stability study and fire resistance study for cable dome structure are necessary.

The properties of the P-type silicon wafer and Pyrex glass are given in Table 2.
Table 2: Mechanical and Thermal Properties of Work Material Material Hardness [GPa] Density [g*cm3] Thermal conductivity [W / (m × K) ] Melting temperature [oC] P-type silicon 12 2.33 148 1414 Pyrex glass 418 2.23 1.1 821 The experiments have been carried out according to the 3-level Box-Behnken design based on response surface methodology which provides 17 runs of experiment.
Surface roughness affects corrosion, fatigue life, friction and wear and tear of parts.
High temperature is main factor for the modified high CO2 laser absorption of silicon wafer.
Rizman: Numerical and Experimental Analysis of Activated Carbon Filter on the Mechanical Properties of Wood Composites.

Therefore, road sector companies use various surfactant species that improve the bitumen properties.
The presence of unique zeolite properties [4] activated the process of its active use and studying.
Therefore, the milling time of the nanomodified agent was taken as one of the variable factors.
This allows getting a system with a high degree of asphaltic-binder base structuring (bitumen + mineral filler) and positively affects the properties of road composite materials.
Kindeev, The destruction of polymer modified binder and prescription factors her determining, International Journal of Pharmacy and Technology. 8 (3) (2016) 18200-18211

However, the appearance of stress in interconnects has a large effect on manufacturing reliability and device properties.
Paik et al [5] observed an increasing stress with the increase of line dimensions in damascene Cu, which was in contrary to etched Al interconnects [6], and attributed this phenomenon to the larger grain size induced high growth stress after chemical-mechanical polishing process.
As a matter of fact, many factors can affect stress evaluation in thin film and interconnects, among which the size effect is claimed one of the most important phenomenon.
The thermo-mechanical properties of the tested materials used for calculation are summarized in Table 2 [5, 14].
Material properties used in this study Fig. 5.

Luis1,b 1 Mechanical, Energetics and Materials Engineering Dept. - Manufacturing Engineering Section Public University of Navarre, Campus de Arrosadia s/n, 31006.
This process is a new technique used to obtain an improvement in the mechanical properties, such as higher yield stress, higher ultimate tension, more ductility, higher elongation, etc, of the processed materials.
These improvements on the mechanical properties are based in the metallographic grain refinement, as a consequence of the plastic strain accumulation inside the material [2].
This study is interesting in order to know the accumulated strain, because it would be one of the principal factors that affects in the posterior heat treatment.
Puertas, Mechanical behaviour of an Al-Mg alloy processed by ECAE, The 21st international manufacturing conference IMC 21,2004, Vol. 1, p.167-174, Ed.