Conference presentations and talks
Synchrotron in situ characterization of fatigue crack initiation influenced by intentionally seeded porosity in an additively manufactured superalloy
K. S. Stopka, J. Solano, P. Kenesei, J-S. Park, H. Sharma, and M. D. Sangid. Presented at The Minerals, Metals & Materials Society (TMS) 2025 in Las Vegas, NV on March 26, 2025.
Modeling fatigue crack initiation and propagation life in additively manufactured alloys across fatigue regimes
K. S. Stopka and M. D. Sangid. Presented at TMS 2025 in Las Vegas, NV on March 26, 2025.
Fatigue Resistance of Aluminum Alloy Components Repaired Using Cold Spray
K. S. Stopka, P. E. Morrison, J. I. Ferguson, and M. D. Sangid. Presented at TMS 2025 in Las Vegas, NV on March 25, 2025.
Rapid Qualification of Additively Manufactured Materials with Pore Defects
K. S. Stopka, Y. Sun, P. Kenesei, J-S. Park, J. Solano, A. Desrosiers, A. Andreaco, G. Lin, and M. D. Sangid. Presented at the 2024 Future Leaders in Aerospace Symposium at Stanford, CA on May 17, 2024.
Scientific Examples and Demonstration of Fast Fourier Transform-based Simulations with X-ray Experiments to Explore Deformation and Fatigue in Structural Alloys
M. D. Sangid, K. S. Stopka and K. Jung (joint presentation). Presented at the Advanced Photon Source Users Meeting in Lemont, IL on May 8, 2024.
Multimodal Characterization and Modeling of Additively Manufactured Alloys with Intentionally Seeded Pores
K. S. Stopka, Y. Sun, P. Kenesei, J-S. Park, J. Solano, A. Desrosiers, A. Andreaco, G. Lin, and M. D. Sangid. Presented at TMS 2024 in Orlando, FL on March 7, 2024.
Crystal Plasticity Fatigue Modeling of Additively Manufactured Materials with Various Pore Defect Morphology
K. S. Stopka and M. D. Sangid. Presented at TMS 2024 in Orlando, FL on March 5, 2024.
Intentionally Seeding Pores in Laser Powder Bed Fusion IN718: Microstructure, Defects, and Fatigue
K. S. Stopka, A. Desrosiers, T. Nicodemus, N. Krutz, A. Andreaco, and M. D. Sangid. Presented at TMS 2023 in San Diego, CA on March 22, 2023.
Modeling Fatigue Resistance in Additively Manufactured Alloys with Porosity Defects
K. S. Stopka and M. D. Sangid. Presented at TMS 2023 in San Diego, CA on March 22, 2023.
Structural and fatigue analysis of a rotating detonation rocket engine
K. S. Stopka, J. Smallwood, A. Chokshi, S. D. Heister, and M. D. Sangid. Presented at the 2023 American Institute of Aeronautics and Astronautics (AIAA) SciTech Forum in National Harbor, MD on January 26, 2023.
Experimental validation of crystal plasticity models with additively manufactured defects
K. S. Stopka and M. D. Sangid. Presented at the 2023 AIAA SciTech Forum in National Harbor, MD on January 23, 2023.
Examining the micromechanical response of additively manufactured Alloy 718 intentionally seeded with pores
K. S. Stopka, A. Desrosiers, T. Nicodemus, A. Andreaco, and M. D. Sangid. Presented at Workshop on High-Energy Diffraction Microscopy (HEDM) analysis using Microstructural Imaging using Diffraction Analysis Software (MIDAS) in Lemont, IL on November 9, 2022.
INVITED: Micromechanical modeling of porosity defects in additively manufactured alloys
K. S. Stopka and M. D. Sangid. Presented at the 2022 International Conference on Additive Manufacturing (ICAM 2022) in Orlando, FL on November 3, 2022.
Progress towards a standard for rapid qualification of additively manufactured materials based on defect structures
K. S. Stopka, A. Desrosiers, T. Nicodemus, A. Andreaco, and M. D. Sangid. Presented at ICAM 2022 in Orlando, FL on November 2, 2022.
INVITED: Modeling fatigue using digital microstructures: applications of DREAM.3D
K. S. Stopka, M. Yaghoobi, J. E. Allison, D. L. McDowell, and M. D. Sangid. Presented at the 2022 Workshop on Methods for 3D Microstructure Studies in Pittsburgh, PA on August 17, 2022.
Microstructure-sensitive modeling of surface roughness and notch effects on extreme value fatigue response
K. S. Stopka, M. Yaghoobi, J. E. Allison, and D. L. McDowell. Presented virtually at the Annual PRISMS Center Workshop on August 12, 2022.
Effects of boundary conditions on microstructure-sensitive fatigue crystal plasticity analysis
K. S. Stopka, M. Yaghoobi, J. E. Allison, and D. L. McDowell. Presented at The 6th World Congress on Integrated Computational Materials Engineering (ICME 2022) in Incline Village, NV on April 25, 2022.
Micromechanical modeling of porosity defects in additively manufactured alloys
K. S. Stopka and M. D. Sangid. Presented at TMS 2022 in Anaheim, CA on March 2, 2022.
Microstructure effects on the extreme value fatigue response of FCC metals and alloys: effects of sample size and grain neighborhood
K. S. Stopka, M. Yaghoobi, J. E. Allison, and D. L. McDowell. Presented at TMS 2022 in Anaheim, CA on March 1, 2022.
PRISMS-Fatigue: overview and case studies
K. S. Stopka, M. Yaghoobi, A. Lakshmanan, V. Sundararaghavan, J. E. Allison, and D. L. McDowell. Presented virtually at the Annual PRISMS Center Workshop on August 3, 2021.
Reconstruction of microstructure and defects in an Alpha + Beta processed Ti-6Al-4V plate product using high-energy x-ray diffraction microscopy and DREAM.3D
K. S. Stopka, J.S. Park, H. Sharma, A. C. Chuang, P. Kenesei, Y. Gao. et al. Presented virtually at the 5th International Congress on 3D Materials Science (3DMS) 2021 on July 1, 2021.
Effects of surface roughness on microstructure-sensitive computations of fatigue crack formation driving force in duplex Ti-6Al-4V and Al 7075-T6
K. S. Stopka and D. L. McDowell. Presented at TMS 2020 in San Diego, CA on February 26, 2020.
Microstructure-sensitive computational estimates of driving forces for surface vs. subsurface fatigue crack formation in Duplex Ti-6Al-4V and Al 7075-T6
K. S. Stopka and D. L. McDowell. Presented at Materials Science and Technology (MS&T) 2019 in Portland, OR on September 30, 2019.
Microstructure-sensitive computational multiaxial fatigue
K. S. Stopka and D. L. McDowell. Presented at the 12th International Conference on Multiaxial Fatigue and Fracture (ICMFF12) 2019 in Bordeaux, France on June 24, 2019.
Gaussian-process-driven adaptive sampling for reduced-order modeling of texture effects in polycrystalline Alpha-Ti
A. E. Tallman, K. S. Stopka, L. P. Swiler, Y. Wang, S. R. Kalidindi, and D. L. McDowell. Presented at TMS 2019 in San Antonio, TX on March 12, 2019.
Computational statistics of formation and early growth of microstructurally small cracks in Ti-6Al-4V
K. S. Stopka and D. L. McDowell. Presented at MS&T 2018 in Columbus, OH on October 17, 2018.