Search results

The fracture complexity could be affected by many reservoir and treatment parameters, such as fracturing fluid viscosity, modulus and possion’s ratio of the shale reservoirs, proppant properties and so on [5].
Among all the affective parameters, the stress anisotropy is the most effective and decisive parameter affecting the fracture complexity [6].
The mechanical behavior of the pore pressure cohesive element is defined in terms of a traction-separation law [17, 18].
In the following figures, the deformation magnification factor is taken as 400.
[5] Cipolla, C.L., Warpinski, N.R., Mayerhofer, M.J., Lolon, E.P., Vincent, M.C., The relationship between fracture complexity, reservoir properties, and fracture treatment design.

Tjirkallis A1,b, Kyprianou A2,b, Vessiaris G3,c 1,2,3 School of Engineering Department of Mechanical and Manufacturing Engineering, University of Cyprus.
However, in reality, structures are subjected to changing environmental and operational factors, such as temperature and moisture, which cause significant changes in its properties.
Wavelet Transform allows a very precise analysis of the regularity properties of a signal, determining the points on a signal or on its derivatives that display abrupt changes.
[3] Cornwell P., Farrar C.R., Doebling S.W., Sohn H., Environmental variability of modal properties, Experimental Techniques, 1999, 45–48
Mechanical Systems and Signal Processing 21 (2007), p. 780-794

These affected business operations and employment of the private sector in the country.
Yang [8] studied the effect of melting temperature on the mechanical properties, including density, tensile strength, and impact property, of aluminum and zinc alloys in gravity and die casting processes.
In comparison, 460°C was the optimal temperature for the zinc alloy to maximize the cast's mechanical properties.
Zhang et al., "Microstructure and Mechanical Properties of Zamak 3 Alloy Subjected to Sliding Friction Treatment," Metallurgical and Materials Transactions A, vol. 50, no. 12, pp. 5888-5895, 2019/12/01 2019, doi: 10.1007/s11661-019-05466-9
Yang, "The effect of casting temperature on the properties of squeeze cast aluminium and zinc alloys," Journal of Materials Processing Technology, vol. 140, no. 1, pp. 391-396, 2003/09/22/ 2003, doi: https://doi.org/10.1016/S0924-0136(03)00763-5

Other factors supporting this phenomenon include their relatively low price, light weight, and reasonable durability.
The main reason for this is that not all plastics have biodegradable and reactive properties.
The main factors influencing the increase in compressive strength of concrete are the physical and mechanical properties of the sand used.
This influences the mechanical properties of the aggregate such as higher stiffness, density, and crystallinity.
Pekmezci, Mechanical and physical properties and morphology of concrete containing plastic waste as aggregate, Constr Build Mater 257 (2020)

Three Dimensional Parametric Design Of The Die Channel For Plastic Extrusion Based On SolidWorks Hui Gao a, Zailiang Chenb and Xin Zhang c Department of Mechanical Engineering, Soochow University, Suzhou, Jiangsu, 215104, China agaohui3037@gmail.com, bchenzailiang@suda.edu, czxanm2003@163.com Keywords: Die Channel; Parametric Design; SolidWorks.
The design intention could be reflected more intuitively and comprehensively based on 3D CAD(Computer Aided-Design) software.Futhermore,the use of 3D solid-modeling can improve the efficiency and quality of design,shorten time-to-market and reduce product development costs[1,2] There are many excellent 3D modeling software,all of them can realize the model design.However,there is still a lot of repetitive work in the process of designing the building models.The fundamental reason is as follows:the size of these models is needed to change according to different customers,but the topology is essentially the same,which greatly affected the product development cycle.To solve such problems,one of the key technologies is parametric design technology.
Die Channel For Plastics Extrusion The geometrical property of product is greatly affected by the performance of extrusion die.
The difficulty in die design arises from the large aspect ratio of the product geometry of polymer extrusion process.In order to get uniform thickness of product,the extrusion die has to be designed to produce uniform flow rate distribution at die exit in the transverse direction.In industry there are three kinds of extrusion die commonly used,they are T-die,fish-tail die and coat-hanger die.Among them coat-hanger die is preferred ,thanks to its superior flexibility of geometry which is very important factor for the achievement of higher performance.

Introduction Epoxy resin (EP) were widely used in electric devices owing to their good dimensional stability , chemical resistance, electrical insulation and excellent mechanical properties.
Through on the rheological properties of the resin matrix can predict the viscosity of the resin system changes during the curing process.
Zou et al[3]. reported that applied the ANN to simulate the mechanical properties of the composite foam.
Sun et al[4]. has finished the work about predict the mechanical properties of wood composite with application of ANN.
In the initial stage of the reaction ,the cuing degree is low, the temperature is the main factors influence in the system viscosity.

Specifically, the glass powders based on Li2O-Al2O3-SiO2 (LAS) has been well-developed due to their great mechanical strength, thermal stability, and economical merits4-5) .
According to Frenkel equation7) , the main factors that contribute to densification by viscous flow are particle size, surface energy of particle and viscosity depending on the temperature: 3 0 ) )(8 3 1()(   rT t t g      (1) where ρ0 is initial density, ρg is glass density, γ is the surface energy of the glass particle, and η(T) is the viscosity at the temperature.
Therefore, the primary factor for the glass powder sintering is the viscosity which has severe decrement as the temperature increases.
Results and Discussion Glass properties.
For the heating rate of 10℃/min, the optimum sintering condition was 650℃ without crystal growth of β-spodumene which could affect densification, although nucleation or nano-crystal growth was occurred.

The energy based techniques rely on the attenuation property of AE signals on different equipments [2].
Network model of LS-SVR There are two free parameters viz. kernel width parameter, sigma and regularization parameter, which affect LS-SVR generalization performance.
It is a factor, which is less than 0.5.
Mechanical Systems and Signal Processing. vol 21, Feb 2007, pp.1103-1114
Journal of Mechanical Engineering Science. vol 223, Jan 2009, pp. 525-529

Modification of epoxidised soybean oil For modification of epoxidised soybean oil, ESO, a solution of ESO about 0.6 mol and ,glacial acrylic acid 2.5mol were placed in a 500ml four neck round flask equipped with mechanical stirrer, thermometer, and reflux condenser.
In this equation da/dt is the rate of mass loss, a is the fraction of material reacted, n is the reaction order, E is the Arrhenius activation energy (J/mole), T is the temperature (K), R is a constant (8.314 J/mole K) and A is the pre exponential factor (sec -1).
Ea increase with higher conversion stages, which shows thermostability is affected upon heating process.
As for pre-exponential factor, ln Z seems to vary slightly with percent conversion for both systems.
Soo Jin Park,Fan-Long Jin,Jae-Rock Lee,Thermal and Mechanical properties of tetrafunctional epoxy resin toughened with epoxidised soybean oil, Materials Sciences and engineering A 374, pp. 109-114, 2004

Influence of Axis Configuration in 5-Axis Control Machining Center on Geometric Error of Cubic Machined Surfaces Yuno Maeda1,a*, Shigehiko Sakamoto2,b , Hideharu Kato2,c , Ryuta Sato3,d and Yukitoshi Ihara4,e 1Graduate School of Engineering, Kanazawa Institute of Technology, 3-1 Yatsukaho, Hakusan, Ishikawa 924-0838, Japan 2Department of Mechanical Engineering, Kanazawa Institute of Technology, 3-1 Yatsukaho, Hakusan, Ishikawa 924-0838, Japan 3Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan 4Department of Mechanical Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan ac1052097@planet.kanazawa-it.ac.jp, bsak@neptune.kanazawa-it.ac.jp, chkato@neptune.kanazawa-it.ac.jp, dryuta.sato@mae.nagoya-u.ac.jp, eyukitoshi.ihara@oit.ac.jp Keywords: 5-Axis Machining Centers, Cubic-Machining, Structure Error, Form-Shaping-Theory, Mechanical Structure Abstract.
However, static and dynamic error factors affect the machining process in actual machining, (a) Cubic-machinig (c) Top surface on the cube (e) Side surfece on the cube (b) Cubic-machining (d) Top surface sections (f) Side surfece sections on the 5-axis MC Fig. 1 Surfaces on the machined cube and the nine surfaces created as the machined surface will have height differences as machining errors.
Rotating the rotational axis B-axis to change the tool posture changes the orientation of each error factor relative to the workpiece coordinate system.
(3) Tool posture has only a small effect on the machined surface properties, and it is possible to measure the height difference between each machined surface.