Engineering and Technology Journal

Modeling and Simulation of Telescopic Hydraulic for Elevating Purposes

Istabraq H. Abed Al-Hady; Farag M. Mohammed; Jamal A.K. Mohammed

Volume 40, Issue 1 , January 2022, , Page 226-232

https://doi.org/10.30684/etj.v40i1.2253

Abstract

The hydraulic cylinder is widely used in industry as the load lifting structures. A telescopic hydraulic cylinder is a special design of a cylinder with a series of gradually smaller ... Read More ...

Modeling of Air-Water Filled Rubber Dam Under Hydrostatic Conditions

Qusay S. Khaleel; Thair S. Khayyun; Khudhayer N. Abdullah

Volume 39, Issue 12 , December 2021, , Page 1976-1987

https://doi.org/10.30684/etj.v39i12.1968

Abstract

Inflatable dams, also called rubber dams, are flexible cylindrical inflatable and deflatable structures attached to a rigid base; these dams are basically cylindrical tubes made of ... Read More ... Inflatable dams, also called rubber dams, are flexible cylindrical inflatable and deflatable structures attached to a rigid base; these dams are basically cylindrical tubes made of rubberized material and inflated by air, water, or a combination of the two. In this paper, the air/water inflatable dam was studied and analyzed numerically using ANSYS software. The 3-parameter Mooney-Rivlin Model was used to model the rubber material of the dam. At first, a physical model from literature was used to calibrate the results of the ANSYS software, and then a new model was analyzed with different dimensions and conditions. Thirty-six simulations were made using the ANSYS software to calibrate the software, based on experimental results from the literature. The simulations achieved a very low error rate compared to the experimental findings, with a maximum error rate of 1.45 percent. After that, a new air/water-filled dam model simulation was carried out. The new inflatable dam was analyzed with large dimensions that can be used to reserve water at high elevations. Several water heights (2, 4, 6, 8, and 10 m) were used as input at the upstream of the dam, and their effect on the dam body was verified on the assumption that there was no water downstream of the dam for all simulations. The height of the used inflatable dam was assumed to be 11 meters (first 5.5 m water pressure and the second 5.5m different air pressure values), and the bottom gaskets was 9.7 meters wide. It is evident from the analysis that the upstream water appears to push the dam to the right side (towards downstream), causing a change in dam equilibrium shape. The difference in the cross-sectional equilibrium profile of the dam is due to the change in air and water pressures on the element. Thus, it changes the tension and slope of the dam membrane elements. The simulation results showed that the membrane tension increases as the upstream head increases, and as the internal pressure increases, the tension increases. This rise in tension as the upstream head rises may be due to the rise in the forces on the element, and hence the membrane tension increases.

Influence of Corrosion Rate on the Double Butt Welding Shapes Design for Low Carbon Steel

Hani Aziz Ameen; Khairia Salman Hassan; Walid Khalid Abdul Kader

Volume 29, Issue 6 , April 2011, , Page 1094-1106

https://doi.org/10.30684/ etj.29.6.5

Abstract

The aim of this paper is to demonstrate the influence of butt welding shapes on the corrosion rate, microstructure and temperature of carbon steel type St37.The double butt welding ... Read More ...

Influence of Butt Welding Shapes Design on the Microstructure and Stresses of Low Carbon Steel

Hani Aziz Ameen; Khairia Salman Hassan

Volume 28, Issue 15 , July 2010, , Page 5036-5047

https://doi.org/10.30684/etj.28.15.12

Abstract

The aim of this paper is to demonstrate the influence of butt welding shapes on the microstructure, temperature and equivalent stresses of carbon steel type St- 37.The single butt welding ... Read More ...

Effect of Shaft Misalignment on The Stresses Distribution of Spur Gears

Hani Aziz Ameen

Volume 28, Issue 7 , March 2010, , Page 1321-1339

https://doi.org/10.30684/etj.28.7.5

Abstract

Shaft misalignment is considered as one of the common repeatedproblems in most rotating machineries , which leads to generate vibrations andextra dynamic loads on transmitting gears ... Read More ...

Keywords = Ansys software

Modeling and Simulation of Telescopic Hydraulic for Elevating Purposes

Abstract

Modeling of Air-Water Filled Rubber Dam Under Hydrostatic Conditions

Abstract

Influence of Corrosion Rate on the Double Butt Welding Shapes Design for Low Carbon Steel

Abstract

Influence of Butt Welding Shapes Design on the Microstructure and Stresses of Low Carbon Steel

Abstract

Effect of Shaft Misalignment on The Stresses Distribution of Spur Gears

Abstract