The AISI 316 L stainless steel was welded using Tungsten Inert Gas (TIG) welding, utilizing terna... more The AISI 316 L stainless steel was welded using Tungsten Inert Gas (TIG) welding, utilizing ternary shielding gases Argon (Ar), Helium (He), and Nitrogen (N2). This study aimed to assess the effects of these ternary shielding gases on the microstructure, bead profile, and bead appearance. It provides a comprehensive grasp of welding parameters' interplay with shielding gas compositions, enabling engineers to make informed choices that significantly influence the excellence, productivity, and lastingness of the welding process. The Taguchi L-27 approach was employed, incorporating different contents of N 2 (2.5 vol. % to 7.5 vol. %) and He (10 vol. % to 30 vol. %) within the Ar shielding gas composition. Additionally, welding current intensities, ranging from 120 A to 180 A, were also used in the experiment. The results demonstrated that higher content of He and N 2 resulted in elevated levels of austenite-forming elements. Therefore, for TIG welding at the arc current intensity of 150 A, it is recommended to utilize the shielding gas mixtures (2.5 vol. % N 2 + 10 vol. % He + 87.5 vol. % Ar). Furthermore, by augmenting the content of both N 2 and He within the Ar shielding gas mixture, in addition to adjusting the arc current, a notable expansion in both the width and depth of the weld profile was achieved. This achievement, in turn, played a pivotal role in securing comprehensive fusion throughout the welding process.
This study investigates the impact of gas metal arc welding (GMAW) parameters on the bead geometr... more This study investigates the impact of gas metal arc welding (GMAW) parameters on the bead geometry and material distortion of AISI 316L. Three parameters—arc current in ampere (A), filler feed rate (m/min), and gas composition—were modified at varying levels in order to examine their effects. This study sheds new light on MAG welding lines’ physical properties and behavior and highlights the influence of quaternary shielding gas compositions. Taguchi analysis, which includes signal-to-noise (S/N) ratio and analysis of variance (ANOVA), was utilized to analyze and optimize the welding parameters. This study found that arc current significantly impacts bead geometry, while the shielding gas composition has the most significant effect on angular distortion and transverse shrinkage. The optimal welding parameters for achieving the best bead height and width are 160 A, 3.5 m/min, G1, with a bead height of 4.89 mm, and 120 A, 3 m/min, G2, with a bead width of 6.69 mm. Moreover, the optima...
The purpose of this research is to study the behavior of AISI 316L steel during the Metal Inert G... more The purpose of this research is to study the behavior of AISI 316L steel during the Metal Inert Gas (MIG) welding process. Three welding parameters are adjusted at three levels of voltage, wire feed, and shielding gas combination (6V, 8V, 10V), (3, 3.5, 4), and (G4, G5, G6). The welding properties are investigated by tensile test strength and Charpy impact test. Ordering parameters are performed based on Taguchi's orthogonal array (L9). The data was analyzed using an analysis of variance (ANOVA) and signal-to-noise (S/N) to determine the optimal welding parameter sets. According to the results of this study, the most influential welding parameter is the gas combination on tensile strength; followed by voltage, wire feed, and gas combination (10V, 3.5, G4). The most influential parameter on maximum elongation is shielding gas. The welding parameter sets the voltage, wire feed, and gas combination (10V, 3.5, G4). The voltage has the most influential parameter on toughness. The wel...
In this paper, a discrete-time model predictive controller using Laguerre orthonormal function-ba... more In this paper, a discrete-time model predictive controller using Laguerre orthonormal function-based (LMPC) for active flutter suppression of a two-dimensional wing with a flap is presented. In this work, a linear mathematical state-space model for the pitch, plunge, and flap degrees of freedom under unsteady aerodynamics is derived and used to determine the linear flutter velocity and frequency of the parameters of a selected experimental wing. To verify the model, the open-loop simulation results are compared to an experimental study using the same wing from the literature. The state-space system is then discretized and LMPC with a Kalman filter is designed and tuned using the MATLAB® simulation environment at a selected speed in the linear flutter region. The predictive control advantage of dealing with input constraints in a systematic manner is explored through a quantitative analysis of the response of both constrained and unconstrained LMPC controllers. The results indicate t...
International Journal of Structural Stability and Dynamics
This paper aims to utilize the modern control theory in designing an active flutter suppression c... more This paper aims to utilize the modern control theory in designing an active flutter suppression controller for a two-dimensional wing with a flap. In this study, the wing’s pitch–plunge linear aeroelastic response, in addition to the control flap motion, was modeled using Lagrange’s energy method, and Theodorsen’s classic unsteady aerodynamic theory. The derived mathematical model was represented in state-space so the modern control techniques can be implemented. The open-loop system was analyzed, and the flutter speed for a selected experimental-wing model was calculated. For model verification purposes, the open-loop simulation results were compared to an experimental study from the literature. Next, a linear quadratic Gaussian (LQG) compensator with integral action was designed and tuned using MATLAB®simulation environment to reach the best possible performance at a selected speed in the flutter region, where the results have proven excellent performance for this kind of controll...
In this paper, the ceramic production in Jordan is investigated using the methodology of exergy a... more In this paper, the ceramic production in Jordan is investigated using the methodology of exergy analysis in order to use energy more efficiently. The major aim of the ceramic industry in Jordan is to minimize the energy cost in order to be a competent industry. The energy and exergy of inputs and outputs for different processes of ceramic production are evaluated. The exergy efficiency is found to be about 48.5% which is considered to be low. This fact in addition to the high cost of energy explains why the ceramic industry in Jordan can't be a strong competent to ceramics imported from other countries. One of the main suggestions to improve this industry is to reuse the waste energy from the kilns in the drying process. Another suggestion is to use the heavy fuel oil (HFO) instead of diesel and kerosene.
2018 5th International Conference on Renewable Energy: Generation and Applications (ICREGA), 2018
Concentrated Solar Collectors are effective in collecting high thermal energy and contributing in... more Concentrated Solar Collectors are effective in collecting high thermal energy and contributing in electricity generation. This study adopted simulation approach by CFD analysis in determining the performance of concentrated solar collectors. The system is modeled and analyzed using ANSYS Fluent. Absorber pipe was modeled. Four cases of heat flux were studied and the temperature variations on the centerline of pipe volume were observed. The results were analyzed by temperature readings and temperature contour at the outlet. The trend of temperature variations observed reassembled a linear regime along the length of the absorber pipe.
2020 Advances in Science and Engineering Technology International Conferences (ASET), 2020
The main objective of this work is to calculate the harvested voltage and power from piezoelectri... more The main objective of this work is to calculate the harvested voltage and power from piezoelectric stack installed in the quarter and half car models. Both models are subjected to random excitation at different road classes. The mathematical models are built and developed by using MATLAB/Simulink. The obtained results show that harvested voltage and power are increased with the road roughness levels and car velocity. From very smooth to very rough road levels, the harvested power was increased by 434 mW for quarter car model and 537 mW for half car model.
2020 Advances in Science and Engineering Technology International Conferences (ASET), 2020
The design of the tube-to-tubesheet joints is very critical to the functioning of the heat exchan... more The design of the tube-to-tubesheet joints is very critical to the functioning of the heat exchangers. In an expansion process, the pressure that is applied on the inner tube surface causes the tube to deform radially outward. Further plastic deformation of the tube, while tube in contact with the tubesheet, creates a contact pressure at the interface. Therefore, an optimum expansion pressure adequately develops sufficient contact pressure at the tube-to-tubesheet interface. Wall thinning percentage is generally used in practice to estimate the right amount of expansion. This paper focusses on the wall thickness reduction expressed in percentage, radial displacement of the inner tube surface, contact pressure and theoretical pull-out force for a various expansion pressure range. Results show that an expansion pressure lower than the yield stress of the tube does not fully close the gap between the tube and tubesheet. There is an evident spring back of radial displacement and contact pressure due to bauschinger effect upon retrieving the expansion pressure. However, the maximum radial displacement and contact pressure increase as expansion pressure increases. All the expansion pressures above the tube yield stress were sufficient to close the initial gap of the tube-to-tubesheet joint. A sudden increase in the radial displacement was observed for expansion pressures above tubesheet yield stress. Expansion pressure from 240 MPa to 340 MPa resulted in wall thinning percentage of 1.15% to 2.97%. Since the pullout strength and contact pressure are interrelated, high expansion pressure resulted in greater pull-out strength.
... Tariq Darabseh a , Malak Naji a & Moh'D Al-Nimr a pages 632-642. ... Abd-All... more ... Tariq Darabseh a , Malak Naji a & Moh'D Al-Nimr a pages 632-642. ... Abd-Alla [1212. Abd-Alla, AM 1995. Thermal Stress in a Transversely Isotropic Circular Cylinder Due to an Instantaneous Heat Source. Applied Mathematics and Computation , vol. 68: 113124. ...
In this paper, the ceramic production in Jordan is investigated using the methodology of exergy a... more In this paper, the ceramic production in Jordan is investigated using the methodology of exergy analysis in order to use energy more efficiently. The major aim of the ceramic industry in Jordan is to minimize the energy cost in order to be a competent industry. The energy and exergy of inputs and outputs for different processes of ceramic production are evaluated. The exergy efficiency is found to be about 48.5% which is considered to be low. This fact in addition to the high cost of energy explains why the ceramic industry in Jordan can't be a strong competent to ceramics imported from other countries. One of the main suggestions to improve this industry is to reuse the waste energy from the kilns in the drying process. Another suggestion is to use the heavy fuel oil (HFO) instead of diesel and kerosene.
This paper considers the transient thermal stresses in a circular cylinder made of a functionally... more This paper considers the transient thermal stresses in a circular cylinder made of a functionally graded material (FGM). The cylinder material is considered to be graded along the radial direction, where an exponentially varying distribution is assumed. The material is assumed to be isotropic with constant Poisson's ratio. The cylinder is subjected to a constant temperature at the surface. A numerical method based on implicit finite difference scheme is used to calculate the temperature, radial displacement and stress distributions within the cylinder. The time dependent temperature, radial displacement, radial stress, hoop stress, and axial stress are plotted for a FGM consists of ceramic ZrO2 and alloy Ti-6Al-4V.
IOP Conference Series: Materials Science and Engineering
The flutter of a tapered viscoelastic wing carrying an engine and subjected to a follower thrust ... more The flutter of a tapered viscoelastic wing carrying an engine and subjected to a follower thrust force is investigated. The wing is considered as a cantilever tapered Euler-Bernoulli beam, made of a linear viscoelastic material where Kelvin-Voigt model is assumed to represent the viscoelastic behaviour of the material. In addition, quasi-steady and unsteady aerodynamic forces models are introduced along with the follower thrust force. The mass and inertia of the engine are modelled in order to achieve more realistic behaviour of the engine upon flutter characteristics of the system. Moreover, the governing equations of motion are derived through the Extended Hamilton's Principle. The generalized function theory is used to more accurately consider the contribution of the mass and its follower force in the governing equations. The resulting partial differential equations are solved by Galerkin method along with the classical flutter investigation approach. Parametric studies highlighting the sensitivity of the chord-wise engine location, the span-wise engine location, and the vertical engine location on the flutter speed and flutter frequency are reported. It is found that the location of the engine in the three directions play an important role in the dynamic stability of the wing.
The AISI 316 L stainless steel was welded using Tungsten Inert Gas (TIG) welding, utilizing terna... more The AISI 316 L stainless steel was welded using Tungsten Inert Gas (TIG) welding, utilizing ternary shielding gases Argon (Ar), Helium (He), and Nitrogen (N2). This study aimed to assess the effects of these ternary shielding gases on the microstructure, bead profile, and bead appearance. It provides a comprehensive grasp of welding parameters' interplay with shielding gas compositions, enabling engineers to make informed choices that significantly influence the excellence, productivity, and lastingness of the welding process. The Taguchi L-27 approach was employed, incorporating different contents of N 2 (2.5 vol. % to 7.5 vol. %) and He (10 vol. % to 30 vol. %) within the Ar shielding gas composition. Additionally, welding current intensities, ranging from 120 A to 180 A, were also used in the experiment. The results demonstrated that higher content of He and N 2 resulted in elevated levels of austenite-forming elements. Therefore, for TIG welding at the arc current intensity of 150 A, it is recommended to utilize the shielding gas mixtures (2.5 vol. % N 2 + 10 vol. % He + 87.5 vol. % Ar). Furthermore, by augmenting the content of both N 2 and He within the Ar shielding gas mixture, in addition to adjusting the arc current, a notable expansion in both the width and depth of the weld profile was achieved. This achievement, in turn, played a pivotal role in securing comprehensive fusion throughout the welding process.
This study investigates the impact of gas metal arc welding (GMAW) parameters on the bead geometr... more This study investigates the impact of gas metal arc welding (GMAW) parameters on the bead geometry and material distortion of AISI 316L. Three parameters—arc current in ampere (A), filler feed rate (m/min), and gas composition—were modified at varying levels in order to examine their effects. This study sheds new light on MAG welding lines’ physical properties and behavior and highlights the influence of quaternary shielding gas compositions. Taguchi analysis, which includes signal-to-noise (S/N) ratio and analysis of variance (ANOVA), was utilized to analyze and optimize the welding parameters. This study found that arc current significantly impacts bead geometry, while the shielding gas composition has the most significant effect on angular distortion and transverse shrinkage. The optimal welding parameters for achieving the best bead height and width are 160 A, 3.5 m/min, G1, with a bead height of 4.89 mm, and 120 A, 3 m/min, G2, with a bead width of 6.69 mm. Moreover, the optima...
The purpose of this research is to study the behavior of AISI 316L steel during the Metal Inert G... more The purpose of this research is to study the behavior of AISI 316L steel during the Metal Inert Gas (MIG) welding process. Three welding parameters are adjusted at three levels of voltage, wire feed, and shielding gas combination (6V, 8V, 10V), (3, 3.5, 4), and (G4, G5, G6). The welding properties are investigated by tensile test strength and Charpy impact test. Ordering parameters are performed based on Taguchi's orthogonal array (L9). The data was analyzed using an analysis of variance (ANOVA) and signal-to-noise (S/N) to determine the optimal welding parameter sets. According to the results of this study, the most influential welding parameter is the gas combination on tensile strength; followed by voltage, wire feed, and gas combination (10V, 3.5, G4). The most influential parameter on maximum elongation is shielding gas. The welding parameter sets the voltage, wire feed, and gas combination (10V, 3.5, G4). The voltage has the most influential parameter on toughness. The wel...
In this paper, a discrete-time model predictive controller using Laguerre orthonormal function-ba... more In this paper, a discrete-time model predictive controller using Laguerre orthonormal function-based (LMPC) for active flutter suppression of a two-dimensional wing with a flap is presented. In this work, a linear mathematical state-space model for the pitch, plunge, and flap degrees of freedom under unsteady aerodynamics is derived and used to determine the linear flutter velocity and frequency of the parameters of a selected experimental wing. To verify the model, the open-loop simulation results are compared to an experimental study using the same wing from the literature. The state-space system is then discretized and LMPC with a Kalman filter is designed and tuned using the MATLAB® simulation environment at a selected speed in the linear flutter region. The predictive control advantage of dealing with input constraints in a systematic manner is explored through a quantitative analysis of the response of both constrained and unconstrained LMPC controllers. The results indicate t...
International Journal of Structural Stability and Dynamics
This paper aims to utilize the modern control theory in designing an active flutter suppression c... more This paper aims to utilize the modern control theory in designing an active flutter suppression controller for a two-dimensional wing with a flap. In this study, the wing’s pitch–plunge linear aeroelastic response, in addition to the control flap motion, was modeled using Lagrange’s energy method, and Theodorsen’s classic unsteady aerodynamic theory. The derived mathematical model was represented in state-space so the modern control techniques can be implemented. The open-loop system was analyzed, and the flutter speed for a selected experimental-wing model was calculated. For model verification purposes, the open-loop simulation results were compared to an experimental study from the literature. Next, a linear quadratic Gaussian (LQG) compensator with integral action was designed and tuned using MATLAB®simulation environment to reach the best possible performance at a selected speed in the flutter region, where the results have proven excellent performance for this kind of controll...
In this paper, the ceramic production in Jordan is investigated using the methodology of exergy a... more In this paper, the ceramic production in Jordan is investigated using the methodology of exergy analysis in order to use energy more efficiently. The major aim of the ceramic industry in Jordan is to minimize the energy cost in order to be a competent industry. The energy and exergy of inputs and outputs for different processes of ceramic production are evaluated. The exergy efficiency is found to be about 48.5% which is considered to be low. This fact in addition to the high cost of energy explains why the ceramic industry in Jordan can't be a strong competent to ceramics imported from other countries. One of the main suggestions to improve this industry is to reuse the waste energy from the kilns in the drying process. Another suggestion is to use the heavy fuel oil (HFO) instead of diesel and kerosene.
2018 5th International Conference on Renewable Energy: Generation and Applications (ICREGA), 2018
Concentrated Solar Collectors are effective in collecting high thermal energy and contributing in... more Concentrated Solar Collectors are effective in collecting high thermal energy and contributing in electricity generation. This study adopted simulation approach by CFD analysis in determining the performance of concentrated solar collectors. The system is modeled and analyzed using ANSYS Fluent. Absorber pipe was modeled. Four cases of heat flux were studied and the temperature variations on the centerline of pipe volume were observed. The results were analyzed by temperature readings and temperature contour at the outlet. The trend of temperature variations observed reassembled a linear regime along the length of the absorber pipe.
2020 Advances in Science and Engineering Technology International Conferences (ASET), 2020
The main objective of this work is to calculate the harvested voltage and power from piezoelectri... more The main objective of this work is to calculate the harvested voltage and power from piezoelectric stack installed in the quarter and half car models. Both models are subjected to random excitation at different road classes. The mathematical models are built and developed by using MATLAB/Simulink. The obtained results show that harvested voltage and power are increased with the road roughness levels and car velocity. From very smooth to very rough road levels, the harvested power was increased by 434 mW for quarter car model and 537 mW for half car model.
2020 Advances in Science and Engineering Technology International Conferences (ASET), 2020
The design of the tube-to-tubesheet joints is very critical to the functioning of the heat exchan... more The design of the tube-to-tubesheet joints is very critical to the functioning of the heat exchangers. In an expansion process, the pressure that is applied on the inner tube surface causes the tube to deform radially outward. Further plastic deformation of the tube, while tube in contact with the tubesheet, creates a contact pressure at the interface. Therefore, an optimum expansion pressure adequately develops sufficient contact pressure at the tube-to-tubesheet interface. Wall thinning percentage is generally used in practice to estimate the right amount of expansion. This paper focusses on the wall thickness reduction expressed in percentage, radial displacement of the inner tube surface, contact pressure and theoretical pull-out force for a various expansion pressure range. Results show that an expansion pressure lower than the yield stress of the tube does not fully close the gap between the tube and tubesheet. There is an evident spring back of radial displacement and contact pressure due to bauschinger effect upon retrieving the expansion pressure. However, the maximum radial displacement and contact pressure increase as expansion pressure increases. All the expansion pressures above the tube yield stress were sufficient to close the initial gap of the tube-to-tubesheet joint. A sudden increase in the radial displacement was observed for expansion pressures above tubesheet yield stress. Expansion pressure from 240 MPa to 340 MPa resulted in wall thinning percentage of 1.15% to 2.97%. Since the pullout strength and contact pressure are interrelated, high expansion pressure resulted in greater pull-out strength.
... Tariq Darabseh a , Malak Naji a & Moh'D Al-Nimr a pages 632-642. ... Abd-All... more ... Tariq Darabseh a , Malak Naji a & Moh'D Al-Nimr a pages 632-642. ... Abd-Alla [1212. Abd-Alla, AM 1995. Thermal Stress in a Transversely Isotropic Circular Cylinder Due to an Instantaneous Heat Source. Applied Mathematics and Computation , vol. 68: 113124. ...
In this paper, the ceramic production in Jordan is investigated using the methodology of exergy a... more In this paper, the ceramic production in Jordan is investigated using the methodology of exergy analysis in order to use energy more efficiently. The major aim of the ceramic industry in Jordan is to minimize the energy cost in order to be a competent industry. The energy and exergy of inputs and outputs for different processes of ceramic production are evaluated. The exergy efficiency is found to be about 48.5% which is considered to be low. This fact in addition to the high cost of energy explains why the ceramic industry in Jordan can't be a strong competent to ceramics imported from other countries. One of the main suggestions to improve this industry is to reuse the waste energy from the kilns in the drying process. Another suggestion is to use the heavy fuel oil (HFO) instead of diesel and kerosene.
This paper considers the transient thermal stresses in a circular cylinder made of a functionally... more This paper considers the transient thermal stresses in a circular cylinder made of a functionally graded material (FGM). The cylinder material is considered to be graded along the radial direction, where an exponentially varying distribution is assumed. The material is assumed to be isotropic with constant Poisson's ratio. The cylinder is subjected to a constant temperature at the surface. A numerical method based on implicit finite difference scheme is used to calculate the temperature, radial displacement and stress distributions within the cylinder. The time dependent temperature, radial displacement, radial stress, hoop stress, and axial stress are plotted for a FGM consists of ceramic ZrO2 and alloy Ti-6Al-4V.
IOP Conference Series: Materials Science and Engineering
The flutter of a tapered viscoelastic wing carrying an engine and subjected to a follower thrust ... more The flutter of a tapered viscoelastic wing carrying an engine and subjected to a follower thrust force is investigated. The wing is considered as a cantilever tapered Euler-Bernoulli beam, made of a linear viscoelastic material where Kelvin-Voigt model is assumed to represent the viscoelastic behaviour of the material. In addition, quasi-steady and unsteady aerodynamic forces models are introduced along with the follower thrust force. The mass and inertia of the engine are modelled in order to achieve more realistic behaviour of the engine upon flutter characteristics of the system. Moreover, the governing equations of motion are derived through the Extended Hamilton's Principle. The generalized function theory is used to more accurately consider the contribution of the mass and its follower force in the governing equations. The resulting partial differential equations are solved by Galerkin method along with the classical flutter investigation approach. Parametric studies highlighting the sensitivity of the chord-wise engine location, the span-wise engine location, and the vertical engine location on the flutter speed and flutter frequency are reported. It is found that the location of the engine in the three directions play an important role in the dynamic stability of the wing.
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