ليليان ياسر ياسين احمد

Academic Degree: Other

Supervisor Type: Supervisor

Supervisor State: Graduated

ليليان ياسر ياسين احمد was under my Supervision of (Postgraduate Diploma or Higher Diploma, her thesis Title was (Numerical Investigation for the Mechanical Properties of E-glass Fiber Panel Under Indentation Load) had been graduated 2022)

الحان سالم صالح سلطان

Academic Degree: Other

Supervisor Type: Supervisor

Supervisor State: Graduated

post graduate ( Postgraduate Diploma or Higher Diploma) in mechanical Engineering Student was under my supervision his Thesis title (Mechanical Behaviour investigation of Hybrid Composite for E-glass and Basalt Fiber Reinforcement Epoxy Under three Bending Moment) graduated 2002

Bachelors (B. Sc.)

I had been graduated as (B.Sc. degree) in Mechanical Engineering from University Technology / Baghdad in 1998

Masters (M.Sc.) in Mechanical Engineering

I had been graduated as (M.Sc. degree) in Mechanical Engineering from University Technology / Baghdad in 2004

(Ph.D degree) in Mechanical Engineering

I had been graduated as (Ph.D degree) in Mechanical Engineering from University Technology Malaysia (UTM-JB) / Johor Bahru in 2016

(workshop Lab., computer Lab.) test experiments and professional training [Graduate Teaching Assistant (Engineer)]

workshop Lab (Lathe machine, horizontal milling machines, vertical milling machines, Drilling machines, grinding machines, Vise tool, measurements tools) test experiments and professional training
Computer Lab. professional training

Engineering Technical college mosul - teaching undergraduate courses experimentally in Lab.and teaching, Supervised lab sessions and supported students with technical assignments [Assistant Lecturer]

Engineering Technical college Mosul - From [15 Aug 2005] to [31 Oct 2016] - teaching undergraduate courses experimentally in Lab.and teaching
Such as [Eng. Drawing+ Mechanical Drawing+Computer Principals (all Levels)+Descriptive Geometry + workshop Lab+ Computer Lab]
Supervised lab sessions and supported students with technical assignments.
Graded assignments and exams, and held office hours for consultation.
Research Assistant

Lecturing under graduate and Post graduate, Professional Training, workshops, researcher [Lecturer (Ph.D Doctor)]

Lecturing under graduate and Post graduate in Engineering Technical college Mosul such as [Engineering Materials+ Design+ Eng. Drawing+ Mechanical Drawing+ Automated Systems+ Automated Production line Design+ Methoology + Computer Principales (all Levels)+ Descrptive Geometry + Engineering analysis+ Graduation Projects+ Mechanicl Systems Modeling + Machine Maintenance+ Engineering Mechanics statics+ Engineering Mechanics Dynamics+ English Language+ Strength of Materials+Theory of Machines+Vibrations +Productions Processes .
Professional Training in workshop lab and Computer Lab. workshops for all students and employers.
researcher [Publishing about 14 researches such as:
1- Improving Hollow Thick Cylinder Strength by using shrikfit Process.
2- Improving Hollow Thick Cylinder Strength by using Autofrettage Process.
3- Mechanical Behavior Analysis Of Composite Multilayered Hybrid Natural/Glass Fiber Tube Under Internal Pressure.
4- Impact response of laminated composite cylindrical shell: Finite element simulation approach.
5- Static analysis of stitched sandwich beams with functionally graded foam core.
6- Mechanical behavior of functionally graded sandwich hollow cylinders under internal pressure.
7- Mechanical Behavior of Composite Multilayered Basalt/E-Glass/Epoxy Pipe under Internal Pressure.
8- Numerical Investigation of Hybrid of Eglass and Basalt Fiber Reinforced Epoxy Tube Pressurized Internally.
9- An Experimentally and Numerically Comparison between E-Glass/Epoxy and Basalt/Epoxy Pipes Pressurized Internally.
10- Experimentally Shear behavior comparison between woven glass fiber/Polyester and Polyester.
11- Corrosion of Carbon Steel and alloy Steel: effect of humidity and hydrochloric acid.
12- Effects of Heat Treatment on Microstructure and Mechanical Properties of D-6A AISI Medium-Carbon Low-Alloy Steel.
13- Shear Behavior Investigation Between Lightweight Metals and Composite Materials.
14- Hollow FGM Sandwich Cylinders Numerically Analysis.

Lecturing under graduate and Post graduate, Professional Training, workshops, researcher [Assistant Professor (Ph.D Doctor)]

Lecturing under graduate and Post graduate such as [Engineering Materials+ Design+ Eng. Drawing+ Mechanical Drawing+ Automated Systems+ Automated Production line Design+ Methoology + Computer Principales (all Levels)+ Descrptive Geometry + Engineering analysis+ Graduation Projects+ Mechanicl Systems Modeling + Machine Maintenance+ Engineering Mechanics statics+ Engineering Mechanics Dynamics+ English Language+ Strength of Materials+Theory of Machines+Vibrations +Productions Processes]
Professional Training in Workshop Lab. and Computer Lab.
workshops for all students [PG and UD] and all employers
researcher [Publishing paper such as (14- Hollow FGM Sandwich Cylinders Numerically Analysis.)

Shear Behavior Investigation Between Lightweight Metals and Composite Materials

Journal Journal of Advanced Manufacturing Systems

publisher World Scientific Publishing Company

DOI 10.1142/S0219686724500318

Issue 04 pp. 727-740

Volume 23

Recently, composites have attracted many researchers, which have advanced favored properties compared to metallic materials, such as high strength with lightweight as well as corrosion and erosion resistance and others. However, these resources are exposed to yield during the working life. For these new products and their employing in different applications, and for the mentioned importance, this study has investigated the mechanical characteristics of these structures to avoid potential failure. An investigation of Arcan (shear V-notch test) procedure has been conducted for epoxy resin which is used for reimpregnations with Eglass and compared with lightweight metal of Aluminum as a benchmark to show the shear behavior for the composite one under shear load experimentally and numerically. The butterfly-shaped sample was modeled and tested accordingly with Arcan (shear V-notch test) numerically in order to produce pure shear force by tensile subjection condition using ANSYS software. The test verified that a state of pure shear was present during the testing on each ±45° inclined from the axis of subjection although the changes recorded as G magnitude of shear modulus between Aluminum and the thermoplastic of Epoxy resin is nearby 94%, which may be because of the effect of material nature (i.e. mechanical properties) for the selected materials. The mentioned novel constituent shear behaviors have been investigated and compared expediently. These novel constituents can be adopted in different applications of shear loads.

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Corrosion of Carbon Steel and alloy Steel: effect of humidity and hydrochloric acid

Journal Materials Science and Engineering

publisher Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), Malaysia.

DOI 10.1088/1757-899X/1173/1/012061

Issue 1173/1/012061

Volume 1

The corrosion performance of hypo-eutectoid carbon steel, and alloy steel used in steam boilers at Al-Najibiyah Thermal Power Station in the Iraqi city of Basra was investigated. These metals were exposed to different media such as moisture and acids for (30, 45, and 60) days, then the rate of corrosion was calculated in a way of weight loss. The influence of carbon content, corrosive media and duration of immersion on samples of hypo-eutectic carbon steel and alloy steel were studied. The results showed an increase in the percentage of corrosion as a result of the increase in carbon content, and alloy steel has a high resistance to corrosion than carbon steel in the different corrosive media used in this study.

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Experimentally Shear behavior comparison between woven glass fiber/Polyester and Polyester

Journal Journal of Mechanical Engineering

publisher Faculty of Mechanical Engineering, Universiti Teknologi MARA (UiTM), Malaysia.

DOI 10.4028/www.scientific.net/AMR.1125.227

Issue 65-77, 2020

Volume Vol SI 9(1)

Composite woven E-glass/polyester panels had demonstrated better mechanical properties compared to metallic or pure polymers. Their high strength to weight ratios, corrosion and erosion resistance as well as other properties had been shown in studies to be better in contrast to metallic or pure polymers. However, vital information on the performance of composite woven E-glass/polyester under service conditions is scarce. There is the need to investigate its mechanical stability and shear behavior under stressful service-like conditions in order to determine its performance limits. The current research examines the mechanical behavior of woven glass fiber/polyester and polyester resin. The method subjects butterfly shape specimens, using the Arcan test fixture, to pure shear by tensile load conditions to obtain the shear strength, and shear modulus, G of the test specimens. The results show stress strain curves linearly propagated on each ±45 degree direction from the loading axis although the different recorded strain value between strains gauges +45° and -45º is about 7%, which may be caused by the effect of porosity (i.e. air bubbles) in the specimens. Eglass/polyester showed strengthens shear properties structure than polyester resin.

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An Experimentally and Numerically Comparison between E-Glass/Epoxy and Basalt/Epoxy Pipes Pressurized Internally.

Journal Solid State Phenomena

publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/SSP.305.49

Issue 1662-9779, pp 49-56

Volume Vol. 305

The current composite pipes such as E-glass have better properties compared to metallic pipes. However, these pipes are prone to failure during its service life. In contrast, natural fiber such as basalt fiber composite pipes has better mechanical characteristics compared to current composite pipes. Hoop tensile, longitudinal tensile and internal pressure loads were carried out through experimentally and numerically investigation on the basalt/epoxy and E-glass/epoxy pipe performance. The basalt/epoxy and E-glass/epoxy composite pipes have been manufactured with ±55o winding angle using dry filament winding with impregnation of epoxy resin used Vacuum Infusion Process (VIP) technique and investigated. Basalt and E-glass composite pipes with winding angles of ±45o, ±55o, ±65o, ±75o were fabricated in order to assess the optimal winding angle which can resists the subjected loads. There were good agreement between numerical and experimental results have been recorded. For internal pressure test, the basalt pipes have more internal pressure carrying capacity more than E-glass by 2.41%. Through this investigation, can be concluded that the natural based fiber of basalt can be used as a suitable replacement than E-glass, has further advantages of being cheap, abundant, renewable and easily recyclable. The also possess high strength, excellent flexural stiffness to cost ratio and low thermal conductivity

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Numerical Investigation of Hybrid of Eglass and Basalt Fiber Reinforced Epoxy Tube Pressurized Internally

Journal Materials Science and Engineering

publisher IOP Publishing

DOI 10.1088/1757-899X/638/1/012012

Issue 012012

Volume 638 (2019)

The composite hybrid pipe is a novel structure made of concentric composite multilayer possess improved thermal and mechanical properties better than its original components. At variance experimental analysis, the numerical studies on the structure and behavior of composite hybrid natural fiber reinforced epoxy pipe materials pressurized internally seem lacking. In this study, numerical analysis was carried out for three different stacking plies of composite hybrid natural fiber ±55o basalt and Eglass fiber reinforced epoxy tube which was tested under the subjection for three modes of applied load, the hoop and longitudinal tensile tested as well as subjection under biaxial internal pressures load in accordance to ASTM’s standard to investigate the mechanical behavior and the optimal configuration among them. Also, analyzed the comparable three types of hybrid natural fiber(basalt)/ Eglass reinforced epoxy with pure ±55o Eglass reinforced epoxy and pure ±55o basalt reinforced epoxy numerically to predict the performance for the hybrid over the pure E-glass and basalt fiber reinforced epoxy composite pipe as a good replacement to meet the different demand of applications in the pressure pipelines. Also The three stacking plies types of hybrid composite pipes were compared with the pure E-glass and basalt fiber reinforced epoxy pipes. All samples were fabricated using a dry filament wound CNC machine with ±55o orientation angle, then infused with epoxy resin using vacuum infusion procedure (VIP). Numerical analysis was carried out using finite element commercial code ANSYS V14.

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Mechanical Behavior of Composite Multilayered Basalt/E-Glass/Epoxy Pipe under Internal Pressure.

Journal Advanced Materials Research

publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMR.1125.227

Issue pp 227-234

Volume Vol. 1125 (2015)

Pressurized composite pipes made of concentric fiber reinforced polymer layers have found much interest among researchers. These composite pipes possess mechanical and thermal properties that exceed those of their constituent materials. This development is motivated by the demand for corrosion resistant, lighter and high specific stiffness components. Natural fiber composite materials retain better flexural stiffness and are environmentally friendly. Unlike experimental testing, numerical investigations on the manufacture and performance of natural fiber reinforced pipes under internal pressure seem lacking. In this analysis, the mechanical behavior of multilayer composite pipes made of natural basalt and E-glass fibers under internal pressure were carried out numerically. The multilayered composite pipes were fabricated by employing filament winding technique with, basalt and E-glass fibers, with fiber orientation angles of ±45O, ±55O, ±65O, ±75O. The matrix epoxy resin was infused using vacuum infusion process (VIP). A longitudinal and hoop tensile test rig, designed and fabricated according to ASTM D2105 and D2299 respectively, was used to determine the hoop and longitudinal properties of the pipes. Numerical simulations were conducted to determine the stress and strain behaviors with the intention to find the effect of ply angle, basalt and glass properties and also to evaluate the performance of the new natural basalt fiber as an alternative to E-glass/Epoxy

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Mechanical Behavior of Functionally Graded Sandwich Hollow Cylinders under Internal Pressure

Journal Advanced Materials Research

publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMR.845.360

Issue pp 360-366

Volume Vol. 845 (2014)

In this investigation, the mechanical behavior of sandwich hollow cylinders under internal pressure is carried out numerically. Functionally Graded (FG) foam core sandwich hollow cylinders are fabricated by employing filament winding technique with [±55] carbon fiber/epoxy as skins with the FG foam core made using centrifugal casting technique of polyurethane foam with epoxy resin. A finite element (FE) model is developed employing a FE commercial code to determine the stresses and deformations. Numerical analysis is performed to find the effect of one particular functional grading on the deformation and stresses. The results are compared with similar tubes using uniform PU foam core. The results show that grading the foam core affects the displacements and stresses in a significant way. The FG foam sandwich core tube possesses a lower displacement magnitude and higher maximum stresses taking into account the mass of the two types of pipes and rigidity compared to uniform PU foam core under internal pressure of 10 MPa.

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Static Analysis of Stitched Sandwich Beams with Functionally Graded Foam Core

Journal Applied Mechanics and Materials

publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMM.393.381

Issue pp 381-386

Volume Vol. 393 (2013)

In this paper static analysis of a cantilever functionally graded sandwich beam under uniform distributed loads is carried out numerically. The beam is composed of two glass fiber reinforced plastic (GFRP) facesheets and a graded Corecell A-series foam core. The composite skins and foam core are stitched together using the same glass fiber. A finite element (FE) model is developed employing a FE commercial code to determine the stresses and deflections. To find the effect of quality of foam gradation through the thickness of the core on the deflections and stresses numerical experiments are performed. Results revealed that the quality of gradation of the foam core affected the displacements and stresses significantly so that an optimal gradation of foam can minimize the deflection, stresses and weight of the sandwich beam.

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Impact Response of Laminated Composite Cylindrical Shell: Finite Element Simulation Approach

Journal Applied Mechanics and Materials

publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMM.393.387

Issue pp 387-392

Volume Vol. 393 (2013)

The effect of low velocity impact response on the thin laminated composite cylindrical shell with different stacking sequences was investigated. Finite element simulation using ABAQUS software was the base of the study during the analysis. The framework was to study the stress and displacement in radial and circumferential directions through finite element simulation. For simplicity, an arbitrarily picked circumferential path at where the impactor impacts the shell surface was selected. The graphs plotted based on stress and displacement variables Vs radial and circumferential directions did not show the significant changes for laminations with different stacking sequences. In addition, The 90 degree along circumferential and radial directions was found to be the critical point.

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Mechanical Behavior of Composite Multilayered Basalt/E-Glass/Epoxy Pipe under Internal Pressure

Publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMR.1125.227

Country Indonesia

Location Bali, Indonesia

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Mechanical Behavior of Functionally Graded Sandwich Hollow Cylinders under Internal Pressure

Publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMR.845.360

Country Malaysia

Location Johor Bahru, Malaysia

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Static Analysis of Stitched Sandwich Beams with Functionally Graded Foam Core

Publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMM.393.381

Country Malaysia

Location Malaca Malaysia

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Impact Response of Laminated Composite Cylindrical Shell: Finite Element Simulation Approach

Publisher Trans Tech Publications, Switzerland

DOI 10.4028/www.scientific.net/AMM.393.387

Country Malaysia

Location Malaca Malaysia

Visit Conference