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The alkaline treatment solution generally reacts with the fibers' hydroxyl groups to enhance its hydrophilic properties, based on the fact that natural-derived fibers hydrophilic property reduces the mechanical properties and the bonding strength between fibers and the surrounding matrices, leading to better fiber-matrix bonding [9, 10].
The morphology structure of the cellulose fiber is one of the important factors that influence the physical and mechanical properties of the fiber when used as a reinforcing material for polymer composites.
Saifulazry, “Effect of fibre length and sea water treatment on mechanical properties of sugar palm fibre reinforced unsaturated polyester composites,” Int.
Ishak, “Influence of Treatments on the Mechanical and Thermal Properties of Sugar Palm Fibre Reinforced Phenolic Composites,” Bioresources, vol. 12, no. 1, pp. 1447–1462, 2017
Ishak, “Mechanical properties and fabrication of small boat using woven glass/sugar palm fibres reinforced unsaturated polyester hybrid composite,” IOP Conf.

It’s noted that the modulus and stiffness of RAC, even the bond of RAC and rebar are key factors in the future study.
The reason for drop of strength is analyzed from material properties and mechanical change of strength of fire-damaged specimens, and the theoretical prediction is put forward.
In the first phase, the relative deformations grew steadily as the recession of the mechanical properties of materials.
Unlike the experiments under the room temperature, the mechanical properties under room temperature didn’t play the mainly role in the fire.
Then the RAC components presented better performances as it owns better thermal properties. 6.

In the second half of this paper the comparison of the productivity differences between TIG and ATIG welding; mechanical properties, microstructure and corrosion resistance of welded joints will continue.
• What are the mechanical properties of the joints of TIG and ATIG welding?
The first aim was to clarify the effects of the outer determinant factors.
Comparison of mechanical properties Several tensile and bend tests were made on welded joints of both TIG and ATIG welding, but any difference were found between the results.
This result represents that ATIG welding's mechanical properties are just perfects like TIG welding's.

There are some factors that affect multiaxial LCF damage of single crystal superalloy.
Therefore, it is necessary to analyze and study these factors for determining an appropriate fatigue damage parameter to predict the fatigue life.
Influence Factors on Multiaxial Fatigue of Single Crystal Nickel-based Superalloy Influence Factors of Fatigue and Its Level Design.
(2) As a cubic materials, the single crystal nickel-based superalloy has the same mechanical properties in the [001], [010] and [100] crystallographic directions, which are the principal axes of the material coordinate system.
Qi: Mechanical Strength, Vol. 23(2001) No.3, pp.316-318.

Laser Welding Because of the big difference in physical properties between matrix and reinforced phase, defects such as porosity, slag inclusion and gas pore are apt to emerge in the weld subjected to the fusion welding.
It was pointed out that an important factor affecting strength of the joint was the reaction between the matrix and the reinforced phase.
At the same time, reaction products Al4C3 and Si, due to the properties of being brittle, further weakened the strength of the weld.
Important factor affecting the joint strength is the interface reaction between whisker SiC and matrix Al in the molten pool.
The brittle reaction products damage the initial interface between reinforced phase and matrix, consequently decreasing mechanical properties of the weld

The level of various factors usually bases on the experience.
Hu, The effect of hybrid fibers on the mechanical properties and impermeability of high-performance concrete, Concrete, 11 (2003) 33-35
Wang, Mechanical properties and impermeability of hybrid fiber reinforced concrete, Journal of Building Materials, 1 (2008) 89-93
Jie, Keru Wu, Mechanical properties of hybrid fiber-reinforced concrete at low fiber volume fraction, Cement and Concrete Research, 33 (2003) 27-30
Gong, The effect of hybrid fiber-reinforced concrete on mechanical properties and crack resistances, Concrete and Cement Products, 2 (2009) 48-51

Mainly, wooden sleepers are exposed to wood-destroying fungi, under the influence of which mechanical parameters decrease and the physical and chemical properties of wooden sleepers change.
Sleepers operated in the open air are under constant influence of climatic factors of destruction.
Antiseptics are used to protect wooden sleepers from the effects of damaging factors.
The presented results were obtained within the framework of the state task "Initiative scientific projects" on the theme No. 13.5443.2017 / BC "Modification of the physical and chemical properties of wood biomass affecting the performance characteristics of the materials being created".
Sadrtdinov, Thermal Insulation Properties of Wood Polymeric Sand Composite, Solid State Phenomena, 284 (2018) 986-992

Performance of Steel Slag and influence of the steel slag aggregate on physical and mechanical properties and durability of porous cement concrete were studied in this paper.
Therefore, porous cement concrete made by steel slag aggregate is probably of higher mechanical properties.
Physical and mechanical properties of porous cement concrete prepared by steel slag aggregate Table 4 was presented physical and mechanical properties of porous cement concrete prepared by steel slag aggregate.
In addition, mechanical properties of cement concrete were obvious different with different kinds of aggregates.
And interface bonding strength was affected by the strength of cement paste and thickness of interface.

Therefore, mathematical equations, that represents the respiratory cycle; mechanical components, giving dimension and movement to the simulator; and the electronic components, allowing data acquisition and system control are some factors that must be known and synchronized.
Therefore, the HRS simulation becomes possible when factors like mathematical equations, which represents the respiratory cycle; mechanical components, giving dimension and movement to the simulator; and the electronic components, allowing data acquisition and system control, are managed.
The lung volume is one of the most important variables and affects gas exchange.
Lung volume is not a strict value, and varies according to the elastic properties of the lung and of the chest wall muscles [5].
Volume, alveolar pressure and flow during respiratory cycle (adapted from [5]) The elastic properties of the lung are measured by defining lung compliance (C).

The useful wrinkles are expected to improve the forming property.
Actually wrinkles are hard to calculate through the energy method directly, which was affected by some factors.
Because the wrinkles are affected by parts geometric shape, wall thickness, material mechanical properties, etc.
When mechanical condition isn’t satisfied, the bursting wrinkles will happen.
Wang et al [10] studied the geometrical parameter which affected on wrinkles by the means of neural network method.