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Proceedings Papers

Spectral Correlation Method for Fatigue Crack Detection Based on Nonlinearly Mixed Ultrasonic Waves

Santhakumar Sampath, Hoon Sohn
Proc. ASME. IMECE2021, Volume 4: Advances in Aerospace Technology, V004T04A019, November 1–5, 2021
Paper No: IMECE2021-68635
DOI: https://doi.org/10.1115/IMECE2021-68635
View Paper titled, Spectral Correlation Method for Fatigue Crack Detection Based on Nonlinearly Mixed Ultrasonic Waves
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Topics: Fatigue cracks, Ultrasonic waves, Waves
Proceedings Papers

Porosity Inspection in Metal Directed Energy Deposition Using Femtosecond Laser Based Transient Thermoreflectance Measurement

Peipei Liu, Kiyoon Yi, Hoon Sohn
Proc. ASME. QNDE2021, 2021 48th Annual Review of Progress in Quantitative Nondestructive Evaluation, V001T08A001, July 28–30, 2021
Paper No: QNDE2021-68491
DOI: https://doi.org/10.1115/QNDE2021-68491
View Paper titled, Porosity Inspection in Metal Directed Energy Deposition Using Femtosecond Laser Based Transient Thermoreflectance Measurement
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Topics: Inspection, Lasers, Metals, Porosity, Thermal diffusion, Thermoreflectance, Transients (Dynamics)
Proceedings Papers

Novelty Detection Using Auto-Associative Neural Network

Hoon Sohn, Keith Worden, Charles R. Farrar
Proc. ASME. IMECE2001, Dynamic Systems and Control, 573-580, November 11–16, 2001
Paper No: IMECE2001/DSC-24571
DOI: https://doi.org/10.1115/IMECE2001/DSC-24571
View Paper titled, Novelty Detection Using Auto-Associative Neural Network
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Topics: Artificial neural networks, Damage, Boundary-value problems, Temperature
Journal Articles

Estimation of Silicon Wafer Coating Thickness Using Ultrasound Generated by Femtosecond Laser

Peipei Liu, Kiyoon Yi, Hoon Sohn
Journal: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems
Article Type: Research Papers
ASME J Nondestructive Evaluation. February 2021, 4(1): 011005.
Paper No: NDE-20-1019
DOI: https://doi.org/10.1115/1.4047673
Published Online: July 28, 2020
View Article titled, Estimation of Silicon Wafer Coating Thickness Using Ultrasound Generated by Femtosecond Laser
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Topics: Coating processes, Coatings, Lasers, Semiconductor wafers, Ultrasonic measurement, Pumps
Journal Articles

Special Section on Selected Papers From the 7th Asia-Pacific Workshop on Structural Health Monitoring (APWSHM) 2018

Zhongqing Su, Shenfang Yuan, Hoon Sohn
Journal: Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems
Article Type: Guest Editorial
ASME J Nondestructive Evaluation. November 2019, 2(4): 040301.
Paper No: NDE-19-1047
DOI: https://doi.org/10.1115/1.4045009
Published Online: October 15, 2019
View Article titled, Special Section on Selected Papers From the 7th Asia-Pacific Workshop on Structural Health Monitoring (APWSHM) 2018
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Topics: Pacific Ocean, Structural health monitoring, Workshops (Work spaces)
Proceedings Papers

A Numerical Study on Characteristics of Swirl Premixed Flame Interaction Affecting NO Emission in a Gas Turbine Combustor

Junho Park, Cheon Hyeon Cho, Chae Hoon Sohn
Proc. ASME. GT2015, Volume 4A: Combustion, Fuels and Emissions, V04AT04A014, June 15–19, 2015
Paper No: GT2015-42157
DOI: https://doi.org/10.1115/GT2015-42157
View Paper titled, A Numerical Study on Characteristics of Swirl Premixed Flame Interaction Affecting NO Emission in a Gas Turbine Combustor
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Topics: Combustion chambers, Emissions, Flames, Gas turbines, Flow (Dynamics), Fuels, Methane, Nitrogen oxides, Numerical analysis, Steady state
Proceedings Papers

Effects of Burner Interaction on NOx Emission From Swirl Premix Burner in a Gas Turbine Combustor

Cheon Hyeon Cho, Chae Hoon Sohn, Ju Hyeong Cho, Han Seok Kim
Proc. ASME. GT2014, Volume 4B: Combustion, Fuels and Emissions, V04BT04A020, June 16–20, 2014
Paper No: GT2014-26174
DOI: https://doi.org/10.1115/GT2014-26174
View Paper titled, Effects of Burner Interaction on NOx Emission From Swirl Premix Burner in a Gas Turbine Combustor
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Topics: Combustion chambers, Emissions, Gas turbines, Nitrogen oxides, Flames, Flow (Dynamics), Fuels, Methane, Numerical analysis, Steady state
Proceedings Papers

Numerical Analysis of Combustion Instability and Its Suppression in Gas Turbine Combustor With Swirlers Modeled on EV Premix Burners

Chae Hoon Sohn, Han Chang Cho
Proc. ASME. GT2005, Volume 2: Turbo Expo 2005, 111-120, June 6–9, 2005
Paper No: GT2005-68162
DOI: https://doi.org/10.1115/GT2005-68162
View Paper titled, Numerical Analysis of Combustion Instability and Its Suppression in Gas Turbine Combustor With Swirlers Modeled on EV Premix Burners
Click here to open pdf in another window PDF for Numerical Analysis of Combustion Instability and Its Suppression in Gas Turbine Combustor With Swirlers Modeled on EV Premix Burners
Topics: Acoustics, Combustion, Combustion chambers, Gas turbines, Numerical analysis, Oscillations, Pressure, Flow (Dynamics), Chemically reactive flow, Combustion systems
Proceedings Papers

Application of Frequency Domain ARX Models and Extreme Value Statistics to Impedance-Based Damage Detection

Timothy R. Fasel, Hoon Sohn, Gyuhae Park, Charles R. Farrar
Proc. ASME. IMECE2003, Aerospace, 289-297, November 15–21, 2003
Paper No: IMECE2003-43178
DOI: https://doi.org/10.1115/IMECE2003-43178
View Paper titled, Application of Frequency Domain ARX Models and Extreme Value Statistics to Impedance-Based Damage Detection
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Topics: Damage, Statistics, Structural health monitoring, Actuators, Nonlinear systems, Sensors
Proceedings Papers

Damage Identification Using Impedance Methods Coupled With Statistical Classifiers

Gyuhae Park, Amanda C. Rutherford, Hoon Sohn, Charles R. Farrar
Proc. ASME. IMECE2003, Aerospace, 299-308, November 15–21, 2003
Paper No: IMECE2003-43179
DOI: https://doi.org/10.1115/IMECE2003-43179
View Paper titled, Damage Identification Using Impedance Methods Coupled With Statistical Classifiers
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Topics: Damage, Algorithms, Data mining, Degrees of freedom, Engineering systems and industry applications, Excitation, Pattern recognition, Piezoelectric materials, Sensors, Signals
Proceedings Papers

Reference-Free Transducer Self-Diagnosis Scheme Development

Sang Jun Lee, Hoon Sohn
Proc. ASME. IMECE2006, Materials, Nondestructive Evaluation, and Pressure Vessels and Piping, 675-684, November 5–10, 2006
Paper No: IMECE2006-14387
DOI: https://doi.org/10.1115/IMECE2006-14387
View Paper titled, Reference-Free Transducer Self-Diagnosis Scheme Development
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Topics: Transducers, Structural health monitoring, Aluminum, Cracking (Materials), Fracture (Process), Reliability, Semiconductor wafers, Signals
Journal Articles

Structural Damage Classification Using Extreme Value Statistics

Hoon Sohn, David W. Allen, Keith Worden, Charles R. Farrar
Journal: Journal of Dynamic Systems, Measurement, and Control
Article Type: Technical Papers
J. Dyn. Sys., Meas., Control. March 2005, 127(1): 125–132.
DOI: https://doi.org/10.1115/1.1849240
Published Online: May 10, 2005
View Article titled, Structural Damage Classification Using Extreme Value Statistics
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Topics: Damage, Statistics, Time series, Parameter estimation, Gaussian distribution, Springs
Journal Articles

Structural Health Monitoring Using Statistical Pattern Recognition Techniques

Hoon Sohn, Charles R. Farrar, Norman F. Hunter, Keith Worden
Journal: Journal of Dynamic Systems, Measurement, and Control
Article Type: Technical Papers
J. Dyn. Sys., Meas., Control. December 2001, 123(4): 706–711.
DOI: https://doi.org/10.1115/1.1410933
Published Online: February 7, 2001
View Article titled, Structural Health Monitoring Using Statistical Pattern Recognition Techniques
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Topics: Pattern recognition, Signals, Structural health monitoring, Time series, Patrol boats, Damage, Boats