scholarly journals Laser Cutting of High Density Poly Ethylene (Hdpe) Pipes Pe100 using Co2 Gas Laser

2019 ◽  
Vol 9 (1) ◽  
pp. 6193-6199 ◽  
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Oil And Gas ◽  
Low Cost ◽  
High Density ◽  
Frequent Use ◽  
Metal Pipes ◽  
Poly Ethylene ◽  
And Performance

High Density Poly Ethylene (HDPE) is one of the best materials for use in different environmental conditions. This is due to the mechanical, chemical and electrical specifications of this type, in terms of thermal insulation, lightweight, low cost, and most importantly the time factor. The molecular structure of the High Density Poly Ethylene material has made it the ideal choice for use in the pipe industry, and the transportation of various liquids, compared with the metal pipes and especially in the transportation of water, oil, and gas. And because of the frequent use, especially in the workplace. The need to use the cutting for these pipes has become necessary for the purpose of establishing networks for the transfer of fluids. In this research, the construction of holes in the pipes and measurements and angles of different for the purpose of taking advantage of these openings in the construction of networks. The laser was used as one of the modern cutting methods for the purpose of studying the efficiency and performance of CO2 laser cutting on High Density Poly Ethylene, especially on pipes, PN 16 PE 100, 110 mm diameter, and tested under a CO2 laser machine, by using a three different kinds of gases, such as the air and the nitrogen N2 , to estimate the changing and evaluate the quality of cutting with striation and kerf width of the High Density Poly Ethylene.

scholarly journals Manufacturing and development of a bolted GFRP flange joint for oil and gas applications

2021 ◽  
pp. 095440542198951
Author(s):  
Muhsin Aljuboury ◽  
Md Jahir Rizvi ◽  
Stephen Grove ◽  
Richard Cullen
Keyword(s):  
Pressure Vessel ◽  
Oil And Gas ◽  
Polyester Resin ◽  
High Strength ◽  
Adhesively Bonded ◽  
Acceptable Quality ◽  
Composite Pipe ◽  
And Performance ◽  
Composite Pipes

The goal of this experimental study is to manufacture a bolted GFRP flange connection for composite pipes with high strength and performance. A mould was designed and manufactured, which ensures the quality of the composite materials and controls its surface grade. Based on the ASME Boiler and Pressure Vessel Code, Section X, this GFRP flange was fabricated using biaxial glass fibre braid and polyester resin in a vacuum infusion process. In addition, many experiments were carried out using another mould made of glass to solve process-related issues. Moreover, an investigation was conducted to compare the drilling of the GFRP flange using two types of tools; an Erbauer diamond tile drill bit and a Brad & Spur K10 drill. Six GFRP flanges were manufactured to reach the final product with acceptable quality and performance. The flange was adhesively bonded to a composite pipe after chamfering the end of the pipe. Another type of commercially-available composite flange was used to close the other end of the pipe. Finally, blind flanges were used to close both ends, making the pressure vessel that will be tested under the range of the bolt load and internal pressure.

scholarly journals An Improved Handover Algorithm for LTE-A Femtocell Network

2020 ◽  
pp. 558-565
Author(s):  
Olusegun O. Omitola ◽  
◽  
Viranjay M. Srivastava
Keyword(s):  
Quality Of Service ◽  
Urban Area ◽  
Cellular Networks ◽  
Low Cost ◽  
Mobile Cellular ◽  
Femtocell Network ◽  
Mobile Cellular Networks ◽  
And Performance ◽  
Handover Algorithm

Femtocells have been regarded as low-power and low cost devices for enhancing the capacity and performance of mobile cellular networks. Apart from forming a two-tier network with the macrocell to offload traffic from the macrocell, femtocells can be deployed in an urban area to achieve more data rate with better Quality of Service (QoS). However, this is at the expense of increased frequency of the handover of the UEs from one femtocell to another femtocell. Selecting a particular femtocell for handover is a serious challenge in a femtocell/macrocell deployment environment. Similarly, managing the resulting handovers can be extremely difficult. Thus, this study presents an algorithm to improve handover in LTE-A femtocell network. The complexity of the algorithm was determined and the performance by comparing it with existing algorithm in terms of number of handovers and the ratio of target femtocells. The results have shown that the proposed algorithm outperformed the existing algorithm.

scholarly journals Prediction and Analysis of Surface Quality of Northeast China Ash Wood during Water-Jet Assisted CO2 Laser Cutting

2021 ◽  
Vol 9 (1) ◽  
pp. 119-128
Author(s):  
Ting Jiang ◽  
Chunmei Yang ◽  
Yueqiang Yu ◽  
Bakary S. Doumbia ◽  
Jiuqing Liu ◽  
...  
Keyword(s):  
Surface Quality ◽  
Co2 Laser ◽  
Northeast China ◽  
Laser Cutting ◽  
Water Jet

scholarly journals Mems Technology Quality Requirements as Applied to Multibeam Echosounder

2018 ◽  
Vol 25 (4) ◽  
pp. 59-64
Author(s):  
Krzysztof Bikonis ◽  
Jerzy Demkowicz
Keyword(s):  
Inertial Sensors ◽  
Low Cost ◽  
Microelectromechanical System ◽  
Power Efficient ◽  
Inertial Measurement ◽  
Multibeam Echosounder ◽  
Mems Technology ◽  
Measurement Units ◽  
And Performance

Abstract Small, lightweight, power-efficient and low-cost microelectromechanical system (MEMS) inertial sensors and microcontrollers available in the market today help reduce the instability of Multibeam Sonars. Current MEMS inertial measurement units (IMUs) come in many shapes, sizes, and costs - depending on the application and performance required. Although MEMS inertial sensors offer affordable and appropriately scaled units, they are not currently capable of meeting all requirements for accurate and precise attitudes, due to their inherent measurement noise. The article presents the comparison of different MEMS technologies and their parameters regarding to the main application, namely Multibeam Echo Sounders (MBES). The quality of MEMS parameters is crucial for further MBES record-processing. The article presents the results of undertaken researches in that area, and these results are relatively positive for low-cost MEMS. The paper undertakes some vital aspect of using MEMS in the attitude and heading reference system (AHRS) context. The article presents a few aspects of MEMS gyro errors and their estimation process in the context of INS processing flow, as well as points out the main difficulties behind the INS when using a few top MEMS technologies.

Investigation of the effect of nanofillers on the quality of CO2 laser cutting of FRP nanocomposites

2016 ◽  
Vol 90 (5-8) ◽  
pp. 2047-2061 ◽  
Author(s):  
S. Nagesh ◽  
H. N. Narasimha Murthy ◽  
Ratna Pal ◽  
S. D. Supreeth Dev ◽  
M. Krishna
Keyword(s):  
Co2 Laser ◽  
Laser Cutting

Low Cost Fabrication and Performance of YSZ Electrolyte Thin-Substrate

2007 ◽  
Vol 280-283 ◽  
pp. 439-442
Author(s):  
Da Ming Chen ◽  
Xiao Guang Liu ◽  
Jian Feng Tong ◽  
Bao Wei Li
Keyword(s):  
Ph Value ◽  
Low Cost ◽  
Solid Content ◽  
High Density ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Gel Casting ◽  
A New Technique ◽  
And Performance ◽  
Ysz Electrolyte

A new technique for the fabrication of yttria stabilized zirconia (YSZ) substrates using aqueous gel-casting has been developed. This technique has been used to fabricate planar thin-substrate YSZ fuel cells. A thin-substrate YSZ electrolyte with high density and low porosity was prepared by this method with 57vol% solid content slurry. The character of the technique was discussed based on the influence of dispersant and pH value on slurry. After sintering, the YSZ electrolyte thickness is between 100 and 200µm, and the electrolyte area is 100 × 100 mm2. The research shows that aqueous gel-casting allows fabricate thin YSZ substrate with high density and homogenous structure. The method is suitable for preparing thin-substrate electrolyte of yttria stabilized zirconia.

Some experimental studies on CO2 laser cutting quality of polymeric materials

2008 ◽  
Vol 198 (1-3) ◽  
pp. 99-104 ◽  
Author(s):  
J. Paulo Davim ◽  
Nuno Barricas ◽  
Marta Conceição ◽  
Carlos Oliveira
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Experimental Studies ◽  
Polymeric Materials
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