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Journal Articles

Uncertainty Quantification in the Prediction of Remaining Useful Life Considering Multiple Failure Modes

Nazir Laureano Gandur, Stephen Ekwaro-Osire
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Research-Article
ASME J. Risk Uncertainty Part B. September 2025, 11(3): 031202.
Paper No: RISK-24-1052
https://doi.org/10.1115/1.4066722
Published Online: November 4, 2024
View Article titled, Uncertainty Quantification in the Prediction of Remaining Useful Life Considering Multiple Failure Modes
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Topics: Batteries, Bearings, Failure, Failure mechanisms, Uncertainty, Service life (Equipment), Uncertainty quantification, Reliability
Proceedings Papers

Uncertainty Quantification in the Prediction of Remaining Useful Life Considering Multiple Failure Modes

Nazir Laureano Gandur, Stephen Ekwaro-Osire
Proc. ASME. IMECE2023, Volume 13: Research Posters; Safety Engineering, Risk and Reliability Analysis, V013T15A021, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-114086
https://doi.org/10.1115/IMECE2023-114086
View Paper titled, Uncertainty Quantification in the Prediction of Remaining Useful Life Considering Multiple Failure Modes
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Topics: Artificial neural networks, Failure mechanisms, Service life (Equipment), Uncertainty, Uncertainty quantification
Proceedings Papers

A Deep Learning-Based Method for Early Crack Diagnosis in Non-Standard Spur Gear Pairs

Onur Can Kalay, Fatih Karpat, Esin Karpat, Ahmet Emir Dirik, Stephen Ekwaro-Osire
Proc. ASME. IMECE2023, Volume 13: Research Posters; Safety Engineering, Risk and Reliability Analysis, V013T15A020, October 29–November 2, 2023
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2023-113777
https://doi.org/10.1115/IMECE2023-113777
View Paper titled, A Deep Learning-Based Method for Early Crack Diagnosis in Non-Standard Spur Gear Pairs
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Topics: Fracture (Materials), Gears, Signals, Spur gears, Vibration, Stiffness, Aviation, Computation, Computer software, Design
Journal Articles

Verification and Validation of Rotating Machinery Using Digital Twin

Yasar Yanik, Stephen Ekwaro-Osire, João Paulo Dias, Edgard Haenisch Porto, Diogo Stuani Alves, Tiago Henrique Machado, Gregory Bregion Daniel, Helio Fiori de Castro, Katia Lucchesi Cavalca
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Research-Article
ASME J. Risk Uncertainty Part B. March 2024, 10(1): 011104.
Paper No: RISK-22-1072
https://doi.org/10.1115/1.4063892
Published Online: January 8, 2024
View Article titled, Verification and Validation of Rotating Machinery Using Digital Twin
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Topics: Bearings, Digital twin, Disks, Machinery, Rotors, Simulation, Computer simulation
Journal Articles

Incipient Fault Point Detection Based on Multiscale Diversity Entropy

Stephen Ekwaro-Osire, Nazir Laureano Gandur, Camilo Alberto Lopez-Salazar
Journal: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems
Publisher: ASME
Article Type: Technical Briefs
ASME J Nondestructive Evaluation. August 2023, 6(3): 034501.
Paper No: NDE-23-1002
https://doi.org/10.1115/1.4062622
Published Online: June 13, 2023
View Article titled, Incipient Fault Point Detection Based on Multiscale Diversity Entropy
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Topics: Batteries, Bearings, Entropy, Signals
Journal Articles

Mass Imbalance Diagnostics in Wind Turbines Using Deep Learning With Data Augmentation

Shweta Dabetwar, Stephen Ekwaro-Osire, João Paulo Dias, Guilherme R. Hübner, Claiton M. Franchi, Humberto Pinheiro
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Research-Article
ASME J. Risk Uncertainty Part B. March 2023, 9(1): 011201.
Paper No: RISK-21-1069
https://doi.org/10.1115/1.4054420
Published Online: June 2, 2022
View Article titled, Mass Imbalance Diagnostics in Wind Turbines Using Deep Learning With Data Augmentation
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Topics: Artificial neural networks, Data fusion, Rotors, Sensitivity analysis, Wind turbines, Time series, Wind velocity, Algorithms
Journal Articles

Prognostics and Health Management of Wind Energy Infrastructure Systems

Celalettin Yüce, Ozhan Gecgel, Oğuz Doğan, Shweta Dabetwar, Yasar Yanik, Onur Can Kalay, Esin Karpat, Fatih Karpat, Stephen Ekwaro-Osire
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Review Articles
ASME J. Risk Uncertainty Part B. June 2022, 8(2): 020801.
Paper No: RISK-21-1020
https://doi.org/10.1115/1.4053422
Published Online: February 16, 2022
View Article titled, Prognostics and Health Management of Wind Energy Infrastructure Systems
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Topics: Digital twin, Machine learning, Physics, Uncertainty, Wind energy, Algorithms, Errors
Proceedings Papers

Stress Analysis of Additive Manufactured Lightweight Spur Gears

Tufan Gürkan Yılmaz, Onur Can Kalay, Fatih Karpat, Stephen Ekwaro-Osire
Proc. ASME. IMECE2021, Volume 2A: Advanced Manufacturing, V02AT02A075, November 1–5, 2021
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2021-73666
https://doi.org/10.1115/IMECE2021-73666
View Paper titled, Stress Analysis of Additive Manufactured Lightweight Spur Gears
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Topics: Additive manufacturing, Gears, Spur gears, Stress analysis (Engineering)
Journal Articles

Deep Convolutional Neural Network Framework for Diagnostics of Planetary Gearboxes Under Dynamic Loading With Feature-Level Data Fusion

Ozhan Gecgel, Stephen Ekwaro-Osire, Utku Gulbulak, Tobias Souza Morais
Journal: Journal of Vibration and Acoustics
Publisher: ASME
Article Type: Research Papers
J. Vib. Acoust. June 2022, 144(3): 031003.
Paper No: VIB-21-1097
https://doi.org/10.1115/1.4052364
Published Online: October 6, 2021
View Article titled, Deep Convolutional Neural Network Framework for Diagnostics of Planetary Gearboxes Under Dynamic Loading With Feature-Level Data Fusion
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Topics: Artificial neural networks, Data fusion, Dynamic models, Finite element model, Fracture (Materials), Mechanical drives, Noise (Sound), Planetary gears, Stiffness, Gear teeth
Journal Articles

Fatigue Damage Diagnostics of Composites Using Data Fusion and Data Augmentation With Deep Neural Networks

Shweta Dabetwar, Stephen Ekwaro-Osire, João Paulo Dias
Journal: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems
Publisher: ASME
Article Type: Research Papers
ASME J Nondestructive Evaluation. May 2022, 5(2): 021004.
Paper No: NDE-21-1014
https://doi.org/10.1115/1.4051947
Published Online: August 23, 2021
View Article titled, Fatigue Damage Diagnostics of Composites Using Data Fusion and Data Augmentation With Deep Neural Networks
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Topics: Damage, Data fusion, Artificial neural networks, Composite materials
Journal Articles

Fabrication, Mechanics, and Reliability Analysis for Three-Dimensional Printed Lattice Designs

Nitin Nagesh Kulkarni, Stephen Ekwaro-Osire, Paul F. Egan
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Research-Article
ASME J. Risk Uncertainty Part B. March 2022, 8(1): 011107.
Paper No: RISK-21-1009
https://doi.org/10.1115/1.4051747
Published Online: August 13, 2021
View Article titled, Fabrication, Mechanics, and Reliability Analysis for Three-Dimensional Printed Lattice Designs
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Topics: Density, Design, Event history analysis, Manufacturing, Printing, Reliability, Yield stress, Additive manufacturing, Probability, Stress
Journal Articles

Uncertainty Quantification for Fatigue Life of Offshore Wind Turbine Structure

Abraham Nispel, Stephen Ekwaro-Osire, João Paulo Dias, Americo Cunha, Jr.
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Research-Article
ASME J. Risk Uncertainty Part B. December 2021, 7(4): 040901.
Paper No: RISK-20-1099
https://doi.org/10.1115/1.4051162
Published Online: July 12, 2021
View Article titled, Uncertainty Quantification for Fatigue Life of Offshore Wind Turbine Structure
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Topics: Fatigue life, Offshore wind turbines, Reliability, Uncertainty, Uncertainty quantification, Modeling, Sensitivity analysis, Fatigue, Probability, Physics
Proceedings Papers

Mechanical Testing and Reliability Analysis for 3D Printed Cubic Lattices

Nitin Nagesh Kulkarni, Stephen Ekwaro-Osire, Paul F. Egan
Proc. ASME. IMECE2020, Volume 14: Safety Engineering, Risk, and Reliability Analysis, V014T14A040, November 16–19, 2020
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2020-23694
https://doi.org/10.1115/IMECE2020-23694
View Paper titled, Mechanical Testing and Reliability Analysis for 3D Printed Cubic Lattices
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Topics: Additive manufacturing, Design, Event history analysis, Mechanical testing, Reliability
Journal Articles

Damage Classification of Composites Based on Analysis of Lamb Wave Signals Using Machine Learning

Shweta Dabetwar, Stephen Ekwaro-Osire, João Paulo Dias
Journal: ASCE-ASME J Risk and Uncert in Engrg Sys Part B Mech Engrg
Publisher: ASME
Article Type: Research-Article
ASME J. Risk Uncertainty Part B. March 2021, 7(1): 011002.
Paper No: RISK-20-1026
https://doi.org/10.1115/1.4048867
Published Online: January 22, 2021
View Article titled, Damage Classification of Composites Based on Analysis of Lamb Wave Signals Using Machine Learning
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Topics: Actuators, Damage, Sensors, Signals, Composite materials, Chaos, Machine learning, Cycles
Proceedings Papers

Uncertainty Quantification of Mass and Aerodynamic Rotor Imbalance for Offshore Wind Turbines

Nicholas J. Ward, Stephen Ekwaro-Osire, João Paulo Dias
Proc. ASME. GT2020, Volume 12: Wind Energy, V012T42A015, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15792
https://doi.org/10.1115/GT2020-15792
View Paper titled, Uncertainty Quantification of Mass and Aerodynamic Rotor Imbalance for Offshore Wind Turbines
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Topics: Offshore wind turbines, Rotors, Uncertainty quantification
Proceedings Papers

Probabilistic Analysis of the Fatigue Life of Offshore Wind Turbine Structures

Abraham Nispel, Stephen Ekwaro-Osire, João Paolo Dias
Proc. ASME. GT2020, Volume 12: Wind Energy, V012T42A004, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14742
https://doi.org/10.1115/GT2020-14742
View Paper titled, Probabilistic Analysis of the Fatigue Life of Offshore Wind Turbine Structures
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Topics: Fatigue life, Offshore wind turbines, Reliability, Uncertainty quantification
Proceedings Papers

Damage Detection of Composite Materials Using Data Fusion With Deep Neural Networks

Shweta Dabetwar, Stephen Ekwaro-Osire, João Paulo Dias
Proc. ASME. GT2020, Volume 10B: Structures and Dynamics, V10BT27A019, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-15097
https://doi.org/10.1115/GT2020-15097
View Paper titled, Damage Detection of Composite Materials Using Data Fusion With Deep Neural Networks
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Topics: Artificial neural networks, Composite materials, Damage, Data fusion
Journal Articles

Simulation-Driven Deep Learning Approach for Wear Diagnostics in Hydrodynamic Journal Bearings

Ozhan Gecgel, João Paulo Dias, Stephen Ekwaro-Osire, Diogo Stuani Alves, Tiago Henrique Machado, Gregory Bregion Daniel, Helio Fiori de Castro, Katia Lucchesi Cavalca
Journal: Journal of Tribology
Publisher: ASME
Article Type: Technical Briefs
J. Tribol. August 2021, 143(8): 084501.
Paper No: TRIB-20-1168
https://doi.org/10.1115/1.4049067
Published Online: November 20, 2020
View Article titled, Simulation-Driven Deep Learning Approach for Wear Diagnostics in Hydrodynamic Journal Bearings
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Topics: Bearings, Journal bearings, Wear, Algorithms, Signals
Journal Articles

Uncertainty Quantification With Sparsely Characterized Parameters: An Example Applied to Femoral Stem Mechanics

Godlove Wanki, Stephen Ekwaro-Osire, João Paulo Dias, Americo Cunha, Jr.
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. September 2020, 5(3): 031005.
Paper No: VVUQ-19-1030
https://doi.org/10.1115/1.4048749
Published Online: October 29, 2020
View Article titled, Uncertainty Quantification With Sparsely Characterized Parameters: An Example Applied to Femoral Stem Mechanics
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Topics: Displacement, Modeling, Porosity, Stiffness, Uncertainty, Uncertainty quantification, Young's modulus, Statistical distributions, Risk, Design
Journal Articles

Magnetic Resonance Image Based Computational Modeling for Anterior Cruciate Ligament Response at Low Knee Flexion Angle

Ariful I. Bhuiyan, Nabila Shamim, Stephen Ekwaro-Osire
Journal: Journal of Engineering and Science in Medical Diagnostics and Therapy
Publisher: ASME
Article Type: Research-Article
ASME J of Medical Diagnostics. February 2021, 4(1): 011001.
Paper No: JESMDT-20-1027
https://doi.org/10.1115/1.4048701
Published Online: October 28, 2020
View Article titled, Magnetic Resonance Image Based Computational Modeling for Anterior Cruciate Ligament Response at Low Knee Flexion Angle
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Topics: Anterior cruciate ligament, Knee, Modeling, Magnetic resonance