American Journal of Engineering Research and Reviews


Analysis and research on new mechanical characteristics of narrow base steel tube tower for transmission line

Research Article of American Journal of Engineering Research and Reviews Analysis and research on new mechanical characteristics of narrow base steel tube tower for transmission line Yunsheng Xu* and Chunyan Li Department of mechanical engineering, North China Electric Power University, Baoding 071000, Hebei Compared with the common angle steel tower, the narrow base steel pipe tower has the advantages of simple structure, beautiful appearance, small floor area and better coordination with the urban environment. In the construction of urban high pressure transmission line, the narrow base tower has its own unique advantages and wide application prospects. It has the advantages of ordinary iron tower processing, transportation, assembly, cost saving, small occupancy of single column steel pipe rod, small line corridor and beautiful beauty. In the optimization design of the narrow tower, how to take the wind vibration coefficient of the tower, how to consider the bending moment of the rod end, the design of the narrow base tower and the structure optimization of the narrow tower tower are all the problems to be solved urgently. In this paper, the modal analysis of a single tower is carried out to determine its vibration mode, and then the wind vibration coefficient of a narrow tower is analyzed. Finally, the influence of x and y direction vibration on the frequency of the tower is obtained. Keywords: Transmission line; Narrow base tower; Frequency; Vibration mode ...

Analysis and Assessment of Agulu-Nnaka Erosion Impact on Human Lives and Infrastructure

Research Article of American Journal of Engineering Research and Reviews Analysis and Assessment of Agulu-Nnaka Erosion Impact on Human Lives and Infrastructure OTTI, V. I and EKENTA, D. E Civil Engineering Department,Nnamdi Azikiwe University,Awka The aim of this study was to rehabilitate the gully erosion site and reduce longer term erosion vulnerability in Agulu/Nanka Community. This activity was carried out through some civil works such as construction of concrete drainage system, culverts and silty basin, spikes, rock chutes and stabilization of gully. An engineering design was used for the erosion gully intervention which highlighted on the detailed civil works that were carried out. An environmental and social management plan study was implemented aimed at identifying potential and social impacts that were associated with the rehabilitation as proposed means of minimizing and mitigating them to acceptable level. Keywords: Agulu-Nnaka Erosion Impact, Human Lives and Infrastructure ...

Tribo evaluation of Surface Treated Carbon Fiber Reinforced Friction Material

Research Article of American Journal of Engineering Research and Reviews Tribo evaluation of Surface Treated Carbon Fiber Reinforced Friction Material Naresh Kumar Konada 1*, K.N.S.Suman 2 1* Department of Mechanical Engineering , Anits Engineering College,Visakhapatnam, INDIA 2 Department of Mechanical Engineering , Andhra University College of Engineering,Visakhapatnam, INDIA Carbon fiber reinforced friction material is formulated by grafting MWCNT-F on its surface. This material combination is investigated in this work by using a wear test apparatus. The surface of CF is chemically inert and hydrophobic in nature and possesses poor bonding strength with polymer matrix. Hence, an attempt is made to improve the bonding behaviour between CF and remaining ingredients. CF surface is modified by grafting multi walled carbon nano tubes functionalized (MWCNT-F) on CF surface. CF content after surface modification is varied in wt% (2%, 3%, 4% and 5%) and mixed with remaining ingredients of friction material. Composite sheets are prepared by using hand layup method. Multi walled Carbon Nano Tubes grafted friction material (MWCRFM), is characterized for SEM. MWCNTs-F on CF surface is observed. Sample specimens are cut from the friction composite sheets and the influence of performance properties like friction, wear, speed, load and time on friction is studied. The behaviour of the samples are also analyzed using regression analysis L9 (3x3) experimental design method for 3 different loads, time periods and speeds. The results reveal that, time and braking pressure plays an important role to control the wear rate and coefficient of friction of the composite. It was also observed that, MWCNT-F grafted on CF specimens for sample M5 (CF 5 wt%) possess less wear rate and high stable coefficient of friction compare to other formulations of materials. Keywords: Multi walled carbon nano tubes, Carbon fibers, Chemical grafting, and Tribological properties ...

Thin Film Diamond For Optical Applications

Research Article of American Journal of Engineering Research and Reviews Thin Film Diamond For Optical Applications Mohammad Abdul Razak1 and Sheikh Irfan Samad1 1College of electrical engineering, Universiti Malaya, Malaysia Diamond is a unique material with robust mechanical properties, the electrical and the optical properties of the thin film diamond can be altered as they are deposited using microwave plasma enhanced chemical vapor deposition (MPCVD) method. The thin film diamond can be used both as optical window for certain wavelengths of light and as a reflector, based on the thickness and the deposition parameters of the thin film diamond. In this paper, we are illustrating a 1 µm thin film diamond that we were able to deposit, pattern and etch selectively using standard microfabrication techniques. This patterning of diamond film allows us to create 3D structures using single crystal diamond. Keywords: crystalline diamond, amorphous diamond, retroreflector, optical, MPCVD ...

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American Journal of Engineering Research and Reviews

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