Search results

Water shortage is a major global issue affecting the construction industry.
The stress on water resources stems from several factors, including climate change, urban development, and the growing population [2].
Hajiannia, Physical and mechanical properties of sand stabilized by cement and natural zeolite,  Europ.
G. de Sousa Galdino, The effect of content and fineness of natural pozzolana on the rheological, mechanical, and durability properties of self-compacting mortar, J.
Kivevele, Effect of natural pozzolana on physical and mechanical properties of concrete, Adv.

It improves the surface and internal structure, enhances its mechanical and physical properties, and enables rapid and precise manufacturing of large-area, complex concave-convex or functionalized surface textures.
This is because mask-assisted electrochemical machining is influenced by multiple factors that affect the machining quality, including voltage, frequency, duty cycle, electrolyte, spacing, and others.
This is because if the height of the micro-columns is too low, it would not be able to generate sufficient depth of surface texture through cold pressing, thus affecting its oil storage functionality.
The orthogonal experimental factors and levels are shown in Table 3.
Table 3 Factors and levels.

The section form of smoke outlet is one of the main factors affecting smoke extraction.
Smoke, heat, lack of oxygen generated by fire are the main reasons for casualties and property losses in case of fires in tunnels [1-4].
In order to further understand the fire smoke feature affected by different sections of smoke outlet in road tunnel and bring forward some reference on section selection of smoke outlet, this paper carried out CFD simulation analysis on fire feature of a certain large scale cross-section road tunnel with different sections of smoke outlet.
The contour pictures demonstrated distribution properties of smoke, temperature, visibility, carbon monoxide and carbon dioxide concentration when the simulation time was at 900s.
References [1] Zhong Wei: Experimental and simulation study on the influence of smoke vent arrangement on smoke control effect in subway station, Engineering Mechanics (in Chinese), Vol. 27, No. 3, pp. 163-168, (2010) [2] Ji Jie: Influence of relative location of smoke exhaust opening to fire source on mechanical smoke exhaust efficiency in a long channel, Engineering Mechanics (in Chinese), Vol. 26, No. 5, pp. 234-238, (2009) [3] Xu Xiaolei, He Jiapeng and Zhou Ru: Smoke exhaust effect by different arrangement methods of smoke vent in high rise building fires, Journal of Safety Science and Technology (in Chinese), Vol. 5, No. 5, pp. 18-22, (2009) [4] Jing Chengyin, He Jiapeng and Zhou Ru: Effect Simulation of Smoke exhausting Way and Smoke Exhausting Position on Smoke Diffusion in Walkway under Natural Ventilation, China Safety Science Journal (in Chinese), Vol. 17, No. 11, pp. 48-53, (2007)

Because of its good properties in high temperature resistance, resistance to water, oxygen barrier, low electrostatic effect, and so on, in especial low cost and easy access, stainless steel will become the most of the substrate material in the application of the flexible displays [4].
The chemical mechanical polishing (CMP) is a new technology which has developed in the past thirty years and can realize the super smooth surface without damage by combination of chemical action and mechanical action.
Slurry is an important part in chemical mechanical polishing.
Zhang, et al, Influencing factors on etching rates of iron nickel alloy foils in ferric chloride solution, Corr & Prot. 28 (2007) 238-241
Jiang, et al, Influencing factors on etching rates of stainless steel, Plat & Fini. 32 (2010) 34-36

Besides that, mix design and the way of production like mixing, transporting and pouring concrete is also the factors to get a better quality of concrete.
On the other hand, coconut fibre has excellent physical and mechanical properties that can be utilized more effectively in the development of composite materials [4].
Fig 7 Drying Shrinkage Conclusion and Recommendation The overall objective of the work was to investigate the feasibility of mechanical properties of blast furnace slag and rice husk ash with coconut shell as partial replacement of aggregates.
Sarireh, “The Use of Fine Blast Furnace Slag in Improvement of Properties of Concrete,” Open J.
C, “Properties of Concrete with Coconut Shells as Aggregate Replacement,” Int.

The Drude-Sommerfeld equation describes the optical properties of metallic and plasmonic structures by relating the complex dielectric functions to electronic properties.
Optical properties and photothermal deicing performance.
Optical properties and deicing performance of transparent photothermal coating containing CuS nanorods.
FDTD simulation was utilized to demonstrate the impact of shape factor on optical properties of CuS nanoparticles.
In terms of electromagnetic optics, the size factor of CuS nanorods influences the near-field effect, consequently affecting the light absorption capacity of transparent photothermal coatings, which could be investigated in future work.

However, other important factors, such as yield stress, cannot be determined by the bending test due to the specimen’s thickness limitation.
Thus, measuring the properties of structures sized at the micron-scale can be answered most convincingly only through suitable experiment.
The theoretical stress concentration factors in the notched specimens are evaluated by the finite element analysis code ANSYS .
Results 3.1 Mechanical properties Fig. 2(a) shows example of the nominal stress vs strain curves of the notched and notch-free specimens in the tensile test along the RD at room temperature.
Peterson’s stress concentration factors A Wiley Interscience Publication, 38.

Water inrush will not happen until the three factors exist at the same time and become a special condition.
It did not consider the impact of mining and other factors.
Moreover different rocks have wholly different mechanical properties and ability to resist water pressure.
Making a comprehensive survey on the revising process of water inrush coefficient calculation, it was not hard to see that the study focused mainly on the structure and mechanical properties of floor aquicludes.
By the analysis of the experimental data, it can be seen that low permeability rock affecting the water head loss in the process of confined water flowing upward mainly exists in the strata properties, the mechanical properties of rocks (tensile strength) and its permeability and so on.

Usually, advanced mechanical properties can be traditionally achieved by alloying process, where some elements or chemical compounds are added to affect the chemical composition of the formed material.
Al A356 alloy has an outstanding castability, and mechanical and physical properties.
Usually A356 alloy mechanical properties enhanced by the alloying method [2–7] using master alloys, by heat treatment, or by applying ultrasound that affects the solidification process [8–10].
Mechanical properties of modified and non-modified A356 alloy by WC nanoparticles.
As the result, the alloys’ mechanical properties are improved.

Introducing the machining-ability of the surface of hydrogenated cylindrical shell’s blank, and the analysis showed that one of the main macroscopic factors which caused the tool to be broken early was forging defect.
The defect causes the cutting depth to make dynamic changes, so that the tool will be affected by the dynamic mechanical load and thermal load (refer with: Fig. 3).
The Calculation of Tools’ Dynamic Strength The forging defects on the surface of large-sized forging can severely affect the service life of cutting tools, especially the exist of both forging shovel and forging crack, they will cause the cutting force to fluctuate greatly, and the rapid rise or sudden drop of the cutting force will lead into enormous mechanical impact.
Figure 5-b is to analyze the dynamic mechanical impact that the tool withstands, seen from which dynamic mechanical impact on cutting area is decentralized.
Therefore, the foregoing model can be used for determining the tool life of various materials, and at the same time, both the creep resistance and strength property should be taken into account when selecting the tool materials.