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Introduction Composite materials are sensitive to changes in the environment and their mechanical properties may vary considerably with environmental conditions.
Table 1 shows the properties of jute fiber and PLA sheet.
To investigate the effects of thermal and freezing cyclic environment on the mechanical properties of green composites, the specimens were heated at 60 in the oven, and frozen at -20 in a freezer.
It is reported that amorphous cellulose in natural fiber form hydrogen bonding at 60 [6], and differences in the thermal expansion of cellulose, hemicellulose, and lignin can cause nonreversible damage and voids that can affect the physical properties of natural fiber [7].
Fig.3 SEM photograph of green composites after thermal cycle (9 cycles) Fig.4 Surface morphology of composites from the freezing after water absorption Conclusions One of the most important factors in the using of materials is the durability about extreme environment.

This review covers the nanomodification of commercial demulsifiers and the demulsification performance of magnetic and nonmagnetic nanoparticles, along with their possible mechanisms and factors that affect their dehydration efficiency.
Factors such as dosage, temperature, pH, salinity, water content, surfactant concentration; and nanoparticle wettability, and surface chemistry significantly affect the demulsification performance.
Here, we review the effects of adding nanoparticles to commercial demulsifiers, the application of magnetic and nonmagnetic nanoparticles, their possible demulsification mechanisms, and the factors affecting their demulsification performance.
This covers the nanomodification of commercial demulsifiers and the demulsification performance of magnetic and nonmagnetic nanoparticles, along with their possible mechanisms and factors that affect their dehydration efficiency.
Emulsion properties such as water content and surfactant concentration affect the emulsion stability, thus the demulsification performance.

Analyzed the dynamic of three different soil system under the action of impact response, Laid the theoretical foundation for the optimization design system. 1.Introduction Heavy machine tool is characterized by the features of big weight and big load that cause the working precision and lifespan of its large components are directly affected by the impact of ground and foundation.
Based on the assumptions above, the mechanical model of interaction system is shown in the figure below: Fig.1.
(6) 3.impose the boundary conditions 3.1 The boundary conditions of split line securing bolt There are so many factors affecting the contact surface that consideration completely depending on analytical method or test method is not comprehensive.Therefore Zhang Guangpeng [6], put these relative factors of the structure into the analysis of junction structure.
Parameters of soil basic properties The first kind of soil 4.2×107 0.35 1850 The second kind of soil 3.43×107 0.3 1800 The third type of soil 2.1×107 0.35 1750 This paper conducted a dynamic response time history analysis of the precision CNC machine tools - Box Foundation - Soil System.
Chinese Journal of Mechanical Engineering.2002,38(10):114-117

The quality of air condition is one of the major factors affecting the health of people living in urban areas.
In order to include the pollutant, species transport is switched on to define the air-carbon monoxide mixture properties.
The emission factor of CO is given by Taneeb [6] was used in this calculation.
This trend can be explained in term of turbulent intensity where the wind speed affecting the vortex strength causing the increment in the vertical mean velocity which improve the transportation of pollutants to the roof level.
Street canyon’s length may be one of the factors that influence study of street canyon in 3-D modelling.

To extend the use of secondary alloys to semisolid processing, it is necessary to thoroughly understand their properties and how they can influence a material with peculiar properties as the semisolid one.
The aim of this work is to understand if this can affect the rheological properties of the considered semisolid alloy.
Primary Al alloys are most used and usually preferred to the secondary ones since their lower content of impurities is an additional factor that ensures high mechanical properties.
Depending on the nature of the material, different experimental methods are applied to identify the mechanical properties – or the transfer function.
Parshizfard, Effect of semi-solid forming on the microstructure and mechanical properties of the iron containing Al–Si alloys, Journal of Alloys and Compounds 509(30) (2011) 7973-7978

A testing apparatus for obtaining composite dynamic properties is set up.
In particular, the loss factors are measured.
Loss factors are measured for both pure epoxy and CNT composite specimens.
Composite Fabrication The mechanical properties such as strength and stiffness of the commercially available multiple wall carbon nanotubes (MWNTs) are much superior to epoxy resin.
Several factors could affect the energy dissipation ability of the CNT composite, such as dimension of CNTs and alignment orientation of CNTs inside matrix.

The choice of biomaterial for medical applications is established on mechanical properties.
Analysis of the prosthesis microstructure clarifies the material properties.
For this reason and other design factors, structural testing continues to be mandatory before a product is placed on the market [8].
The mechanical properties and microstructures of titanium alloys are strongly dependent on their processing history and heat treatment.
It is obvious that we need to keep an optimal microstructure regarding corrosion and mechanical properties, which can be controlled through processing parameters and be standardized in the near future.

To ensure the safe operation of elevators, the guide rails, fishplates, brackets, bolts, clips have enough strength against to loads and forces which affect these elements.
In this study, shear tests are performed to examine mechanical properties of bolts and clips which are used guide rail anchor element.
All of the elevator guiding equipment has high strength and high factor of safety.
Therefore, shear tests are performed to examine mechanical properties of bolts and clips which are used as guide rail anchor element.
Conclusion Shear tests are performed to examine mechanical properties of bolts and clips which are used as guide rail anchor element.

Eventually, three samples presenting the best in all mechanical properties were chosen to investigate thermal conductivity by ASTM C177.
The thermal conductivity of the NR composite foams according to ASTM C177 was finally discussed after investigating other physical and mechanical properties.
It should be noted that the specimen’s shape, thickness and density are critical factors that interfere with the flow of heat during the measurement.
The increased amount of the reinforcing agent resulted in a significant improvement in overall mechanical properties.
The bigger particle size of the ground rice husk enhanced the mechanical properties of all NR composite foam except for the compressive strength.

Effects of Vibratory Disc Milling Time on the Physiochemical and Morphological Properties of Coal Fly Ash Nanoparticles Omolayo M.
It was established in the study that the duration of the milling affects volume, surface area, particle size, pore size distributions, as well as microstructure. 1.
It was established in the study that the durations of MDM affected volume, surface area, particle size, pore size distributions, and microstructure.
Rukuni, “Development , engineering properties and potential applications of un fi red earth bricks reinforced by coal fl y ash , lime and wood aggregates,” J.
Andrade, “Investigation of mechanical properties and carbonation of concretes with construction and demolition waste and fly ash,” Constr.