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Journal Articles

The Effect of Temperature on Puncture Resistance of Glass Cloth Reinforced Polyester Composites

Saad R. Ahmed, Sanjeev Khanna
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. July 2019, 141(3): 031006.
Paper No: MATS-18-1145
https://doi.org/10.1115/1.4042745
Published Online: March 11, 2019
View Article titled, The Effect of Temperature on Puncture Resistance of Glass Cloth Reinforced Polyester Composites
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Journal Articles

Finite Element Modeling of Sliding Wear in a Composite Alloy Using a Free-Mesh

M. A. Ashraf, R. Ahmed, O. Ali, N. H. Faisal, A. M. El-Sherik, M. F. A. Goosen
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research-Article
J. Tribol. July 2015, 137(3): 031605.
Paper No: TRIB-14-1184
https://doi.org/10.1115/1.4029998
Published Online: July 1, 2015
View Article titled, Finite Element Modeling of Sliding Wear in a Composite Alloy Using a Free-Mesh
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Topics: Finite element analysis, Wear, Alloys, Modeling
Journal Articles

Fatigue at Nanoscale: An Integrated Stiffness and Depth Sensing Approach to Investigate the Mechanisms of Failure in Diamondlike Carbon Film

R. Ahmed, Y. Q. Fu, N. H. Faisal
Journal: Journal of Tribology
Publisher: ASME
Article Type: Micro-Nano Tribology
J. Tribol. January 2012, 134(1): 012001.
https://doi.org/10.1115/1.4005774
Published Online: February 24, 2012
View Article titled, Fatigue at Nanoscale: An Integrated Stiffness and Depth Sensing Approach to Investigate the Mechanisms of Failure in Diamondlike Carbon Film
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Topics: Cycles, Failure, Fatigue, Stiffness, Stress, Nanoscale phenomena, Diamond films, Failure mechanisms
Proceedings Papers

Jet Shear Layer Size and Number Influences on Grid Plate Direct Fuel Injection Shear Layer Mixing Low NOx Gas Turbine Combustion With Fuel Staging for Power Turn Down

Gordon E. Andrews, S. A. R. Ahmed
Proc. ASME. GT2008, Volume 3: Combustion, Fuels and Emissions, Parts A and B, 291-298, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50408
https://doi.org/10.1115/GT2008-50408
View Paper titled, Jet Shear Layer Size and Number Influences on Grid Plate Direct Fuel Injection Shear Layer Mixing Low NOx Gas Turbine Combustion With Fuel Staging for Power Turn Down
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Topics: Combustion, Fuels, Gas turbines, Nitrogen oxides, Shear (Mechanics), Combustion chambers, Emissions, Design, Flames, Jets
Proceedings Papers

Dispensing Picoliter Droplets Using DEP Micro-Actuation

R. Ahmed, D. Hsu, C. Bailey, T. B. Jones
Proc. ASME. ICMM2003, 1st International Conference on Microchannels and Minichannels, 837-843, April 24–25, 2003
Publisher: American Society of Mechanical Engineers
Paper No: ICMM2003-1110
https://doi.org/10.1115/ICMM2003-1110
View Paper titled, Dispensing Picoliter Droplets Using DEP Micro-Actuation
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Topics: Drops, Electrodes, Wavelength, Electric fields, Hydrodynamic stability, Microfluidics, Strips, Water
Proceedings Papers

Experimental Investigation of the Effect of Camber on the Aerodynamic Characteristics of Airfoils in Ground Effect

M. R. Ahmed, G. M. Imran, S. D. Sharma
Proc. ASME. FEDSM2003, Volume 2: Symposia, Parts A, B, and C, 2133-2138, July 6–10, 2003
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2003-45573
https://doi.org/10.1115/FEDSM2003-45573
View Paper titled, Experimental Investigation of the Effect of Camber on the Aerodynamic Characteristics of Airfoils in Ground Effect
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Topics: Airfoils, Symmetry (Physics), Wakes, Flow (Dynamics), Pressure, Turbulence, Chords (Trusses), Clearances (Engineering), Diluents, Separation (Technology)
Journal Articles

Influence of Manufacturing Process and Alloying Element Content on the Tribomechanical Properties of Cobalt-Based Alloys

H. Yu, R. Ahmed, H. de Villiers Lovelock, S. Davies
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 2009, 131(1): 011601.
https://doi.org/10.1115/1.2991122
Published Online: December 4, 2008
View Article titled, Influence of Manufacturing Process and Alloying Element Content on the Tribomechanical Properties of Cobalt-Based Alloys
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Topics: Alloys, Wear, Fatigue, Cobalt alloys, Fracture toughness, Stress, Manufacturing, Disks
Proceedings Papers

A Comparison of the Tribo-Mechanical Properties of a Wear Resistant Cobalt-Based Alloy Produced by Different Manufacturing Processes

H. Yu, R. Ahmed, H. de Villiers Lovelock
Proc. ASME. IJTC2006, Part A: Tribomaterials; Lubricants and Additives; Elastohydrodynamic Lubrication; Hydrodynamic Lubrication and Fluid Film Bearings; Rolling Element Bearings; Engine Tribology; Machine Components Tribology; Contact Mechanics, 25-33, October 23–25, 2006
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2006-12156
https://doi.org/10.1115/IJTC2006-12156
View Paper titled, A Comparison of the Tribo-Mechanical Properties of a Wear Resistant Cobalt-Based Alloy Produced by Different Manufacturing Processes
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Topics: Cobalt alloys, Fatigue, Manufacturing, Wear
Proceedings Papers

Residual Strain Measurement in Thermal Spray Cermet Coatings via Neutron Diffraction

R. Ahmed, H. Yu, S. Stewart, L. Edwards, J. Santisteban
Proc. ASME. IJTC2006, Part B: Magnetic Storage Tribology; Manufacturing/Metalworking Tribology; Nanotribology; Engineered Surfaces; Biotribology; Emerging Technologies; Special Symposia on Contact Mechanics; Special Symposium on Nanotribology, 1153-1162, October 23–25, 2006
Publisher: American Society of Mechanical Engineers
Paper No: IJTC2006-12157
https://doi.org/10.1115/IJTC2006-12157
View Paper titled, Residual Strain Measurement in Thermal Spray Cermet Coatings via Neutron Diffraction
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Topics: Cermets, Coatings, Fatigue, Neutron diffraction, Sprays, Strain measurement, Stress
Journal Articles

Residual Strain Measurements in Thermal Spray Cermet Coatings via Neutron Diffraction

R. Ahmed, H. Yu, S. Stewart, L. Edwards, J. R. Santisteban
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2007, 129(2): 411–418.
https://doi.org/10.1115/1.2647503
Published Online: January 9, 2007
View Article titled, Residual Strain Measurements in Thermal Spray Cermet Coatings via Neutron Diffraction
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Topics: Coatings, Neutron diffraction, Sprays, Stress, Strain measurement, Coating processes, Fatigue
Journal Articles

A Comparison of the Tribo-Mechanical Properties of a Wear Resistant Cobalt-Based Alloy Produced by Different Manufacturing Processes

H. Yu, R. Ahmed, H. de Villiers Lovelock
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. July 2007, 129(3): 586–594.
https://doi.org/10.1115/1.2736450
Published Online: January 9, 2007
View Article titled, A Comparison of the Tribo-Mechanical Properties of a Wear Resistant Cobalt-Based Alloy Produced by Different Manufacturing Processes
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Topics: Alloys, Cobalt alloys, Fatigue, Wear, Wear testing, Wear resistance, Stress, Brittle fracture, Manufacturing
Journal Articles

Modeling of Micro-Pit Evolution in Rolling or Strip-Drawing

M. P. F. Sutcliffe, H. R. Le, R. Ahmed
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. October 2001, 123(4): 791–798.
https://doi.org/10.1115/1.1352741
Published Online: December 7, 2000
View Article titled, Modeling of Micro-Pit Evolution in Rolling or Strip-Drawing
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Topics: Film thickness, Lubrication, Strips, Surface roughness, Pressure, Modeling, Lubricants, Yield stress
Journal Articles

An Experimental Investigation of Surface Pit Evolution During Cold-Rolling or Drawing of Stainless Steel Strip

R. Ahmed, M. P. F. Sutcliffe
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Papers
J. Tribol. January 2001, 123(1): 1–7.
https://doi.org/10.1115/1.1327580
Published Online: June 29, 2000
View Article titled, An Experimental Investigation of Surface Pit Evolution During Cold-Rolling or Drawing of Stainless Steel Strip
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Topics: Lubrication, Strips, Surface roughness, Stainless steel, Lubricants
Journal Articles

A Sensitive Ultrasonic Approach to NDE of Tightly Closed Small Cracks

S. R. Ahmed, M. Saka
Journal: Journal of Pressure Vessel Technology
Publisher: ASME
Article Type: Research Papers
J. Pressure Vessel Technol. November 1998, 120(4): 384–392.
https://doi.org/10.1115/1.2842348
Published Online: November 1, 1998
View Article titled, A Sensitive Ultrasonic Approach to NDE of Tightly Closed Small Cracks
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Topics: Fracture (Materials), Nondestructive evaluation, Fatigue cracks, Longitudinal waves, Calibration, Computers, Inverse problems, Stress, Ultrasonic testing
Journal Articles

Influence of Base Slant on the Wake Structure and Drag of Road Vehicles

S. R. Ahmed
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. December 1983, 105(4): 429–434.
https://doi.org/10.1115/1.3241024
Published Online: December 1, 1983
View Article titled, Influence of Base Slant on the Wake Structure and Drag of Road Vehicles
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Topics: Drag (Fluid dynamics), Motor vehicles, Wakes, Automobiles, Flow visualization, Kinetic energy, Pressure, Pressure measurement, Reynolds number, Vortex motion
Journal Articles

Wake Structure of Typical Automobile Shapes

S. R. Ahmed
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. March 1981, 103(1): 162–169.
https://doi.org/10.1115/1.3240767
Published Online: March 1, 1981
View Article titled, Wake Structure of Typical Automobile Shapes
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Topics: Automobiles, Shapes, Wakes, Vehicles, Vortices, Bubbles, Dimensions, Drag (Fluid dynamics), Flow (Dynamics), Flow visualization