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Proceedings Papers

Failure Modes and Rules Related to the Yield-to-Tensile Strength Ratio in Steel Structures

Wei Jun Wong, Carey L. Walters
Proc. ASME. OMAE2021, Volume 2: Structures, Safety, and Reliability, V002T02A041, June 21–30, 2021
Paper No: OMAE2021-61995
https://doi.org/10.1115/OMAE2021-61995
View Paper titled, Failure Modes and Rules Related to the Yield-to-Tensile Strength Ratio in Steel Structures
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Topics: Failure mechanisms, Steel, Ductility, High strength steel, Civil engineering, Design, Ductile fracture, Elongation, Fracture (Materials), Fracture (Process)
Proceedings Papers

State of the Art in Determination of Crack Direction in Shell Structures

Hossein Heidari, Carey L. Walters
Proc. ASME. OMAE2020, Volume 2A: Structures, Safety, and Reliability, V02AT02A010, August 3–7, 2020
Paper No: OMAE2020-18217
https://doi.org/10.1115/OMAE2020-18217
View Paper titled, State of the Art in Determination of Crack Direction in Shell Structures
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Topics: Fracture (Materials), Fracture (Process), Modeling, Necking, Shells
Proceedings Papers

Scaling of Pop-Ins During Brittle Fracture Testing

O. J. Coppejans, C. L. Walters
Proc. ASME. OMAE2019, Volume 4: Materials Technology, V004T03A032, June 9–14, 2019
Paper No: OMAE2019-95368
https://doi.org/10.1115/OMAE2019-95368
View Paper titled, Scaling of Pop-Ins During Brittle Fracture Testing
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Topics: Brittle fracture, Brittleness, Steel, Testing, Fracture toughness, Fracture (Materials), Displacement, Acceptance criteria, Offshore structures, Safety
Proceedings Papers

Recent Developments and Challenges of Cleavage Fracture Modelling in Steels: Aspects on Microstructural Mechanics and Local Approach Methods

Quanxin Jiang, V. M. Bertolo, V. A. Popovich, Carey L. Walters
Proc. ASME. OMAE2019, Volume 4: Materials Technology, V004T03A033, June 9–14, 2019
Paper No: OMAE2019-95464
https://doi.org/10.1115/OMAE2019-95464
View Paper titled, Recent Developments and Challenges of Cleavage Fracture Modelling in Steels: Aspects on Microstructural Mechanics and Local Approach Methods
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Topics: Fracture (Materials), Fracture (Process), Modeling, Steel, Fracture toughness, Micromechanical devices, Brittleness, Low temperature, Ocean engineering, Structural steel
Proceedings Papers

Comparison of Methods to Find the Weibull Stress Parameters

O. J. Coppejans, C. L. Walters
Proc. ASME. OMAE2018, Volume 3: Structures, Safety, and Reliability, V003T02A023, June 17–22, 2018
Paper No: OMAE2018-77038
https://doi.org/10.1115/OMAE2018-77038
View Paper titled, Comparison of Methods to Find the Weibull Stress Parameters
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Topics: Stress, Fracture (Materials), Fracture (Process), Probability, Structural analysis, Temperature
Journal Articles

Irradiation Issues and Material Selection for Canadian SCWR Components

L. Walters, M. Wright, D. Guzonas
Journal: Journal of Nuclear Engineering and Radiation Science
Article Type: Research-Article
ASME J of Nuclear Rad Sci. July 2018, 4(3): 031005.
Paper No: NERS-17-1045
https://doi.org/10.1115/1.4038367
Published Online: May 16, 2018
View Article titled, Irradiation Issues and Material Selection for Canadian SCWR Components
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Topics: Alloys, Irradiation (Radiation exposure), Supercritical water reactors, Temperature, Neutrons, Fuels, Water, Stainless steel, Helium
Proceedings Papers

Determination of Parameters for the Damage Mechanics Approach to Ductile Fracture Based on a Single Fracture Mechanics Test

O. J. Coppejans, C. L. Walters
Proc. ASME. OMAE2017, Volume 4: Materials Technology, V004T03A022, June 25–30, 2017
Paper No: OMAE2017-61425
https://doi.org/10.1115/OMAE2017-61425
View Paper titled, Determination of Parameters for the Damage Mechanics Approach to Ductile Fracture Based on a Single Fracture Mechanics Test
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Topics: Damage mechanics, Ductile fracture, Fracture mechanics, Failure, Fracture (Materials), Displacement, Stress, Finite element analysis, Iterative methods, Modeling
Proceedings Papers

Fracture Testing of Existing Structures Without the Need for Repairs

C. L. Walters, M. Bruchhausen, J.-M. Lapetite, W. Duvalois
Proc. ASME. OMAE2017, Volume 4: Materials Technology, V004T03A027, June 25–30, 2017
Paper No: OMAE2017-61420
https://doi.org/10.1115/OMAE2017-61420
View Paper titled, Fracture Testing of Existing Structures Without the Need for Repairs
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Topics: Fracture (Materials), Maintenance, Testing, Brittleness, Steel, Fracture toughness, Displacement, Nuclear industry, Ocean engineering, Service life (Equipment)
Proceedings Papers

Wrinkling, Fracture, and Necking: The Various Failure Modes in Maritime Crash

B. Atli-Veltin, R. Dekker, S. K. Brunner, C. L. Walters
Proc. ASME. OMAE2016, Volume 3: Structures, Safety and Reliability, V003T02A005, June 19–24, 2016
Paper No: OMAE2016-54148
https://doi.org/10.1115/OMAE2016-54148
View Paper titled, Wrinkling, Fracture, and Necking: The Various Failure Modes in Maritime Crash
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Topics: Failure mechanisms, Fracture (Materials), Fracture (Process), Necking, Stress, Buckling, Collisions (Physics), Failure, Resolution (Optics), Separation (Technology)
Proceedings Papers

Calculation of Shell Element Failure Based on the State of Stress Inside of a Neck

R. C. Dragt, J. Kraus, C. L. Walters
Proc. ASME. OMAE2015, Volume 3: Structures, Safety and Reliability, V003T02A009, May 31–June 5, 2015
Paper No: OMAE2015-41384
https://doi.org/10.1115/OMAE2015-41384
View Paper titled, Calculation of Shell Element Failure Based on the State of Stress Inside of a Neck
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Topics: Failure, Shells, Stress, Algorithms, Coulombs, Geometry, Offshore structures, Ships, Simulation, Thin wall structures
Proceedings Papers

Consequences of Using the Plane Stress Assumption for Damage Calculations in Crash Analyses

Carey L. Walters, Lars O. Voormeeren
Proc. ASME. OMAE2014, Volume 4B: Structures, Safety and Reliability, V04BT02A011, June 8–13, 2014
Paper No: OMAE2014-23946
https://doi.org/10.1115/OMAE2014-23946
View Paper titled, Consequences of Using the Plane Stress Assumption for Damage Calculations in Crash Analyses
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Topics: Damage, Stress, Failure, Shells, Dimensions, Ambiguity, Coulombs, Finite element model, Necking, Offshore structures
Proceedings Papers

Estimation of Failure Parameters for Finite Element Simulations Based on a Single State of Stress and Arbitrary Stress-Strain Relation

Lars O. Voormeeren, Carey L. Walters, Lisa Tang, Alex W. Vredeveldt
Proc. ASME. OMAE2014, Volume 5: Materials Technology; Petroleum Technology, V005T03A026, June 8–13, 2014
Paper No: OMAE2014-23900
https://doi.org/10.1115/OMAE2014-23900
View Paper titled, Estimation of Failure Parameters for Finite Element Simulations Based on a Single State of Stress and Arbitrary Stress-Strain Relation
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Topics: Engineering simulation, Failure, Finite element analysis, Simulation, Stress, Stress-strain relations, Ocean engineering, Ships, Storage tanks, Calibration
Proceedings Papers

Relating Structural Loading Rate to Testing Rate for Fracture Mechanics Specimens

Carey L. Walters, Jan Przydatek
Proc. ASME. OMAE2014, Volume 5: Materials Technology; Petroleum Technology, V005T03A028, June 8–13, 2014
Paper No: OMAE2014-23962
https://doi.org/10.1115/OMAE2014-23962
View Paper titled, Relating Structural Loading Rate to Testing Rate for Fracture Mechanics Specimens
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Topics: Fracture mechanics, Testing, Brittleness, Ocean engineering, Temperature, Fracture toughness, Phase transition temperature, Safety, Ships, Steel
Proceedings Papers

Minimum Fatigue Pre-Crack Extension for Fracture Testing

Carey L. Walters, Lars O. Voormeeren
Proc. ASME. PVP2013, Volume 6B: Materials and Fabrication, V06BT06A051, July 14–18, 2013
Paper No: PVP2013-97041
https://doi.org/10.1115/PVP2013-97041
View Paper titled, Minimum Fatigue Pre-Crack Extension for Fracture Testing
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Topics: Fatigue, Fracture (Materials), Testing, Steel, ASTM International, Finite element analysis
Proceedings Papers

The Use of Crosshead Displacement in Determining Fracture Parameters

Carey L. Walters, Lars O. Voormeeren, Michael Janssen
Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T03A015, June 9–14, 2013
Paper No: OMAE2013-10378
https://doi.org/10.1115/OMAE2013-10378
View Paper titled, The Use of Crosshead Displacement in Determining Fracture Parameters
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Topics: Displacement, Fracture (Materials), Fracture (Process), Fracture toughness, Steel, Errors, Fracture mechanics, Gages, Geometry, Machinery
Proceedings Papers

The Use of Surface Appearance in Combination With Charpy Impact Energy to Determine J-Integral Values

Carey L. Walters, Kim Wallin
Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T03A016, June 9–14, 2013
Paper No: OMAE2013-10379
https://doi.org/10.1115/OMAE2013-10379
View Paper titled, The Use of Surface Appearance in Combination With Charpy Impact Energy to Determine J-Integral Values
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Topics: Fracture (Materials), Fracture (Process), Fracture mechanics, Fracture toughness, Temperature
Proceedings Papers

Validation of the Acceptability of 10x20 mm Specimens for Fracture Toughness Determination of High-Strength Steels

Carey L. Walters, Lars O. Voormeeren, Michael Janssen, Kim Wallin
Proc. ASME. OMAE2013, Volume 3: Materials Technology; Ocean Space Utilization, V003T03A013, June 9–14, 2013
Paper No: OMAE2013-10373
https://doi.org/10.1115/OMAE2013-10373
View Paper titled, Validation of the Acceptability of 10x20 mm Specimens for Fracture Toughness Determination of High-Strength Steels
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Topics: Fracture toughness, Steel, Fracture (Materials), Fracture (Process), Size effect, Dimensions, Temperature
Proceedings Papers

Course Module on Precision Control of Piezoelectric Actuators

Hui-Ru Shih, Wilbur L. Walters
Proc. ASME. IMECE2012, Volume 5: Education and Globalization; General Topics, 15-23, November 9–15, 2012
Paper No: IMECE2012-85466
https://doi.org/10.1115/IMECE2012-85466
View Paper titled, Course Module on Precision Control of Piezoelectric Actuators
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Topics: Piezoelectric actuators, Students, Design, Piezoelectric materials, Undergraduate students, Energy consumption, Nanoscale devices
Proceedings Papers

Modeling, Control and Application of Piezoelectric Actuators

Hui-Ru Shih, Wilbur L. Walters
Proc. ASME. IMECE2010, Volume 6: Engineering Education and Professional Development, 239-247, November 12–18, 2010
Paper No: IMECE2010-37183
https://doi.org/10.1115/IMECE2010-37183
View Paper titled, Modeling, Control and Application of Piezoelectric Actuators
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Topics: Modeling, Piezoelectric actuators, Nanotechnology, Students, Atomic force microscopy, Smart materials, Education, Engineering teachers, Feedback, Teaching
Proceedings Papers

Precision Control of Piezoelectric Actuators With an Inversion-Based Approach

Hui-Ru Shih, Wilbur L. Walters
Proc. ASME. IMECE2010, Volume 8: Dynamic Systems and Control, Parts A and B, 1067-1076, November 12–18, 2010
Paper No: IMECE2010-37444
https://doi.org/10.1115/IMECE2010-37444
View Paper titled, Precision Control of Piezoelectric Actuators With an Inversion-Based Approach
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Topics: Piezoelectric actuators, Cascades (Fluid dynamics), Computer software, Creep, Dynamics (Mechanics), Feedforward control, Uncertainty