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Youssef Hammi
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Journal Articles

Surrogate Modeling of Brain Trauma Risks Associated With Soccer Ball Headers

Richard A. Perkins, Amirhamed Bakhtiarydavijani, Gehendra Sharma, Anand Nellippallil, Youssef Hammi, Thomas Robinson, Raj K. Prabhu
Journal: Journal of Engineering and Science in Medical Diagnostics and Therapy
Publisher: ASME
Article Type: Research-Article
ASME J of Medical Diagnostics. November 2025, 8(4): 041102.
Paper No: JESMDT-24-1012
https://doi.org/10.1115/1.4066476
Published Online: October 23, 2024
View Article titled, Surrogate Modeling of Brain Trauma Risks Associated With Soccer Ball Headers
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Topics: Traumatic brain injury, Wounds, Metamodeling, Simulation, Risk, Brain, Finite element analysis
Includes: Supplementary data
Proceedings Papers

Comparison of Ballistic Impact Simulations Using Different Constitutive Material Models of Concrete

Chris Duncan, Richard Allen Perkins, Daniel Johnson, Mei Chandler, Robert Moser, Jesse Sherburn, Youssef Hammi
Proc. ASME. IMECE2022, Volume 3: Advanced Materials: Design, Processing, Characterization and Applications; Advances in Aerospace Technology, V003T03A037, October 30–November 3, 2022
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2022-94248
https://doi.org/10.1115/IMECE2022-94248
View Paper titled, Comparison of Ballistic Impact Simulations Using Different Constitutive Material Models of Concrete
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Topics: Concretes, Simulation, Finite element analysis, Projectiles, Compression, Computer simulation, Damage, Defense industry, Energy transformation, High strength concrete
Journal Articles

A Dynamic Three Invariant Cap-Viscoplastic Damage Model for Ultrahigh-Performance Concrete

Bhasker Paliwal, Youssef Hammi, Mei Chandler, Robert D. Moser, Mark F. Horstemeyer
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. January 2020, 142(1): 011001.
Paper No: MATS-18-1342
https://doi.org/10.1115/1.4043705
Published Online: May 30, 2019
View Article titled, A Dynamic Three Invariant Cap-Viscoplastic Damage Model for Ultrahigh-Performance Concrete
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Topics: Compression, Concretes, Damage, Stress, Constitutive equations, Viscoplasticity, Plasticity
Proceedings Papers

Comparison of Johnson-Cook Model and an ISV Plasticity Damage Model in Penetration Simulation

Yangqing Dou, Yucheng Liu, Youssef Hammi
Proc. ASME. IMECE2016, Volume 9: Mechanics of Solids, Structures and Fluids; NDE, Diagnosis, and Prognosis, V009T12A022, November 11–17, 2016
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2016-68195
https://doi.org/10.1115/IMECE2016-68195
View Paper titled, Comparison of Johnson-Cook Model and an ISV Plasticity Damage Model in Penetration Simulation
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Topics: Damage, Plasticity, Simulation, Aluminum, Fracture (Materials), Mechanical behavior, Nucleation (Physics), Reliability, Simulation results
Journal Articles

Smooth Yield Surface Constitutive Modeling for Granular Materials

Youssef Hammi, Tonya W. Stone, Bhasker Paliwal, Mark F. Horstemeyer, Paul G. Allison
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research-Article
J. Eng. Mater. Technol. January 2017, 139(1): 011010.
Paper No: MATS-16-1181
https://doi.org/10.1115/1.4034987
Published Online: November 14, 2016
View Article titled, Smooth Yield Surface Constitutive Modeling for Granular Materials
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Topics: Compacting, Constitutive equations, Density, Failure, Granular materials, Hardening, Plasticity, Shear (Mechanics), Steel, Stress
Proceedings Papers

Computational Investigation of High Velocity Penetration of Copper Subjected to Impact From Nickel Projectiles

Yucheng Liu, Yangqing Dou, Youssef Hammi
Proc. ASME. IMECE2015, Volume 9: Mechanics of Solids, Structures and Fluids, V009T12A003, November 13–19, 2015
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2015-50241
https://doi.org/10.1115/IMECE2015-50241
View Paper titled, Computational Investigation of High Velocity Penetration of Copper Subjected to Impact From Nickel Projectiles
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Topics: Copper, Nickel, Projectiles, Equations, Shapes, Simulation, Stress
Journal Articles

Micromechanics Study of Fatigue Damage Incubation Following an Initial Overstrain

Yibin Xue, Amanda M. Wright, David L. McDowell, Mark F. Horstemeyer, Kiran Solanki, Youssef Hammi
Journal: Journal of Engineering Materials and Technology
Publisher: ASME
Article Type: Research Papers
J. Eng. Mater. Technol. April 2010, 132(2): 021010.
https://doi.org/10.1115/1.4000227
Published Online: February 19, 2010
View Article titled, Micromechanics Study of Fatigue Damage Incubation Following an Initial Overstrain
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Topics: Aluminum alloys, Cycles, Deformation, Fatigue, Fatigue cracks, Fatigue damage, Fracture (Materials), Intermetallic compounds, Micromechanics (Engineering), Particulate matter
Proceedings Papers

An Anisotropic Damage Model for Ductile Metals

Youssef Hammi, Mark F. Horstemeyer, Doug J. Bammann
Proc. ASME. IMECE2002, Materials: Processing, Characterization and Modeling of Novel Nano-Engineered and Surface Engineered Materials, 185-192, November 17–22, 2002
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2002-32887
https://doi.org/10.1115/IMECE2002-32887
View Paper titled, An Anisotropic Damage Model for Ductile Metals
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Topics: Anisotropy, Damage, Metals, Tensors, Nucleation (Physics), Aluminum alloys, Fracture (Materials), Plasticity, Fracture toughness, Hydrostatics
Proceedings Papers

Modeling of Anisotropic Damage for Ductile Materials in Metal Forming Processes

Youssef Hammi, Mark F. Horstemeyer, Doug J. Bammann
Proc. ASME. IMECE2002, Applied Mechanics and Biomedical Technology, 29-36, November 17–22, 2002
Publisher: American Society of Mechanical Engineers
Paper No: IMECE2002-32999
https://doi.org/10.1115/IMECE2002-32999
View Paper titled, Modeling of Anisotropic Damage for Ductile Materials in Metal Forming Processes
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Topics: Anisotropy, Damage, Metalworking, Modeling, Plasticity, Aluminum, Aluminum alloys, Constitutive equations, Continuum mechanics, Extruding