Engineering and Technology Journal

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.

Investigation of Thickness Distribution Variation in Deep Drawing of Conical Steel Products

Muhsin J. Jweeg; Adnan I. mohammed; Mohammed S. Jabbar

Volume 39, 4A , April 2021, , Page 586-598

https://doi.org/10.30684/etj.v39i4A.1908

Abstract

This study investigates the thickness variation behavior of deep drawing conical products under the effect of different forming parameters such as die wall inclination angle, punch ... Read More ...

Temperature Control of a Target Plate under Variable Flow of Impinging Air from an Orifice

Adnan A. Abdel Rasool; Yahya A. Faraj; Roaad K. Mohammed A

Volume 32, Issue 12 , November 2014, , Page 3009-3026

https://doi.org/10.30684/etj.32.12A.12

Abstract

This work concerns with experimental and numerical study for the cooling characteristics of a target plate under the effect of air impingement from orifice of different sizes D of (5,10,15 ... Read More ...

Effect of Blank Holder Inclination Angle on Deep Drawing of Round Mild Steel Cup with Flange

Karem M. Younis; Jalil J. Shukur

Volume 32, Issue 7 , August 2014, , Page 1764-1775

https://doi.org/10.30684/etj.32.7A12

Abstract

The work aim to study the effect of the blank holder slope angle on deep drawing parameters such as: punch force, strain state and thickness distribution along cup wall of drawn part. ... Read More ...

Numerical Simulation Of Two Dimensional Transient Natural Convection Heat Transfer From Isothermal Horizontal Cylindrical Annuli

K. Hassan Ayad; M. A. Al-lateef Jasim

Volume 25, Issue 6 , August 2007, , Page 728-745

https://doi.org/10.30684/etj.25.6.4

Abstract

Numerical solutions are presented for the transient natural convection heattransfer problem in horizontal isothermal cylindrical annuli, enclosed in heatedinner and cooled outer cylinders. ... Read More ...

Keywords = Numerical simulation

Modeling of Air-Water Filled Rubber Dam Under Hydrostatic Conditions

Abstract

Investigation of Thickness Distribution Variation in Deep Drawing of Conical Steel Products

Abstract

Temperature Control of a Target Plate under Variable Flow of Impinging Air from an Orifice

Abstract

Effect of Blank Holder Inclination Angle on Deep Drawing of Round Mild Steel Cup with Flange

Abstract

Numerical Simulation Of Two Dimensional Transient Natural Convection Heat Transfer From Isothermal Horizontal Cylindrical Annuli

Abstract