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Design and Finite Elements Analysis of a Hydraulic Excavator’s Robot Arm System
Drissa Mohamed Malo,
Erol Uzal,
Sagnaba Soulama,
Abdou-Salam Ganame
Issue:
Volume 7, Issue 3, September 2019
Pages:
35-44
Received:
3 June 2019
Accepted:
15 July 2019
Published:
31 July 2019
Abstract: Rapid growth of mining, construction and industrial activities is supported by automated high-performance machineries with sophisticated mechanism like hydraulic excavators. In this research paper, studies and researches have been carried out on the boom-arm-bucket robot system of a hydraulic excavator used especially on industrial, construction and mining sites. These studies provide general information about the technical specifications of this system. In order to improve the system’s performances, finite elements stress analyses have been carried out. The studies begin with the design of the system using CAD (Computer Aided Design) software. Then a static force analysis of each component has been performed to determine the forces applied on them. The drawings were transferred to the finite element stress analysis software and all required steps for the analysis have been executed. The results obtained from the finite elements analysis revealed that the designed components were safe and subject to stress far below the assigned material’s yield strength. However, the components were heavy and their weight could have been a disadvantage to their use. Design modifications have been performed in order lighten the components and at the same time to decrease their fabrication cost by decreasing the components thickness and changing the assigned material. These modifications also helped to improve their mobility.
Abstract: Rapid growth of mining, construction and industrial activities is supported by automated high-performance machineries with sophisticated mechanism like hydraulic excavators. In this research paper, studies and researches have been carried out on the boom-arm-bucket robot system of a hydraulic excavator used especially on industrial, construction an...
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A Comprehensive Study of Electricity Consumption of People in Each Region in the Philippines
Renz Chester Rosales Gumaru,
Renren Banta
Issue:
Volume 7, Issue 3, September 2019
Pages:
45-48
Received:
26 May 2019
Accepted:
22 August 2019
Published:
5 September 2019
Abstract: Electricity is one of the most important source of energy in our everyday lives. We use it every day in different situations and circumstances. However, it is also the most used and most expensive energy that we always use. This study will determine which region in the Philippines consumed the most and least electricity. It will also study the relationship between the different distributor of electricity and electricity consumption. This study will help the society in solving the problem of dealing will high cost of electricity. Knowing which regions are the most and least consuming in terms of electricity will surely help the government identify why that particular regions consume a lot, or consume less. This study will also determine if there are changes every month in the most and least consuming electricity regions. The researchers also explore different and various problems and factors contributing to the consumption of electricity of each region in the Philippines. And the researchers also seek if there is a significant difference in the consumption of electricity between regions in the National Capital Region, and I n province. This study will surely help and contribute a lot to a developing country like the Philippines, especially the country is known for consumption of too much electricity.
Abstract: Electricity is one of the most important source of energy in our everyday lives. We use it every day in different situations and circumstances. However, it is also the most used and most expensive energy that we always use. This study will determine which region in the Philippines consumed the most and least electricity. It will also study the rela...
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Biological Inspirations in Details Construction and Manufacturing Processes
Adam Ruszaj,
Mariusz Cygnar,
Grzegorz Budzik
Issue:
Volume 7, Issue 3, September 2019
Pages:
49-55
Received:
24 July 2019
Accepted:
25 September 2019
Published:
23 October 2019
Abstract: Any machine-tool or manufacturing process designed by engineers is not as excellent as plants, animals or processes occurring in natural surroundings, which have been designed by The NATURE in evolution process. The bridge between solutions occurring in natural surroundings and technique create the BIONIC. The bionic (from Greece words “bios – life” and “mimesis – to mimic”) is an interdisciplinary science which investigated alive organisms, materials and processes occurring in the natural surroundings in order to apply results in technical solutions. The bionic achievements have been applied in many branches of technique. Nowadays it is very important to start the intensive research on bio-inspired applications in the area of production engineering. However it is not optimistic that there are many factories and engineers who don’t apply bio-inspirations in their professional activities. The results of investigations presented in this paper can encourage for wider applications of bioinspirations in engineering. So, in the paper there are presented general informations about methodology of bio-inspired design. Then, the practical application and results are presented. The special attention is payed for bio-improvements in manufacturing systems, mechanical parts shape and inside structure designing, special properties of surface layer creation and innovations in drilling and grinding operations. The general idea of the paper is to generate some kind of braking down in the classical view on engineering and manufacturing processes further development.
Abstract: Any machine-tool or manufacturing process designed by engineers is not as excellent as plants, animals or processes occurring in natural surroundings, which have been designed by The NATURE in evolution process. The bridge between solutions occurring in natural surroundings and technique create the BIONIC. The bionic (from Greece words “bios – life...
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Research on the RC Panel Experiments with Cushion Layer Upon Rockfall Impact
Mei Xuefeng,
Hu Xiewen,
Wu Jianli
Issue:
Volume 7, Issue 3, September 2019
Pages:
56-63
Received:
22 August 2019
Published:
18 November 2019
Abstract: Reinforced concrete (RC) panels are widely used in the prevention and control of rockfall disasters in mountainous areas. In order to avoid the rigid damage caused by rockfalls that directly impact RC panels, the energy dissipation layer is often added to cushion the impact of rockfalls. In order to study the dynamic response of RC panels to different cushion layers under impact, a series of rockfall tests are carried out based on outdoor test platform. At the same thickness, the maximum impact force of EPS and sand composite cushion reduces by 50% compared with that of sand cushion, and the impact contact time is obviously longer than that of sand. Under the same impact condition, the center position of EPS material is crushed and collapsed, and a large number of radial cracks occur. The composite cushion layer can effectively reduce the mid-span displacement of RC Panel. At the falling height of 3 m, 5 m and 7 m, respectively, the mid-span displacement of RC Panel decreases by 37% to 46%. When sand is used as the cushion layer, the visible cracks in the middle of RC span increase from the bottom to the top. At the falling height of 7 m, the strain rate of concrete ranges from 101 ms-1 to 102 ms-1, while the strain rate of Reinforced ranges from 102 ms-1 to 103m s-1. Therefore, EPS and sand composite cushion layer is superior to sand in terms of energy dissipation effect. Compared with large-scale cluster rockfall prevention, the composite cushion layer has more advantages in preventing and treating single rockfall because of its easy damage, high cost of maintenance and replacement.
Abstract: Reinforced concrete (RC) panels are widely used in the prevention and control of rockfall disasters in mountainous areas. In order to avoid the rigid damage caused by rockfalls that directly impact RC panels, the energy dissipation layer is often added to cushion the impact of rockfalls. In order to study the dynamic response of RC panels to differ...
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A Feasibility Study on GFRP Tubular Concrete Column Damage Detection Using Piezoceramic-transducer-enabled Active Sensing
Issue:
Volume 7, Issue 3, September 2019
Pages:
64-70
Received:
3 November 2019
Published:
3 December 2019
Abstract: Aiming at the crack damage of concrete in GFRP tubular concrete column, a method based on piezoelectric wave method was developed to monitor the crack damage. By transmitting and receiving stress waves from a pair of piezoelectric ceramic sensors embedded in GFRP tubular concrete, the damage degree of GFRP tubular concrete columns was evaluated by using wavelet packets to obtain the stress wave energy and damage index under different load levels. By analyzing the change of stress wave energy and damage index of concrete with different strength under different loads, the time-domain signal response, load-energy curve and load-damage index curve were obtained. In this test, four test pieces were designed according to different concrete strength grades. Two piezoelectric ceramic sensors were placed in the test piece and used to monitor the test piece under static loading. After the static loading was completed, the GFRP tube was severely broken and peeled off from the concrete. A large number of cracks appeared on the concrete surface. The results show that: The test results were consistent with the actual damage of the specimen. The development trend of concrete damage in GFRP tubular concrete columns was well revealed by the wave method.
Abstract: Aiming at the crack damage of concrete in GFRP tubular concrete column, a method based on piezoelectric wave method was developed to monitor the crack damage. By transmitting and receiving stress waves from a pair of piezoelectric ceramic sensors embedded in GFRP tubular concrete, the damage degree of GFRP tubular concrete columns was evaluated by ...
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