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Casey Holycross
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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
Journal Articles

Damage Accumulation in a Novel High-Throughput Technique to Characterize High Cycle Fatigue

Ryan B. Berke, Brandon A. Furman, Casey Holycross, Onome Scott-Emuakpor
Journal: Journal of Testing and Evaluation
Publisher: ASTM International
Article Type: Technical Papers
J. Test. Eval.. January 2021, 49(1): 297–312.
Paper No: JTE20190593
https://doi.org/10.1520/JTE20190593
Published Online: January 1, 2021
View Article titled, Damage Accumulation in a Novel High-Throughput Technique to Characterize High Cycle Fatigue
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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
Proceedings Papers

Assessing Manufacturing Repeatability of Inherently Damped Nickel Alloy Components via Forced-Response Testing

Onome Scott-Emuakpor, Tommy George, Brian Runyon, Luke Sheridan, Casey Holycross, Ryan O’Hara
Proc. ASME. GT2019, Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T24A010, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90945
https://doi.org/10.1115/GT2019-90945
View Paper titled, Assessing Manufacturing Repeatability of Inherently Damped Nickel Alloy Components via Forced-Response Testing
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Topics: Manufacturing, Nickel alloys, Testing, Damping, Geometry, Displacement, Shear (Mechanics), Additive manufacturing, Lasers
Journal Articles

Measurement of Hysteresis Energy Using Digital Image Correlation With Application to Energy-Based Fatigue Life Prediction

Dino Celli, M.-H. Herman Shen, Casey Holycross, Onome Scott-Emuakpor, Tommy George
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. September 2019, 141(9): 091018.
Paper No: GTP-18-1452
https://doi.org/10.1115/1.4044202
Published Online: July 22, 2019
View Article titled, Measurement of Hysteresis Energy Using Digital Image Correlation With Application to Energy-Based Fatigue Life Prediction
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Topics: Fatigue, Fatigue life, Strain measurement, Stress, Cycles, Damage, Energy dissipation, Gas turbines, Aluminum
Journal Articles

Investigating Discrepancies in Vibration Bending Fatigue Behavior of Additively Manufactured Titanium 6Al-4V

Onome Scott-Emuakpor, Casey Holycross, Tommy George, Luke Sheridan, Emily Carper, Joseph Beck
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. October 2019, 141(4): 041002.
Paper No: MATS-18-1208
https://doi.org/10.1115/1.4042955
Published Online: March 12, 2019
View Article titled, Investigating Discrepancies in Vibration Bending Fatigue Behavior of Additively Manufactured Titanium 6Al-4V
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Topics: Fatigue, Fracture (Materials), Stress, Titanium, Vibration, Additive manufacturing, Uncertainty, Fatigue life
Proceedings Papers

Investigating Damping Performance of Laser Powder Bed Fused Components With Unique Internal Structures

Onome Scott-Emuakpor, Tommy George, Brian Runyon, Casey Holycross, Bryan Langley, Luke Sheridan, Ryan O’Hara, Phil Johnson, Joseph Beck
Proc. ASME. GT2018, Volume 7C: Structures and Dynamics, V07CT35A020, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75977
https://doi.org/10.1115/GT2018-75977
View Paper titled, Investigating Damping Performance of Laser Powder Bed Fused Components With Unique Internal Structures
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Topics: Damping, Lasers, Vibration suppression, Additive manufacturing, Design, Geometry, Internal friction, Manufacturing, Optimization, Physics
Proceedings Papers

Investigating Discrepancies in Vibration Bending Fatigue Behavior of Additively Manufactured Titanium 6Al-4V

Onome Scott-Emuakpor, Casey Holycross, Tommy George, Luke Sheridan, Emily Carper, Joseph Beck
Proc. ASME. GT2018, Volume 6: Ceramics; Controls, Diagnostics, and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T24A015, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-75978
https://doi.org/10.1115/GT2018-75978
View Paper titled, Investigating Discrepancies in Vibration Bending Fatigue Behavior of Additively Manufactured Titanium 6Al-4V
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Topics: Additive manufacturing, Fatigue, Titanium, Vibration, Fatigue life, Stress, Uncertainty, Electromagnetic scattering, Density, Fracture (Materials)
Proceedings Papers

Measurement of Hysteresis Energy Using Digital Image Correlation With Application to Energy Based Fatigue Life Prediction

Dino Celli, M.-H. Herman Shen, Casey Holycross, Onome Scott-Emuakpor, Tommy George
Proc. ASME. GT2018, Volume 7A: Structures and Dynamics, V07AT31A017, June 11–15, 2018
Publisher: American Society of Mechanical Engineers
Paper No: GT2018-76973
https://doi.org/10.1115/GT2018-76973
View Paper titled, Measurement of Hysteresis Energy Using Digital Image Correlation With Application to Energy Based Fatigue Life Prediction
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Topics: Fatigue life, Fatigue, Energy dissipation, High cycle fatigue, Aluminum, Damage, Damage assessment, Experimental characterization, Fatigue damage, Gas turbines
Journal Articles

Application of Noninteraction Constitutive Models for Deformation of IN617 Under Combined Extreme Environments

Thomas Bouchenot, Calvin Cole, Ali P. Gordon, Casey Holycross, Ravi C. Penmetsa
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. October 2018, 140(4): 041008.
Paper No: MATS-17-1328
https://doi.org/10.1115/1.4040223
Published Online: June 18, 2018
View Article titled, Application of Noninteraction Constitutive Models for Deformation of IN617 Under Combined Extreme Environments
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Topics: Cathode ray oscilloscopes, Constitutive equations, Creep, Deformation, Fatigue, Hardening, Kinematics, Stress, Temperature, Engineering simulation
Proceedings Papers

As-Built Geometry and Surface Finish Effects on Fatigue and Tensile Properties of Laser Fused Titanium 6Al-4V

Onome Scott-Emuakpor, Tommy George, Emily Henry, Casey Holycross, Jeff Brown
Proc. ASME. GT2017, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T24A002, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63482
https://doi.org/10.1115/GT2017-63482
View Paper titled, As-Built Geometry and Surface Finish Effects on Fatigue and Tensile Properties of Laser Fused Titanium 6Al-4V
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Topics: Fatigue, Finishes, Geometry, Lasers, Tensile strength, Titanium, Additive manufacturing, Aerospace systems, Cooling, Ductility
Proceedings Papers

Regression Study on Variables Affecting Vibration Fatigue Behavior of Additive Manufactured Titanium 6Al-4V

Kyle Matissek, Onome Scott-Emuakpor, Tommy George, Casey Holycross, Thaddeus Crowe, Christopher Howard
Proc. ASME. GT2017, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy, V006T24A014, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-64049
https://doi.org/10.1115/GT2017-64049
View Paper titled, Regression Study on Variables Affecting Vibration Fatigue Behavior of Additive Manufactured Titanium 6Al-4V
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Topics: Additive manufacturing, Fatigue, Titanium, Vibration, Gas turbines, Stress, Surface roughness, Aerospace industry, Disasters, Fracture (Materials)
Proceedings Papers

Development of a Fatigue Damage and Lifing Assessment Method for Inconel 625 and Aluminum 6061-T6

Dino Celli, M.-H. Herman Shen, Tommy George, Onome Scott-Emuakpor, Casey Holycross
Proc. ASME. GT2017, Volume 7A: Structures and Dynamics, V07AT31A006, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63775
https://doi.org/10.1115/GT2017-63775
View Paper titled, Development of a Fatigue Damage and Lifing Assessment Method for Inconel 625 and Aluminum 6061-T6
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Topics: Aluminum, Fatigue damage, Fatigue, Stress, Fracture toughness, High cycle fatigue, Cycles, Damage, Fatigue failure, Fatigue life
Proceedings Papers

Fatigue Behavior Comparisons Between Ultrasonic and Servohydraulic Axial Testing Procedures

Onome Scott-Emuakpor, Tommy George, Casey Holycross, Jeffrey Brown, Joseph Beck
Proc. ASME. GT2016, Volume 7A: Structures and Dynamics, V07AT28A003, June 13–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: GT2016-56387
https://doi.org/10.1115/GT2016-56387
View Paper titled, Fatigue Behavior Comparisons Between Ultrasonic and Servohydraulic Axial Testing Procedures
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Topics: Fatigue, Testing, Aluminum, Cycles, Failure, High cycle fatigue, Alloys, Design, Fatigue cracks, Fatigue life
Journal Articles

Fatigue and Strength Studies of Titanium 6Al–4V Fabricated by Direct Metal Laser Sintering

Onome Scott-Emuakpor, Casey Holycross, Tommy George, Kevin Knapp, Joseph Beck
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2016, 138(2): 022101.
Paper No: GTP-15-1306
https://doi.org/10.1115/1.4031271
Published Online: September 1, 2015
View Article titled, Fatigue and Strength Studies of Titanium 6Al–4V Fabricated by Direct Metal Laser Sintering
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Topics: Fatigue, Lasers, Titanium, Gas turbines, Sintering, Metals, Vibration, Manufacturing, Stress
Proceedings Papers

Fatigue and Strength Studies of Titanium 6Al-4V Fabricated by Direct Metal Laser Sintering

Onome Scott-Emuakpor, Casey Holycross, Tommy George, Kevin Knapp, Jeffery Bruns
Proc. ASME. GT2015, Volume 6: Ceramics; Controls, Diagnostics and Instrumentation; Education; Manufacturing Materials and Metallurgy; Honors and Awards, V006T21A005, June 15–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: GT2015-42891
https://doi.org/10.1115/GT2015-42891
View Paper titled, Fatigue and Strength Studies of Titanium 6Al-4V Fabricated by Direct Metal Laser Sintering
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Topics: Fatigue, Lasers, Metals, Sintering, Titanium, Additive manufacturing, Fatigue life, Gas turbines, Manufacturing, Design
Proceedings Papers

Material Property Determination of Vibration Fatigued DMLS and Cold-Rolled Nickel Alloys

Onome Scott-Emuakpor, Tommy George, Joseph Beck, Jeremy Schwartz, Casey Holycross, M. H. Herman Shen, Joseph Slater
Proc. ASME. GT2014, Volume 7A: Structures and Dynamics, V07AT28A008, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-26247
https://doi.org/10.1115/GT2014-26247
View Paper titled, Material Property Determination of Vibration Fatigued DMLS and Cold-Rolled Nickel Alloys
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Topics: Materials properties, Nickel alloys, Vibration, Tensile strength, Alloys, Cycles, Fatigue, Sintering, Density, Displacement
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
Proceedings Papers

The Effect of Compressive Damage on Tensile Loading Failure of Titanium 6Al-4V

Onome Scott-Emuakpor, Tommy George, John Wertz, Casey Holycross
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 255-261, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-69079
https://doi.org/10.1115/GT2012-69079
View Paper titled, The Effect of Compressive Damage on Tensile Loading Failure of Titanium 6Al-4V
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Topics: Damage, Failure, Titanium, Fracture (Materials), Fracture (Process), Cycles, Compression, Data acquisition, Fatigue, Tension