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Journal Articles

Harnessing Hydrodynamic Cavitation for Surface Modification and Strengthening

Hao Pang, Gracious Ngaile
Journal: Journal of Micro and Nano-Manufacturing
Publisher: ASME
Article Type: Technical Briefs
J. Micro Nano-Manuf. September 2023, 11(3): 034501.
Paper No: JMNM-23-1060
https://doi.org/10.1115/1.4065332
Published Online: May 8, 2024
View Article titled, Harnessing Hydrodynamic Cavitation for Surface Modification and Strengthening
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Topics: Cavitation, Computational fluid dynamics
Proceedings Papers

Mechanical Performance Evaluation of the Printed Circuit Heat Exchanger Core Experiments Under Tension and Pressure Loading

Heramb P. Mahajan, Lucas Maciel, Gracious Ngaile, Tasnim Hassan
Proc. ASME. PVP2022, Volume 2: Computer Technology and Bolted Joints; Design and Analysis, V002T03A027, July 17–22, 2022
Publisher: American Society of Mechanical Engineers
Paper No: PVP2022-81247
https://doi.org/10.1115/PVP2022-81247
View Paper titled, Mechanical Performance Evaluation of the Printed Circuit Heat Exchanger Core Experiments Under Tension and Pressure Loading
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Topics: Circuits, Creep, Diffusion bonding (Metals), Equipment performance, Heat exchangers, Pressure, Tension, Temperature, Design, Stress
Journal Articles

Die Design Architecture for Enhancing Tool Life Via Manipulation of the Elastic Strain Field of the Dies During Extrusion Processes

Gracious Ngaile, Daniel Santiago Rodrigues
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. March 2021, 143(3): 031001.
Paper No: MANU-20-1065
https://doi.org/10.1115/1.4048265
Published Online: October 9, 2020
View Article titled, Die Design Architecture for Enhancing Tool Life Via Manipulation of the Elastic Strain Field of the Dies During Extrusion Processes
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Topics: Design, Extruding, Pressure, Stress, Tooling
Journal Articles

A Novel Hybrid Heating Method for Mechanical Testing of Miniature Specimens at Elevated Temperature

Lin Li, Gracious Ngaile, Tasnim Hassan
Journal: Journal of Micro and Nano-Manufacturing
Publisher: ASME
Article Type: Technical Briefs
J. Micro Nano-Manuf. June 2017, 5(2): 024501.
Paper No: JMNM-16-1045
https://doi.org/10.1115/1.4035954
Published Online: March 23, 2017
View Article titled, A Novel Hybrid Heating Method for Mechanical Testing of Miniature Specimens at Elevated Temperature
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Topics: Finite element analysis, Heating, Temperature, Temperature distribution
Proceedings Papers

A Novel Hybrid Heating Method for Elevated Temperature Mechanical Testing of Miniature Specimens

Lin Li, Gracious Ngaile, Tasnim Hassan
Proc. ASME. MSEC2016, Volume 1: Processing, V001T02A070, June 27–July 1, 2016
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2016-8852
https://doi.org/10.1115/MSEC2016-8852
View Paper titled, A Novel Hybrid Heating Method for Elevated Temperature Mechanical Testing of Miniature Specimens
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Topics: Heating, Mechanical testing, Temperature, Heat, Electrical resistance, Temperature distribution, Testing, Electric current, Engineering simulation, Finite element analysis
Proceedings Papers

Novel Extrusion Punch Design for Improved Lubrication and Punch Ejection

James Lowrie, Gracious Ngaile
Proc. ASME. MSEC2015, Volume 1: Processing, V001T02A103, June 8–12, 2015
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2015-9496
https://doi.org/10.1115/MSEC2015-9496
View Paper titled, Novel Extrusion Punch Design for Improved Lubrication and Punch Ejection
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Topics: Design, Extruding, Lubrication, Damage, Galling, Stress, Tooling, Finishes, Microchannels
Proceedings Papers

Enhancement of Tribological Performance via Innovative Tooling Design for Extrusion Processes

James B. Lowrie, Gracious Ngaile
Proc. ASME. MSEC2014, Volume 2: Processing, V002T02A087, June 9–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2014-4170
https://doi.org/10.1115/MSEC2014-4170
View Paper titled, Enhancement of Tribological Performance via Innovative Tooling Design for Extrusion Processes
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Topics: Design, Extruding, Tooling, Tribology, Friction, Lubricants, Coating processes, Coatings, High pressure (Physics), Stress
Journal Articles

New Micro Tube Hydroforming System Based on Floating Die Assembly Concept

Gracious Ngaile, James Lowrie
Journal: Journal of Micro and Nano-Manufacturing
Publisher: ASME
Article Type: Research-Article
J. Micro Nano-Manuf. December 2014, 2(4): 041004.
Paper No: JMNM-14-1036
https://doi.org/10.1115/1.4028320
Published Online: September 19, 2014
View Article titled, New Micro Tube Hydroforming System Based on Floating Die Assembly Concept
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Topics: Blanks, Design, Fluid pressure, Fluids, Junctions, Manufacturing, Pressure, Sealing (Process), Shapes, Cavities
Proceedings Papers

A Novel Hybrid Process for Drawing Operations

Kyle Pender, Gracious Ngaile
Proc. ASME. MSEC2013, Volume 1: Processing, V001T01A019, June 10–14, 2013
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2013-1253
https://doi.org/10.1115/MSEC2013-1253
View Paper titled, A Novel Hybrid Process for Drawing Operations
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Topics: Electron microscopy, Fluid pressure, Fluids, High pressure (Physics), Lubrication, Manufacturing, Stress
Journal Articles

Advances in Plastic Forming of Metals

Gracious Ngaile, Brad Kinsey
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Guest Editorial
J. Manuf. Sci. Eng. December 2011, 133(6): 060301.
https://doi.org/10.1115/1.4005461
Published Online: December 27, 2011
View Article titled, Advances in Plastic Forming of Metals
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Topics: Computer simulation, Deformation, Manufacturing, Metals, Numerical analysis, Plastics forming, Power presses, Tooling, Innovation, Materials characterization
Journal Articles

Real-Time Friction Error Compensation in Tube Hydroforming Process Control

Gracious Ngaile, Chen Yang, Obadiah Kilonzo
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. December 2011, 133(6): 061028.
https://doi.org/10.1115/1.4005430
Published Online: December 27, 2011
View Article titled, Real-Time Friction Error Compensation in Tube Hydroforming Process Control
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Topics: Error compensation, Friction, Errors, Process control, Shapes
Journal Articles

Preform Design for Tube Hydroforming Based on Wrinkle Formation

Chen Yang, Gracious Ngaile
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. December 2011, 133(6): 061014.
https://doi.org/10.1115/1.4005118
Published Online: December 9, 2011
View Article titled, Preform Design for Tube Hydroforming Based on Wrinkle Formation
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Topics: Compression, Design, Finite element analysis, Preforms, Pressure, Process design, Stress, Waves, Shapes, Cavities
Proceedings Papers

Real Time Friction Error Compensation in Tube Hydroforming Process Control

Gracious Ngaile, Obadiah Kilonzo, Chen Yang
Proc. ASME. MSEC2011, ASME 2011 International Manufacturing Science and Engineering Conference, Volume 1, 517-526, June 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2011-50165
https://doi.org/10.1115/MSEC2011-50165
View Paper titled, Real Time Friction Error Compensation in Tube Hydroforming Process Control
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Topics: Error compensation, Friction, Process control
Proceedings Papers

Database for Real-Time Loading Path Prediction for Tube Hydroforming Using Multidimensional Cubic Spline Interpolation

Angshuman Ghosh, Karan Deshmukh, Gracious Ngaile
Proc. ASME. MSEC2010, ASME 2010 International Manufacturing Science and Engineering Conference, Volume 1, 609-618, October 12–15, 2010
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2010-34099
https://doi.org/10.1115/MSEC2010-34099
View Paper titled, Database for Real-Time Loading Path Prediction for Tube Hydroforming Using Multidimensional Cubic Spline Interpolation
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Topics: Databases, Interpolation, Splines
Proceedings Papers

Preform Design for Forging Processes Based on Geometrical Resemblance

Chen Yang, Gracious Ngaile
Proc. ASME. MSEC2009, ASME 2009 International Manufacturing Science and Engineering Conference, Volume 1, 583-591, October 4–7, 2009
Publisher: American Society of Mechanical Engineers
Paper No: MSEC2009-84253
https://doi.org/10.1115/MSEC2009-84253
View Paper titled, Preform Design for Forging Processes Based on Geometrical Resemblance
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Topics: Design, Finite element analysis, Forging, Preforms, Simulation
Proceedings Papers

Analytical Model for the Characterization of the Guiding Zone Tribotest for Tube Hydroforming

Gracious Ngaile, Chen Yang
Proc. ASME. MSEC2008, ASME 2008 International Manufacturing Science and Engineering Conference, Volume 1, 591-600, October 7–10, 2008
Publisher: American Society of Mechanical Engineers
Paper No: MSEC_ICM&P2008-72250
https://doi.org/10.1115/MSEC_ICMP2008-72250
View Paper titled, Analytical Model for the Characterization of the Guiding Zone Tribotest for Tube Hydroforming
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Topics: Design, Failure, Finite element methods, Fracture (Materials), Fracture (Process), Friction, Hoop stress, Lubricants, Lubrication, Pressure
Journal Articles

Analytical Model for the Characterization of the Guiding Zone Tribotest for Tube Hydroforming

Gracious Ngaile, Chen Yang
Journal: Journal of Manufacturing Science and Engineering
Publisher: ASME
Article Type: Research Papers
J. Manuf. Sci. Eng. April 2009, 131(2): 021008.
https://doi.org/10.1115/1.3090888
Published Online: March 18, 2009
View Article titled, Analytical Model for the Characterization of the Guiding Zone Tribotest for Tube Hydroforming
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Topics: Friction, Pressure, Stress, Finite element analysis
Proceedings Papers

Enhancing Tribological Conditions in Tube Hydroforming by Using Textured Tubes

Gracious Ngaile, Mark Gariety, Taylan Altan
Proc. ASME. TRIB2004, ASME/STLE 2004 International Joint Tribology Conference, Parts A and B, 1579-1586, October 24–27, 2004
Publisher: American Society of Mechanical Engineers
Paper No: TRIB2004-64020
https://doi.org/10.1115/TRIB2004-64020
View Paper titled, Enhancing Tribological Conditions in Tube Hydroforming by Using Textured Tubes
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Topics: Tribology, Lubrication, Pressure, Sands, Deformation, Engineering simulation, Finite element analysis, Hydrostatics, Simulation, Surface texture
Proceedings Papers

Influence of Die Surface Texture on Tribological Performace for Tube Hydroforming

Gracious Ngaile, Angel Alvarado
Proc. ASME. WTC2005, World Tribology Congress III, Volume 2, 401-402, September 12–16, 2005
Publisher: American Society of Mechanical Engineers
Paper No: WTC2005-63688
https://doi.org/10.1115/WTC2005-63688
View Paper titled, Influence of Die Surface Texture on Tribological Performace for Tube Hydroforming
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Topics: Surface texture, Tribology, Industrial lubrication systems, Computer simulation, Design, Fluids, Lubricants, Metal stamping, Stiffness, Tooling
Journal Articles

Performance of Graphite and Boron-Nitride-Silicone Based Lubricants and Associated Lubrication Mechanisms in Warm Forging of Aluminum

Gracious Ngaile, Frank Botz
Journal: Journal of Tribology
Publisher: ASME
Article Type: Research Papers
J. Tribol. April 2008, 130(2): 021801.
https://doi.org/10.1115/1.2805432
Published Online: April 7, 2008
View Article titled, Performance of Graphite and Boron-Nitride-Silicone Based Lubricants and Associated Lubrication Mechanisms in Warm Forging of Aluminum
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Topics: Boron, Graphite, Lubricants, Lubrication, Silicones, Temperature, Forging, Friction