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Proceedings Papers

Forecasting High Cycle and Very High Cycle Fatigue Through Enhanced Strain-Energy Based Fatigue Life Prediction

Dino Celli, Luke Sheridan, Tommy George, Justin Warner, Lucas Smith
Proc. ASME. GT2024, Volume 10B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V10BT24A011, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-129455
https://doi.org/10.1115/GT2024-129455
View Paper titled, Forecasting High Cycle and Very High Cycle Fatigue Through Enhanced Strain-Energy Based Fatigue Life Prediction
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Topics: Cycles, Fatigue life, High cycle fatigue, Fatigue, Stress, Failure, Additive manufacturing, Fatigue testing, Servomechanisms, Bone
Proceedings Papers

Accelerated Structural Assessment for Risk Reduction of an AM Cruciform Rotor

Onome Scott-Emuakpor, Justin Warner, Dino Celli, Tommy George
Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101581
https://doi.org/10.1115/GT2023-101581
View Paper titled, Accelerated Structural Assessment for Risk Reduction of an AM Cruciform Rotor
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Topics: Additive manufacturing, Risk reduction, Rotors
Proceedings Papers

Investigating the Cause and Threat of Lack of Fusion in 316L Parts

Onome Scott-Emuakpor, Justin Warner, Dino Celi, Tommy George
Proc. ASME. GT2023, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V008T17A006, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-101582
https://doi.org/10.1115/GT2023-101582
View Paper titled, Investigating the Cause and Threat of Lack of Fusion in 316L Parts
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Topics: Additive manufacturing, Excitation, Fractography, Gas turbines, Geometry, Lasers, Risk, Root cause analysis, Rotors, Spin (Aerodynamics)
Proceedings Papers

Understanding the Role of Attractive Forces in Additively Manufactured Parts With Internal Particle Dampers

Daniel Kiracofe, Daniel Diaz, Matthew Postell, Dino Celli, John Hollkamp, Lorean Napper, Onome Scott-Emuakpor, Tommy George, Jr.
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT23A002, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102685
https://doi.org/10.1115/GT2023-102685
View Paper titled, Understanding the Role of Attractive Forces in Additively Manufactured Parts With Internal Particle Dampers
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Topics: Additive manufacturing, Dampers, Particulate matter, Excitation, Damping, Modeling, Weight (Mass), Aerospace industry, Design, Distributed power generation
Proceedings Papers

Damping and Fatigue Performance of Additive Manufactured Particle Damper Infused Instrumentation Rake

Dino A. Celli, Timothy Janczewski, Luke Sheridan, Onome Scott-Emuakpor, Justin Warner, Lucas Smith, John Hollkamp, Lorean Napper, Tommy George
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT23A007, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-103274
https://doi.org/10.1115/GT2023-103274
View Paper titled, Damping and Fatigue Performance of Additive Manufactured Particle Damper Infused Instrumentation Rake
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Topics: Additive manufacturing, Dampers, Damping, Fatigue, Instrumentation, Particulate matter, Excitation, Q-factor, Blades, Cavities
Proceedings Papers

Enhancing the Damping Capability of Rib-Stiffened Structures With Additive Manufacturing

Onome Scott-Emuakpor, Philip Johnson, Dino Celli, Tommy George
Proc. ASME. GT2023, Volume 11B: Structures and Dynamics — Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V11BT23A003, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102691
https://doi.org/10.1115/GT2023-102691
View Paper titled, Enhancing the Damping Capability of Rib-Stiffened Structures With Additive Manufacturing
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Topics: Additive manufacturing, Damping, Gas turbines
Journal Articles

Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V

Dino A. Celli, Onome Scott-Emuakpor, Justin Warner, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2023, 145(3): 031016.
Paper No: GTP-22-1476
https://doi.org/10.1115/1.4055726
Published Online: December 5, 2022
View Article titled, Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V
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Topics: Cycles, Design, Fatigue, Fatigue testing, Heating, High cycle fatigue, Stress, Titanium, Failure, Fatigue strength
Journal Articles

Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor

Justin Warner, Dino Celli, Onome Scott-Emuakpor, Tommy George, Trevor Tomlin
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2023, 145(3): 031008.
Paper No: GTP-22-1456
https://doi.org/10.1115/1.4055582
Published Online: December 5, 2022
View Article titled, Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor
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Topics: Compressors, Manufacturing, Modeling, Titanium alloys, Printing, Metals, Computerized tomography, Microscopes, Temperature, Particulate matter
Proceedings Papers

Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V

Dino A. Celli, Justin Warner, Onome Scott-Emuakpor, Tommy George
Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT24A010, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83443
https://doi.org/10.1115/GT2022-83443
View Paper titled, Investigation of Self-Heating During Ultrasonic Fatigue Testing and Effect on Very High Cycle Fatigue Behavior of Titanium 6Al-4V
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Topics: Fatigue testing, Heating, High cycle fatigue, Titanium, Cycles, Fatigue, Fatigue life, Heat, Gas turbines, Cooling
Proceedings Papers

Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor

Justin Warner, Dino Celli, Onome Scott-Emuakpor, Tommy George, Trevor Tomlin
Proc. ASME. GT2022, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Microturbines, Turbochargers, and Small Turbomachines; Oil & Gas Applications, V007T17A025, June 13–17, 2022
Publisher: American Society of Mechanical Engineers
Paper No: GT2022-83321
https://doi.org/10.1115/GT2022-83321
View Paper titled, Fused Deposition Modeling Fabrication Evaluation of a Ti-6Al-4V Centrifugal Compressor
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Topics: Compressors, Manufacturing, Modeling, Printing, Metals, Polymers, Steel, Aluminum, Shrinkage (Materials), Blades
Journal Articles

Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes

Onome Scott-Emuakpor, Luke Sheridan, Joseph Beck, Brian Runyon, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2021, 143(12): 121007.
Paper No: GTP-21-1344
https://doi.org/10.1115/1.4052061
Published Online: October 4, 2021
View Article titled, Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes
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Topics: Acceptance criteria, Fatigue, Maintenance, Wire, Cycles, Microscopy, Stress, Fractography
Proceedings Papers

Discrete Element Method Simulations of Additively Manufactured Components With Integrated Particle Dampers

Daniel Kiracofe, Matthew Postell, Onome Scott-Emuakpor, Brian Runyon, Tommy George, Jr.
Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT25A001, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-58462
https://doi.org/10.1115/GT2021-58462
View Paper titled, Discrete Element Method Simulations of Additively Manufactured Components With Integrated Particle Dampers
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Topics: Additive manufacturing, Dampers, Discrete element methods, Particulate matter, Simulation, Damping, Geometry, Vibration, Cantilever beams, Collisions (Physics)
Proceedings Papers

Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes

Onome Scott-Emuakpor, Luke Sheridan, Joseph Beck, Brian Runyon, Tommy George
Proc. ASME. GT2021, Volume 7: Industrial and Cogeneration; Manufacturing Materials and Metallurgy, V007T17A010, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59480
https://doi.org/10.1115/GT2021-59480
View Paper titled, Establishing an Acceptance Criteria for Assessing Fatigue of Additive Repair Processes
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Topics: Acceptance criteria, Additive manufacturing, Airfoils, Fatigue, Gas turbines, Maintenance, Titanium
Journal Articles

Vibration Fatigue Assessment of Additive Manufactured Nickel Alloy With Inherent Damping

Onome Scott-Emuakpor, Luke Sheridan, Brian Runyon, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2021, 143(10): 101009.
Paper No: GTP-20-1707
https://doi.org/10.1115/1.4051489
Published Online: September 3, 2021
View Article titled, Vibration Fatigue Assessment of Additive Manufactured Nickel Alloy With Inherent Damping
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Topics: Damping, Fatigue, Vibration, Additive manufacturing, Stress, Vibration suppression, Fatigue life
Journal Articles

Structural Dynamic and Inherent Damping Characterization of Additively Manufactured Airfoil Components

Andrew Goldin, Onome Scott-Emuakpor, Tommy George, Brian Runyon, Richard Cobb
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2021, 143(5): 051022.
Paper No: GTP-20-1743
https://doi.org/10.1115/1.4050022
Published Online: March 15, 2021
View Article titled, Structural Dynamic and Inherent Damping Characterization of Additively Manufactured Airfoil Components
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Topics: Additive manufacturing, Blades, Damping, Testing, Vibration, Structural dynamics, Inspection
Proceedings Papers

Structural Integrity Assessments for Validating Directed Energy Deposition Repairs of Integrally Bladed Rotor

Onome Scott-Emuakpor, Brian Runyon, Tommy George, Andrew Goldin, Casey Holycross, Luke Sheridan, Dino Celli, Bryan Langley, Daniel Gillaugh, Manigandan Kannan, Sulochana Shrestha, Andrew Gyekenyesi
Proc. ASME. GT2020, Volume 10B: Structures and Dynamics, V10BT27A006, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14361
https://doi.org/10.1115/GT2020-14361
View Paper titled, Structural Integrity Assessments for Validating Directed Energy Deposition Repairs of Integrally Bladed Rotor
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Topics: Maintenance, Rotors, Titanium
Proceedings Papers

Vibration Fatigue Assessment of Additive Manufactured Nickel Alloy With Inherent Damping

Onome Scott-Emuakpor, Luke Sheridan, Brian Runyon, Tommy George
Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T18A002, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14122
https://doi.org/10.1115/GT2020-14122
View Paper titled, Vibration Fatigue Assessment of Additive Manufactured Nickel Alloy With Inherent Damping
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Topics: Additive manufacturing, Damping, Fatigue, Nickel alloys, Vibration
Proceedings Papers

Structural Dynamic and Inherent Damping Characterization of Additively Manufactured Airfoil Components

Andrew Goldin, Onome Scott-Emuakpor, Tommy George, Brian Runyon, Richard Cobb
Proc. ASME. GT2020, Volume 11: Structures and Dynamics: Structural Mechanics, Vibration, and Damping; Supercritical CO2, V011T30A018, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14922
https://doi.org/10.1115/GT2020-14922
View Paper titled, Structural Dynamic and Inherent Damping Characterization of Additively Manufactured Airfoil Components
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Topics: Additive manufacturing, Airfoils, Damping, Structural dynamics, Vibration
Journal Articles

Stochastic Fatigue Life Prediction Based on a Reduced Data Set

Dino Celli, M.-H. Herman Shen, Onome Scott-Emuakpor, Casey Holycross, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2020, 142(3): 031017.
Paper No: GTP-19-1442
https://doi.org/10.1115/1.4045065
Published Online: February 3, 2020
View Article titled, Stochastic Fatigue Life Prediction Based on a Reduced Data Set
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Topics: Cycles, Failure, Fatigue, Fatigue life, Stress, High cycle fatigue, Weibull distribution
Journal Articles

Assessing Additive Manufacturing Repeatability of Inherently Damped Nickel Alloy Components

Onome Scott-Emuakpor, Tommy George, Brian Runyon, Casey Holycross, Luke Sheridan, Ryan O'Hara
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2020, 142(3): 031011.
Paper No: GTP-19-1316
https://doi.org/10.1115/1.4044314
Published Online: January 29, 2020
View Article titled, Assessing Additive Manufacturing Repeatability of Inherently Damped Nickel Alloy Components
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Topics: Damping, Manufacturing, Additive manufacturing, Nickel alloys