Search results

The experimental data show CGFB slurry rheological characteristic is noticeable influenced by the slurry solid concentration and the proportion of the fly ash, which affects the value of yield stress and viscosity.
Within the slurry, the coal gangue particles are subject to various mechanical forces including the gravity, buoyance and cohesion, which comprehensively conducted the coal gangue full-suspension.
Yield stress and viscosity of high solid concentration slurry depends upon the various factors such as particle size distribution (PSD), chemical composition and slurry concentration [6-8].
Fig. 2 provides the rheological properties of CGFB on 76.05%, 78.05% and 80.05% solid concentration.

However, Tresca’s yield condition indicates that the normal stress on slip planes does not affect shear strength.
Their mechanical properties are different from position to position.
In geological problems, high temperature and high pressure deep in the earth’s crust will affect strength and deformability of rocks.
Meanwhile, some other thermal properties of soils and rocks, such as thermal expansion, will also cause stress alteration.
The bearing capacity of the foundations, the safety factor of the slopes, and many other solutions for the Ankang project are determined.

Prediction of Forming Limit Diagram for AA5754 using Artificial Neural Network Modelling Mohamed Mohamed1,3,a*, Sherif Elatriby2,3,b, Zhusheng Shi4,c, and Jianguo Lin4,d 1Advanced Forming Research Centre (AFRC), Strathclyde University, Glashow, UK 2School of Mechanical and Systems Engineering Department, Newcastle University, UK 3Mechanical Engineering Department, Faculty of Engineering, Helwan University, Egypt 4Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK aMohamed.Mohamed@strath.ac.uk, belatribysherif@h-eng.helwan.edu.eg, cZhusheng.Shi@imperial.ac.uk, dJianguo.Lin@imperial.ac.uk Keywords: Aluminium Alloys, Warm Forming, Forming Limit Diagram (FLD), Artificial Neural Network (ANN) Abstract.
Several factors affect the FLC including sheet thickness, temperature, strain rate and grain size and strain hardening exponent.
Nonlinear deviation before and after the critical point The estimated non-linearity factors are illustrated in Fig. 6 at the mid-point between point 1 and 3 to estimate the coordinates of point 2, and at the mid-way between 3 and 5 to estimate the coordinates of point 4.
Pokora, Influence of the plastic properties of a material on the forming limit diagram for sheet metal in tension, International Journal Mechanical Science, 15 (1973) 789–805

Several methods are employed to improve indoor thermal environment, including installing optimum shading devices, lowering glazed areas, using light colors for external surfaces, and adopting appropriate thermal properties of external walls and roofs.
These features affect the amount of heat gain/loss through windows by solar radiation or conduction heat transfer.
Each module performs specific calculations such as “Apachesim” for thermal simulation, “Radiance” for lighting simulation, “Mechanical” for mechanical simulation, and “SunCast” for solar shading analysis.
Investigation Factors.
The author also would like to thank USM and IVORY Properties Group for all the assistance and cooperation given.

The physical and mechanical indexes of rock are listed in table 1.
The joints use Mohr-Coulomb slide model, the property parameters are seen in table3.
Table 3 Property parameters of the fractures Normal stiffness [GPa/m] Shear stiffness [GPa/m] Initial fracture width[mm] Residual fracture width[mm] Cohesion [MPa] Internal fraction angle[0] Joints 30 10 1 0.5 1.5 45 Fault 12 8.2 1.5 0.7 0.6 23 The number of all elements in calculation region reaches about 59000.
With the water pressure in water curtain tunnels increasing, water pressures in fractured rocks increase also, but water pressure in some observation points increases greatly and in other points of observation increases little, depending on the location of the observation points, the fracture width in which the observation points are located and other factors.
Conclusions While the excavation of caverns carried out in stages, the groundwater level is affected greatly as the top parts of the caves are excavated.

However, metal honeycomb panel requires quenching processing, which may cause uneven distribution of the sheet stress and severe bulging, and finally affect the forming quality of components.
Temperature Field Simulation Quenching is an extremely intense short process, during which the temperature and mechanical properties of the sheet will have a great change, and it will be more obvious because of the thickness of the aluminum alloy thin sheet.
According to the first characteristic, the temperature field simulation needs to consider the following factors: (1) We cannot assume that the sheet surface immerses in the quenching liquid at the same time.
Chinese joumal of mechanical engineering, 1986 (in Chinese) [9] Lin Shi.

In this paper, Ti-6Al-4V titanium alloy was used as an example to study the SPF technology of bellows made of titanium alloy for its excellent resistnace to corrosion, good fatigue resistance, and good superplasticity in the commercial as-received state [4,5].The material properties of Ti-6Al-4V alloy are appropriate for making bellows; its service temperature, cycle stress and anticorrosion are well-known.
But it is impossible to make bellows using conventional hydroforming and mechanical forming methods due to bad plasticity at room temperature.
In this section various factors influencing thickness distribution of bellows are simulated using a 3D rigid-visco plasticity shell finite element developed by the authors. 4.1.
Table 2 Influence of the length of tubular blank on wall thickness of bellows in various stages length of tube/mm percentage/% minimum thickness of crest in various stage/mm bulging clamping calibrating 97 97.3 1.241 1.06 1.051 94 94.3 1.22 1.04 1.03 91 91.3 1.20 1.02 1.01 88 88.3 1.18 1.001 0.991 The length of the tubular blank obviously affects the thickness distribution of the bellows.
American Society of Mechanical Engineers. 1984. 4.

Methyl acrylate, hydroxylamine hydrochloride solution and aqueous sodium hydroxide solution (molar ratio = 1:1.15:4.5) were added in turn to a 500 mL three-necked round bottomed flask equipped with a reflux condenser, mechanical stirrer and thermometer.
The resulting solution is directly used for preparing St-g-AM-AHA. 1.3 Synthesis of St-g-AM-AHA [8,9] Liquid paraffin and appropriate amount of emulsifier were added to four-necked round bottomed flask equipped with a mechanical stirrer and airway.
Preparation of PSDC chelating resin and absorption properties for heavy metal irons in wastewater[J].
Analysis of Some Factors which Affect the Quality of hydroxamic acid[J].

An et al. [27] using MD simulations to study the thermo-mechanical properties of acrylamide-based hydrogels cross-linked with N, N'-methylenebisacrylamide hydrogels, it is revealed that water content is the main factor to control the elastic properties of the hydrogels.
Hydrogels with superior mechanical properties from the synergistic effect in hydrophobic-hydrophilic copolymers.
Designing the slide-ring polymer network with both good mechanical and damping properties via molecular dynamics simulation.
Ziaei-Rad, A molecular dynamics investigation on mechanical properties of cross-linked polymer networks.
Rahbar, Multi-scale mechanical and transport properties of a hydrogel.

Affected by Ordovician confined aquifer of bottom board, during the working face extraction, it may occur complex dynamic water inrush.
In order to be able to accurately monitor roof and floor mining-induced fracture, considering running monitoring system, power supply and signal synchronization and other factors, and contraposed the actual monitoring area, alternate arrange measuring points and install detector in the auxiliary transport lane 19106 mining face layout area.
According to the state of the requirements of the relevant software system Settings, the rock which has similar physical properties as a single property of rock was combined within the scope of calculation model reference to drilling data.
Assumed that the initial stress of rock mass was caused by the gravity of rock, the model material properties were simplified to eight kinds of rock structure, and the rock joints were simplified to two groups of joints in horizontal direction and vertical direction.
The rock material property parameters are shown in table 1.