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Raphael T. Haftka
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Journal Articles

Uncertainty Reduction for Model Error Detection in Multiphase Shock Tube Simulation

Chanyoung Park, Samaun Nili, Justin T. Mathew, Frederick Ouellet, Rahul Koneru, Nam H. Kim, Sivaramakrishnan Balachandar, Raphael T. Haftka
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. September 2021, 6(3): 031004.
Paper No: VVUQ-19-1027
https://doi.org/10.1115/1.4051407
Published Online: July 6, 2021
View Article titled, Uncertainty Reduction for Model Error Detection in Multiphase Shock Tube Simulation
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Topics: Errors, Particulate matter, Shock tubes, Simulation, Uncertainty, Uncertainty quantification
Proceedings Papers

Comparison of Probabilistic and Possibility Theory-Based Methods for Design Against Catastrophic Failure Under Uncertainty

Efstratios Nikolaidis, Harley Cudney, Sophie Chen, Raphael T. Haftka, Raluca Rosca
Proc. ASME. DETC99, Volume 3: 11th International Conference on Design Theory and Methodology, 163-174, September 12–16, 1999
Publisher: American Society of Mechanical Engineers
Paper No: DETC99/DTM-8758
https://doi.org/10.1115/DETC99/DTM-8758
View Paper titled, Comparison of Probabilistic and Possibility Theory-Based Methods for Design Against Catastrophic Failure Under Uncertainty
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Topics: Design, Failure, Uncertainty, Probability, Failure mechanisms, Risk
Journal Articles

General-Surrogate Adaptive Sampling Using Interquartile Range for Design Space Exploration

Yiming Zhang, Nam H. Kim, Raphael T. Haftka
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. May 2020, 142(5): 051402.
Paper No: MD-19-1049
https://doi.org/10.1115/1.4044432
Published Online: November 20, 2019
View Article titled, General-Surrogate Adaptive Sampling Using Interquartile Range for Design Space Exploration
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Topics: Uncertainty, Design, Errors
Journal Articles

Early Time Evolution of Circumferential Perturbation of Initial Particle Volume Fraction in Explosive Cylindrical Multiphase Dispersion

M. Giselle Fernández-Godino, Frederick Ouellet, Raphael T. Haftka, S. Balachandar
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. September 2019, 141(9): 091302.
Paper No: FE-18-1733
https://doi.org/10.1115/1.4043055
Published Online: April 8, 2019
View Article titled, Early Time Evolution of Circumferential Perturbation of Initial Particle Volume Fraction in Explosive Cylindrical Multiphase Dispersion
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Topics: Particulate matter, Simulation
Journal Articles

A Kriging Surrogate Model for Computing Gas Mixture Equations of State

Frederick Ouellet, Chanyoung Park, Bertrand Rollin, Raphael T. Haftka, S. Balachandar
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. September 2019, 141(9): 091301.
Paper No: FE-18-1547
https://doi.org/10.1115/1.4042890
Published Online: March 25, 2019
View Article titled, A Kriging Surrogate Model for Computing Gas Mixture Equations of State
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Topics: Equations of state, Explosions, Pressure, Simulation, Temperature, Density, Errors, Explosives, Internal energy (Physics)
Journal Articles

Epistemic Uncertainty Stemming From Measurement Processing—A Case Study of Multiphase Shock Tube Experiments

Chanyoung Park, Justin Matthew, Nam H. Kim, Raphael T. Haftka
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. December 2018, 3(4): 041001.
Paper No: VVUQ-18-1018
https://doi.org/10.1115/1.4042814
Published Online: March 7, 2019
View Article titled, Epistemic Uncertainty Stemming From Measurement Processing—A Case Study of Multiphase Shock Tube Experiments
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Topics: Particulate matter, Uncertainty, X-rays, Image processing, Shock tubes, Uncertainty quantification, Calibration
Journal Articles

On the Use of Symmetries in Building Surrogate Models

M. Giselle Fernández-Godino, S. Balachandar, Raphael T. Haftka
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. June 2019, 141(6): 061402.
Paper No: MD-18-1359
https://doi.org/10.1115/1.4042047
Published Online: January 31, 2019
View Article titled, On the Use of Symmetries in Building Surrogate Models
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Topics: Approximation, Errors, Experimental design, Simulation
Proceedings Papers

Least Bumpiness Calibration With Extrapolative Bias Correction

Chanyoung Park, Nam H. Kim, Raphael T. Haftka
Proc. ASME. IDETC-CIE2018, Volume 2A: 44th Design Automation Conference, V02AT03A020, August 26–29, 2018
Publisher: American Society of Mechanical Engineers
Paper No: DETC2018-86163
https://doi.org/10.1115/DETC2018-86163
View Paper titled, Least Bumpiness Calibration With Extrapolative Bias Correction
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Topics: Calibration, Errors, Risk, Interpolation, Parameter estimation
Journal Articles

Function Prediction at One Inaccessible Point Using Converging Lines

Yiming Zhang, Chanyoung Park, Nam H. Kim, Raphael T. Haftka
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. May 2017, 139(5): 051402.
Paper No: MD-16-1568
https://doi.org/10.1115/1.4036130
Published Online: March 21, 2017
View Article titled, Function Prediction at One Inaccessible Point Using Converging Lines
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Topics: Approximation, Drag (Fluid dynamics), Interpolation, Uncertainty, Errors
Proceedings Papers

Investigation of the Effectiveness of Multi-Fidelity Surrogates on Extrapolation

Chanyoung Park, Raphael T. Haftka, Nam H. Kim
Proc. ASME. IDETC-CIE2016, Volume 2B: 42nd Design Automation Conference, V02BT03A057, August 21–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: DETC2016-60279
https://doi.org/10.1115/DETC2016-60279
View Paper titled, Investigation of the Effectiveness of Multi-Fidelity Surrogates on Extrapolation
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Topics: Algebra, Calibration, Errors, Fittings, Hull, Interpolation, Risk, Scalars, Simulation
Journal Articles

Deciding Degree of Conservativeness in Initial Design Considering Risk of Future Redesign

Nathaniel B. Price, Nam-Ho Kim, Raphael T. Haftka, Mathieu Balesdent, Sébastien Defoort, Rodolphe Le Riche
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. November 2016, 138(11): 111409.
Paper No: MD-16-1181
https://doi.org/10.1115/1.4034347
Published Online: September 12, 2016
View Article titled, Deciding Degree of Conservativeness in Initial Design Considering Risk of Future Redesign
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Topics: Design, Probability, Errors, Uncertainty, Failure
Journal Articles

Teaching a Verification and Validation Course Using Simulations and Experiments With Paper Helicopters

Chanyoung Park, Joo-Ho Choi, Raphael T. Haftka
Journal: Journal of Verification, Validation and Uncertainty Quantification
Publisher: ASME
Article Type: Research-Article
J. Verif. Valid. Uncert. September 2016, 1(3): 031002.
Paper No: VVUQ-14-1004
https://doi.org/10.1115/1.4033889
Published Online: July 15, 2016
View Article titled, Teaching a Verification and Validation Course Using Simulations and Experiments With Paper Helicopters
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Topics: Drag (Fluid dynamics), Helicopters, Students, Uncertainty, Calibration, Simulation
Proceedings Papers

Function Extrapolation at One Inaccessible Point Using Converging Lines

Yiming Zhang, Nam Ho Kim, Chanyoung Park, Raphael T. Haftka
Proc. ASME. IDETC-CIE2015, Volume 2B: 41st Design Automation Conference, V02BT03A027, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-47689
https://doi.org/10.1115/DETC2015-47689
View Paper titled, Function Extrapolation at One Inaccessible Point Using Converging Lines
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Topics: Drag (Fluid dynamics)
Proceedings Papers

Dynamic Simulation of Knee Motion Using Three-Dimensional Surrogate Contact Modeling

Yi-Chung Lin, Raphael T. Haftka, Nestor V. Queipo, Benjamin J. Fregly
Proc. ASME. SBC2008, ASME 2008 Summer Bioengineering Conference, Parts A and B, 177-178, June 25–29, 2008
Publisher: American Society of Mechanical Engineers
Paper No: SBC2008-190966
https://doi.org/10.1115/SBC2008-190966
View Paper titled, Dynamic Simulation of Knee Motion Using Three-Dimensional Surrogate Contact Modeling
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Topics: Contact modeling, Knee, Simulation, Computers, Cycles, Design, Optimization
Proceedings Papers

Reliability Based Design Optimization Considering Future Redesign With Different Epistemic Uncertainty Treatments

Taiki Matsumura, Raphael T. Haftka, Bhavani V. Sankar
Proc. ASME. IDETC-CIE2012, Volume 7: 9th International Conference on Design Education; 24th International Conference on Design Theory and Methodology, 805-814, August 12–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: DETC2012-70438
https://doi.org/10.1115/DETC2012-70438
View Paper titled, Reliability Based Design Optimization Considering Future Redesign With Different Epistemic Uncertainty Treatments
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Topics: Reliability-based optimization, Uncertainty, Design, Failure, Probability, Safety, Tradeoffs, Errors, Engineering systems and industry applications, Optimization
Journal Articles

Reliability Based Design Optimization Modeling Future Redesign With Different Epistemic Uncertainty Treatments

Taiki Matsumura, Raphael T. Haftka
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. September 2013, 135(9): 091006.
Paper No: MD-12-1616
https://doi.org/10.1115/1.4024726
Published Online: July 2, 2013
View Article titled, Reliability Based Design Optimization Modeling Future Redesign With Different Epistemic Uncertainty Treatments
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Topics: Design, Errors, Failure, Probability, Uncertainty, Safety
Proceedings Papers

Decomposition of System Level Reliability-Based Design Optimization to Reduce the Number of Simulations

Diane Villanueva, Rodolphe Le Riche, Gauthier Picard, Raphael T. Haftka, Bhavani V. Sankar
Proc. ASME. IDETC-CIE2011, Volume 5: 37th Design Automation Conference, Parts A and B, 117-126, August 28–31, 2011
Publisher: American Society of Mechanical Engineers
Paper No: DETC2011-47815
https://doi.org/10.1115/DETC2011-47815
View Paper titled, Decomposition of System Level Reliability-Based Design Optimization to Reduce the Number of Simulations
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Topics: Reliability-based optimization, Simulation, Reliability, Failure mechanisms, Risk, Safety
Proceedings Papers

Combining Separable Monte Carlo With Importance Sampling for Improved Accuracy

Anirban Chaudhuri, Raphael T. Haftka
Proc. ASME. IDETC-CIE2011, Volume 7: 5th International Conference on Micro- and Nanosystems; 8th International Conference on Design and Design Education; 21st Reliability, Stress Analysis, and Failure Prevention Conference, 927-932, August 28–31, 2011
Publisher: American Society of Mechanical Engineers
Paper No: DETC2011-48650
https://doi.org/10.1115/DETC2011-48650
View Paper titled, Combining Separable Monte Carlo With Importance Sampling for Improved Accuracy
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Topics: Chain, Composite materials, Crude oil, Dampers, Design, Errors, Failure, Particle filtering (numerical methods), Reliability, Sheet molding compound (Plastics)
Proceedings Papers

Equivalent Damage Growth Parameters Using a Simplified Model

Alexandra Coppe, Matthew J. Pais, Raphael T. Haftka, Nam H. Kim
Proc. ASME. IDETC-CIE2011, Volume 2: 31st Computers and Information in Engineering Conference, Parts A and B, 1317-1328, August 28–31, 2011
Publisher: American Society of Mechanical Engineers
Paper No: DETC2011-48801
https://doi.org/10.1115/DETC2011-48801
View Paper titled, Equivalent Damage Growth Parameters Using a Simplified Model
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Topics: Damage, Service life (Equipment), Structural health monitoring, Stress, Fracture (Materials), Errors, Finite element methods, Geometry, Random noise
Proceedings Papers

Making the Most Out of Surrogate Models: Tricks of the Trade

Felipe A. C. Viana, Christian Gogu, Raphael T. Haftka
Proc. ASME. IDETC-CIE2010, Volume 1: 36th Design Automation Conference, Parts A and B, 587-598, August 15–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: DETC2010-28813
https://doi.org/10.1115/DETC2010-28813
View Paper titled, Making the Most Out of Surrogate Models: Tricks of the Trade
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Topics: Computers, Design, Design automation, Modeling, Optimization, Space