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Proceedings Papers

In-Situ Study on Coaxing During Vibration-Based Bending Fatigue of Inconel 625 and 718

Onome Scott-Emuakpor, Jeremy Schwartz, Tommy George, Charles Cross, Casey Holycross, M. H. Herman Shen
Proc. ASME. GT2013, Volume 7A: Structures and Dynamics, V07AT27A003, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94233
https://doi.org/10.1115/GT2013-94233
View Paper titled, In-Situ Study on Coaxing During Vibration-Based Bending Fatigue of Inconel 625 and 718
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Topics: Fatigue, Vibration, Failure, Stress, Cycles, Fatigue life, High cycle fatigue, Aerospace industry, Design, Gas turbines
Journal Articles

Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6

Todd Letcher, M.-H. H. Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2014, 136(2): 022502.
Paper No: GTP-13-1150
https://doi.org/10.1115/1.4025497
Published Online: November 1, 2013
View Article titled, Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6
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Topics: Fatigue, Fatigue life, Stress, Testing, Cycles
Proceedings Papers

Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6

Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 225-233, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68911
https://doi.org/10.1115/GT2012-68911
View Paper titled, Strain Rate and Loading Waveform Effects on an Energy-Based Fatigue Life Prediction for AL6061-T6
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Topics: Fatigue life, Waves, Cycles, Fatigue, Stress, Tension, Testing
Proceedings Papers

An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method

John Wertz, Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 207-214, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68889
https://doi.org/10.1115/GT2012-68889
View Paper titled, An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method
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Topics: Fatigue, Temperature, Testing, Materials properties, Operating temperature
Journal Articles

A Comparison of Constitutive Equations for the Energy-Based Lifing Method

John Wertz, Casey Holycross, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. July 2013, 135(3): 031008.
Paper No: MATS-12-1225
https://doi.org/10.1115/1.4024116
Published Online: May 8, 2013
View Article titled, A Comparison of Constitutive Equations for the Energy-Based Lifing Method
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Topics: Constitutive equations, Cycles, Dynamic testing (Engineering), Dynamic testing (Materials), Endurance limit, Energy dissipation, Fatigue, Fatigue life, Stress, Temperature
Journal Articles

An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method

John Wertz, Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Gas Turbines: Structures And Dynamics
J. Eng. Gas Turbines Power. October 2012, 134(10): 102502.
https://doi.org/10.1115/1.4007121
Published Online: August 17, 2012
View Article titled, An Energy-Based Axial Isothermal-Mechanical Fatigue Lifing Method
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Topics: Fatigue, Stress, Temperature, Testing, Operating temperature
Proceedings Papers

An Energy Based Critical Fatigue Life Prediction Method

Todd Letcher, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 77-84, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45443
https://doi.org/10.1115/GT2011-45443
View Paper titled, An Energy Based Critical Fatigue Life Prediction Method
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Topics: Fatigue life, Density, Fatigue, Fracture (Materials), Fracture (Process), Cycles, ASTM International, Failure, Stress, Stress-strain curves
Proceedings Papers

An Energy-Based Axial Isothermal-Mechanical Lifing Procedure

John Wertz, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 29-36, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45261
https://doi.org/10.1115/GT2011-45261
View Paper titled, An Energy-Based Axial Isothermal-Mechanical Lifing Procedure
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Topics: Creep, Density, Fatigue, Fatigue life, Fracture (Materials), Fracture (Process), Materials properties, Operating temperature, Temperature, Testing
Proceedings Papers

The Effect of Heat Generation on Low Cycle Fatigue Life Prediction

Onome Scott-Emuakpor, Tommy George, Charles Cross, Todd Letcher, John Wertz, M.-H. Herman Shen
Proc. ASME. GT2011, Volume 6: Structures and Dynamics, Parts A and B, 1-9, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45043
https://doi.org/10.1115/GT2011-45043
View Paper titled, The Effect of Heat Generation on Low Cycle Fatigue Life Prediction
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Topics: Heat, Low cycle fatigue, Fatigue, Cycles, Failure, Fatigue life, Stress, Wedges, Acoustics, Compression
Proceedings Papers

Geometric Optimization of Crack Arresting Holes in an Operational Component

Onome Scott-Emuakpor, Tommy George, Charles Cross
Proc. ASME. IMECE2010, Volume 9: Mechanics of Solids, Structures and Fluids, 57-64, November 12–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2010-37050
https://doi.org/10.1115/IMECE2010-37050
View Paper titled, Geometric Optimization of Crack Arresting Holes in an Operational Component
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Topics: Fracture (Materials), Optimization, Drills (Tools), Design, Fatigue, Pins (Engineering), Stress, Damage, Damping, Fatigue testing
Journal Articles

An Energy-Based Axial Isothermal- Mechanical Fatigue Lifing Procedure

John Wertz, M.-H. Herman Shen, Onome Scott-Emuakpor, Tommy George, Charles Cross
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. February 2012, 134(2): 024502.
https://doi.org/10.1115/1.4004394
Published Online: December 14, 2011
View Article titled, An Energy-Based Axial Isothermal- Mechanical Fatigue Lifing Procedure
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Topics: Design, Fatigue, Fracture (Materials), Fracture (Process), Stress, Temperature, Testing, Creep, Fatigue testing, Density
Proceedings Papers

Validation of a Multi-Axial Fatigue Life Prediction Using Maximum Shear Experimental Results

Onome Scott-Emuakpor, Tommy George, Charles Cross, John Wertz, M.-H. Herman Shen
Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 521-527, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22547
https://doi.org/10.1115/GT2010-22547
View Paper titled, Validation of a Multi-Axial Fatigue Life Prediction Using Maximum Shear Experimental Results
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Topics: Fatigue life, Shear (Mechanics), Torsion, Fatigue, Stress, Cycles, Density, Shear stress
Proceedings Papers

An Energy-Based Experimental-Analytical Torsional Fatigue Life-Prediction Method

John N. Wertz, M.-H. Herman Shen, Tommy George, Charles Cross, Onome Scott-Emuakpor
Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 529-537, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-22647
https://doi.org/10.1115/GT2010-22647
View Paper titled, An Energy-Based Experimental-Analytical Torsional Fatigue Life-Prediction Method
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Topics: Fatigue, Fatigue life, Shear (Mechanics), Cycles, Density, Fatigue testing, Fracture (Materials), Fracture (Process), Gas turbines, Materials properties
Proceedings Papers

The Use of Strain Energy and Fracture Correlation to Determine Life Expectancy for Notched Components

Onome Scott-Emuakpor, Tommy George, Charles Cross, M.-H. Herman Shen
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 175-183, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59288
https://doi.org/10.1115/GT2009-59288
View Paper titled, The Use of Strain Energy and Fracture Correlation to Determine Life Expectancy for Notched Components
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Topics: Fracture (Materials), Fracture (Process), Fatigue life, Stress, Density, Fatigue, Stress concentration, Aluminum, Compression, Cycles
Proceedings Papers

An Energy-Based Method for Uni-Axial Fatigue Life Calculation

Hakan Ozaltun, Jeremy Seidt, M.-H. Herman Shen, Tommy George, Charles Cross
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 195-202, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59512
https://doi.org/10.1115/GT2009-59512
View Paper titled, An Energy-Based Method for Uni-Axial Fatigue Life Calculation
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Topics: Fatigue life, Gas turbines, Aluminum, Approximation, Cycles, Energy dissipation, Fatigue strength, Fracture (Materials), Fracture (Process), Materials properties
Proceedings Papers

A New Energy-Based Multiaxial Fatigue Life Prediction Procedure

Wasim Tarar, Onome Scott-Emuakpor, M.-H. Herman Shen, Tommy George, Charles Cross
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 215-223, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-51170
https://doi.org/10.1115/GT2008-51170
View Paper titled, A New Energy-Based Multiaxial Fatigue Life Prediction Procedure
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Topics: Fatigue life, Cycles, Stress, Finite element analysis, Failure, Constitutive equations, Fatigue, Aluminum, Fracture (Materials), Fracture (Process)
Proceedings Papers

An Energy-Based Method for Multi-Axial Fatigue Life Calculation

Onome Scott-Emuakpor, M.-H. Herman Shen, Tommy George, Charles Cross
Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 379-392, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27425
https://doi.org/10.1115/GT2007-27425
View Paper titled, An Energy-Based Method for Multi-Axial Fatigue Life Calculation
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Topics: Fatigue life, Shear (Mechanics), Aluminum, Constitutive equations, Cycles, Fatigue, Fracture (Materials), Fracture (Process), Materials properties, Strength (Materials)
Proceedings Papers

A New Energy-Based Uniaxial Fatigue Life Prediction Method for a Gas Turbine Engine Material

Onome Scott-Emuakpor, M.-H. Herman Shen, Tommy George, Charles Cross, Jeffrey Calcaterra
Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 393-405, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27426
https://doi.org/10.1115/GT2007-27426
View Paper titled, A New Energy-Based Uniaxial Fatigue Life Prediction Method for a Gas Turbine Engine Material
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Topics: Fatigue life, Gas turbines, Stress, Aluminum, Approximation, Cycles, Endurance limit, Fatigue, Titanium
Proceedings Papers

Development of an Improved High Cycle Fatigue Criterion

Onome Scott-Emuakpor, M.-H. Herman Shen, Charles Cross, Jeffrey Calcaterra, Tommy George
Proc. ASME. GT2004, Volume 6: Turbo Expo 2004, 357-364, June 14–17, 2004
Publisher: American Society of Mechanical Engineers
Paper No: GT2004-53851
https://doi.org/10.1115/GT2004-53851
View Paper titled, Development of an Improved High Cycle Fatigue Criterion
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Topics: High cycle fatigue, Fatigue life, Fatigue, Cycles, Fatigue limit, Fatigue testing, Vibration, Aluminum, Bending (Stress), Compression
Proceedings Papers

A Promising New Energy-Based Fatigue Life Prediction Framework

Onome Scott-Emuakpor, M.-H. Herman Shen, Charles Cross, Jeffrey Calcaterra, Tommy George
Proc. ASME. GT2005, Volume 4: Turbo Expo 2005, 397-404, June 6–9, 2005
Publisher: American Society of Mechanical Engineers
Paper No: GT2005-68423
https://doi.org/10.1115/GT2005-68423
View Paper titled, A Promising New Energy-Based Fatigue Life Prediction Framework
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Topics: Fatigue life, Stress, Fatigue, Aluminum, Accounting, Bone, Cycles, Density, Fracture (Materials), Fracture (Process)