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153 results on '"Al-Ahmari, Abdulrahman M."'

5. Validations—Modeling and Optimization

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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6. Mathematical Modeling and Multi-objective Optimization

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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7. Conclusions and Future Work Recommendations

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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8. Dimensional Variations in DLBMM of Aerospace Alloys

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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9. Dry Laser Beam Micro-milling (DLBMM) of Aerospace Alloys

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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10. Research Methodology

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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11. Literature Review

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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12. Introduction

Author

Darwish, Saied Muhammed Hassan, Ahmed, Naveed, Al-Ahmari, Abdulrahman M., Öchsner, Andreas, Series editor, da Silva, Lucas F. M., Series editor, Altenbach, Holm, Series editor, Darwish, Saied Muhammed Hassan, editor, Ahmed, Naveed, editor, and Al-Ahmari, Abdulrahman M., editor

Published
2017
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41. Applications of Nanoparticles via Laser Ablation in Liquids: a review.

Author

Abdullah, Fawaz M., Al-Ahmari, Abdulrahman M., Darwish, Saied, and Rafaqat, Madiha

Subjects
NANOPARTICLES, LASER ablation, PARTICLE size distribution, DISTILLED water, MICROSTRUCTURE
Abstract

Laser ablation of any solid target in the liquid leads to fabricate nanoparticles (NPs) with metal or different compositions of materials such as metals, alloys, oxides, carbides, hydroxides. The fabrication of NPs in liquids based on laser ablation has grown up rapidly in the last decades compared to other techniques. Nowadays, laser ablation has been improved to prepare a different types of NPs with special morphologies, microstructures, phases and sizes, which can be applied in various field. The paper reviews and highlights the different sizes, shapes and application field of nanoparticles that are produced by laser ablation under different liquids and materials. Also the paper provide a case study for producing a titanium NPs produced by laser ablation submerged in distilled water. The Size of NPs is an important parameter especially for their usage and applications. The size and shape has been analyzed by SEM, (EDAX) was applied to evaluate the oxidation and elements of titanium NPs and the XRD was used to evaluate the phase composition and the peaks of both titanium and some element. SEM technique showed that the synthesized NPs size ranges were between 15-35 nm which can be applied in various field such as annihilator for cancerous cell etc. [ABSTRACT FROM AUTHOR]

Published
2019

49. STATE OF THE ART OF EX-SITU ALUMINIUM MATRIX COMPOSITE FABRICATION THROUGH FRICTION STIR PROCESSING.

Author

GANGIL, N., SIDDIQUEE, A. NOOR, MAHESHWARI, S., AL-AHMARI, ABDULRAHMAN M., and ABIDI, M. H.

Subjects
ALUMINUM alloys, FRICTION stir processing, METAL fabrication, METALLIC composites, TENSILE strength
Abstract

Aluminium metal matrix composites (AMMCs) are the fastest developing materials for structural applications. Friction Stir Processing (FSP) has evolved as a promising surface composite fabrication technique mainly because it is an eco-friendly and solid-state process. A spurt in the interest of research community and a resulting huge research output makes it difficult to find relevant information to further the research with objectivity. To facilitate this, the present article addresses the current state of the art and development in surface metal matrix fabrication through FSP with a specific focus on ex-situ routes. The available literature has been carefully read and categorized to present effects of particle size, morphology and elemental composition. The effect of various reinforcements on development of different functional characteristics is also discussed. Effect of main FSP parameters on various responses is presented with objectivity. Based on the studied literature concluding summary is presented in a manner in which the literature becomes useful to the researchers working on this important technology. [ABSTRACT FROM AUTHOR]

Published
2018
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50. Evaluation of Handheld Scanners for Automotive Applications.

Author

Ameen, Wadea, Al-Ahmari, Abdulrahman M., and Hammad Mian, Syed

Subjects
NEW product development, MANUFACTURING industries, DATA acquisition systems
Abstract

The process of generating a computerized geometric model for an existing part is known as Reverse Engineering (RE). It is a very useful technique in product development and plays a significant role in automotive, aerospace, and medical industries. In fact, it has been getting remarkable attention in manufacturing industries owing to its advanced data acquisition technologies. The process of RE is based on two primary steps: data acquisition (also known as scanning) and data processing. To facilitate point data acquisition, a variety of scanning systems is available with different capabilities and limitations. Although the optical control of 3D scanners is fully developed, still several factors can affect the quality of the scanned data. As a result, the proper selection of scanning parameters, such as resolution, laser power, shutter time, etc., becomes very crucial. This kind of investigation can be very helpful and provide its users with guidelines to identify the appropriate factors. Moreover, it is worth noting that no single system is ideal in all applications. Accordingly, this work has compared two portable (handheld) systems based on laser scanning and white light optical scanning for automotive applications. A car door containing a free-form surface has been used to achieve the above-mentioned goal. The design of experiments has been employed to determine the effects of different scanning parameters and optimize them. The capabilities and limitations have been identified by comparing the two scanners in terms of accuracy, scanning time, triangle numbers, ease of use, and portability. Then, the relationships between the system capabilities and the application requirements have been established. The results revealed that the laser scanner performed better than the white light scanner in terms of accuracy, while the white light scanner performed better in terms of acquisition speed and triangle numbers. [ABSTRACT FROM AUTHOR]

Published
2018
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