Search results

Magnesium alloys are among the best light-weight structural material with a relatively high strength-to-weight ratio end excellent technological properties.
Magnesium alloys nowadays have drawn special attentions and interests of researchers working in automotive and aircraft industry [14-16] as they are among the best light-weight structural material with a relatively high strength-to-weight ratio end excellent technological properties.
When coupled with large and variable grain sizes, the HCP structure has in the past lead to less than optimum mechanical properties.
Conversely, increasing temperature has an adverse affect on mechanical properties [19].
Many magnesium alloys have been developed and continue to be researched and developed in an effort to improve mechanical properties.

Lignin from bioethanol waste is thought to improve the physical and mechanical properties of mortar as well as lignosulfonate from black liquor. mechanical properties of mortar as well as lignosulfonate from black liquor [8].
The main objective of this study was to determine the effect of lignin as a biopolymer admixture on the characteristics of mortar both physical properties and mechanical properties.
It's important to consider ecological factors when choosing materials.
The shape and size of the test specimens affect the compressive strength of mortar, besides that, many factors can affect the compressive strength of mortar including cement water factor, mortar age, sand gradation, and temperature.
Conclusion From the results of the research that has been done, lignin as an admixture to the mortar mixture makes changes to the characteristics of mortar, both physical properties and mechanical properties.

Unlike other forecasting models, the model input variables of wind power prediction model are not only historical wind power output but also major factors effecting wind power in order to improve prediction accuracy.
Major Factors Effecting Wind Power Wind farm output power comes from wind power captured by wind turbines.
Therefore, the major factors affecting wind farm electric output are simplified to air speed and air temperature.
As mentioned in previous section, the major factors affecting wind turbine output are air speed and air temperature, so they can be used as model input, and can be obtained from a Supervisory Control and Data Acquisition (SCADA) system installed at a wind farm.
Further studies will be carried out to improve this dynamic model, such as considering effects of other factors which are wind direction, humidity, etc.

Material properties of resin materials diluted with BCA (Butyl Carbitol Acetate) were shown in Table 1.
Material properties of phenoxy resin as a function of content of BCA.
Material Thinner [Vol.%] Viscosity [Pa⋅s] Specific gravity Surface Tension at 25 °C [Pa⋅s] 0 27.57 1.04 0.0236 5 16.50 1.03 0.0231 10 11.94 1.02 0.0240 20 7.08 1.01 0.0227 Phenoxy resin 25 4.55 1.01 0.0231 Since the surface state of the pad affects the wetting property of liquid resin on the pad, we performed surface treatment, followed by polishing and degreasing.
Though the liquid volume and viscosity level of the liquid resin critically affect the aligning time and motion, the effect of the viscosity level on the alignment accuracy was not observed if the viscosity level is once low enough to move the chip.
For the alignment processes using the materials with low surface tension, however, the viscosity may be one of the main factors for self-alignment capability with surface tension.

In project application, its property under load and the design method and durability precautions.
The technology shows better comprehensive economic benefits, by the national ministry of construction in one of the important application of scientific and technological achievements. 1 Prestressed concrete structure design features 1.1 The bending ultimate strength calculation 1.1.1 Stress calculation of unbonded prestressed reinforcement Unbonded prestressed concrete structure and the corresponding bonded structure are different, the mechanical behavior in unbonded prestressed structures, the unbonded prestressed tendon strain growth, is equal to the length along the prestressed concrete around the average of the strain change, the growth of its stress is relatively slow, generally reach its ultimate strength, in determining the bending strength of unbonded prestressed structures.
The factors that affect the ultimate stress mainly includes: the effective prestress of unbonded tendons, the size of the unbonded prestressed steel and ordinary steel reinforcement ratio, flexural member of cross ratio, loading mode, support conditions, unbonded tendons and friction between the pipeline and prestress concrete is the form and material properties, degree of constrained.
Overall, compared with cohesive force reinforced concrete structure, the medium of unbonded prestressed concrete structure is poorer, local failure will affect the whole, form is more intense, therefore, should be paid sufficient attention.

Eighteen experiments (L18) with five factors (cutting speed, feed rate, depth of cut, volume of particle reinforcement, and type of coated insert) were performed based on Taguchi designs of the experiment method.
The solidified AlSi/AlN metal matrix composite passed through a heat treatment process to increase the mechanical properties; strength and hardness.
Also, the mean values of the S/N ratio of the five control factors at each level are shown in Figures 2 and 3.
From the experiment, it has been observed that the percentage of reinforcement and type of coating are the most significant factors contributing to the minimum surface roughness.
Based on ANOVA, it has been shown that the percentage of reinforcement, type of coating, and depth of cut are the most significant factors contributing to the minimum surface roughness, while the percentage of reinforcement, cutting speed and feed rate are the main significant factors contributing to the low cutting force. 3.

Realize the property of cutting force.
Determine the input and output factors & Hardware setup.
The output factors in the training data set were the tool good or broken.
Input and output factors of TNITBM system Figure 3.
The value of output factors was used to judge the tool conditions.

He2,d 1Department of Chemical and Materials Engineering, the University of Auckland, Private Bag 92019, Auckland 1142, New Zealand 2State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China aemail: hbi001@aucklanduni.ac.nz, bemail: cyu060@aucklanduni.ac.nz, cemail: p.cao@auckland.ac.nz, demail: yuehui@mail.csu.edu.cn Keywords: Powder sintering; Mechanical properties; Porous alloy; Ti-6Al-4V Abstract.
Introduction Titanium and its alloys offer very attractive mechanical properties and exceptionally corrosion resistance, and hence have found a wide range of applications such as in aerospace, marine, medical and chemical processing industries [1, 2].
The characteristics of the porous microstructures, mechanical properties and corrosion evaluation are investigated.
Although the porosity is the main factor for the attendant mechanical properties, the chemical inhomogeneity may play some roles in this aspect.
Qian, Sintering of Ti-10V-2Fe-3Al and mechanical properties, Materials Science and Engineering A, 528 (2011) 6719-6726.

He concluded that injection speed, core cylinder temperature and mould temperature are factors that can influence the mechanical strength of sandwich injection moulding.
He also said that melt temperature and injection pressure are the secondary factors, but higher melt temperature and injection pressure are also necessary in moulding process of ultra-thin wall plastic parts.
Aluminium is a useful metal that provide many usage with valuable properties.
As this metal has recycling properties, it is enough to meet all our daily needs.
This effect is extremely important in fracture mechanics and it gives aluminium so many of its important properties [11].

Effect of Nozzle Layout Parameters on the Controlled Cooling of Flat Steel Shaojun Zhang, Dongmei Zhu and Guoyong Liu School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083,China sjzhang@me.ustb.edu.cn Keywords: Flat steel, Controlled cooling, Numerical simulation, Nozzle Abstract.
Relatively the number of nozzle rows affects cooling rate of flat steel greatly.
Different layout parameters of the controlled cooling nozzle will be used by considering different factors.
And the state organization of steel, ratio of the every phase and precipitation of carbonitride are controlled by controlling the cooling rate of the phase transition, so as to enhance and improve the mechanical properties and performance of steel.
The layout nozzle in every water cooling area can affect cooling rate of flat steel directly.