Uncertainty Informed Integrated Computational Materials Engineering for Design and Development of Fatigue Critical Alloys
11 Jan 2021 | Contributor(s):: Whelan, Gary Francis
Advisors: David L. McDowell, Richard Neu, Laura Swiler, Yan Wang, Hamid GarmestaniUncertainty is intrinsically tied to decision-making in design. Process-Structure-Property (PSP) relations are central to development of new and improved materials. The multitude of PSP linkages for any performance...
Qualification of Laser Powder Bed Fusion Processed 17-4 PH Stainless Steel as a Function of Powder Condition
08 Sep 2020 | Contributor(s):: Berez, Jaime Michael Schnaier
Advisors: Christopher Saldana, Thomas Kurfess, Katherine Fu, Ramesh RamakrishnanThe metal additive manufacturing process of laser powder-bed fusion (LPBF) presents a challenge to develop qualified processes to match the rapid pace of technology development. An aspect of the LPBF process where...
Microstructure-Sensitive Creep-Fatigue Interaction Crystal-Viscoplasticity Model for Single-Crystal Nickel-Base Superalloys
31 May 2018 | Contributor(s):: Estrada Rodas, Ernesto Alejandro
Advisors: Richard W. Neu, Rosario A. Gerhardt, Surya R. Kalidindi, David L. McDowell, Oliver N. PierronAn enhanced generation temperature-dependent crystal viscoplasticity (CVP) model targeting the creep-fatigue interactions in Ni-base superalloys single-crystals is developed. The model is fitted...
Water Cavitation Peening for Aerospace Materials
31 May 2018 | Contributor(s):: Marcon, Andrea
Advisors: Shreyes Melkote, Minami Yoda, Richard Neu, Christopher Saldana, James CastleConventional shot peening has been used for almost a century as a means to mechanically improve the fatigue and corrosion resistance of metals. It employs spherical shots of different size and materials to...
Data-driven reduced-order models for rank-ordering the high cycle fatigue performance of polycrystalline microstructures: codes and data files
01 Feb 2018 | Contributor(s):: Noah H. Paulson
This data-set contains the codes and data files relevant to the paper titled "Data-driven reduced-order models for rank-ordering thehigh cycle fatigue performance of polycrystalline microstructures" [Paulson2017_HomogenizationHCF]. Data-files are provided so that the figures...
Synthetic alpha-Ti Microstructures and Associated High Cycle Fatigue Responses via Crystal Plasticity Finite Element Method Simulations
09 Jun 2017 | Contributor(s):: Matthew William Priddy, Noah H. Paulson, Surya R. Kalidindi, David McDowell
SummaryThis data set consists of 100 microstructure volumes and their associated local responses as computed via crystal plasticity finite element method (CPFEM) simulations. Cyclic loading is performed to obtain microstructure responses consistent with the high cycle fatigue (HCF) regime. These...
Synthetic alpha-Ti Microstructures and Associated Transition Fatigue Responses
13 May 2017 | Contributor(s):: Matthew William Priddy, Noah Paulson, David McDowell, Surya R. Kalidindi
SummaryThis data set consists of over 3600 microstructure volumes and their associated local responses after three cycles of cyclic loading. This loading is expected to result in microstructure responses consistent with the transition regime between high cycle fatigue (HCF) and low cycle fatigue...
Noah Paulson Research
This wiki contains pages which introduce and motivate Noah Paulson’s Ph.D. work
MKS for Titanium Polycrystals - Rank Ordering of HCF Resistance using Localization
Improvements to the Computational Pipeline in Crystal Plasticity Estimates of High Cycle Fatigue of Microstructures
27 May 2016 | Contributor(s):: Kern, Paul Calvin
Advisors: David L. McDowell, Laurent Capolungo, Richard W. NeuThe objective of this work is to provide various improvements to the modeling and uncertainty quantification of fatigue lives of materials as understood via simulation of crystal plasticity models applied to synthetically reconstructed...
Design and Testing of an Orthogonal LCP Interconnect for RF Applications in High Vibration Environments
27 May 2016 | Contributor(s):: Guidoni, Luca
Advisors: Massimo Ruzzene, Julian Rimoli, Graeme Kennedy, Minfeng YuA new design is presented for a wideband orthogonal interconnect between two perpendicular printed wiring boards, employing novel geometries and materials to minimize stress under cyclic loading. This will ensure fatigue...
Modeling Microstructurally Small Crack Growth in Al 7075-T6
21 Sep 2015 | Contributor(s):: Hennessey, Conor Daniel
Advisors: David L. McDowell, Richard Neu, Shuman XiaFatigue of metals is a problem that affects almost all sectors of industry, from energy to transportation, and failures to account for fatigue or incorrect estimations of service life have cost many lives. To mitigate such fatigue failures,...
Microstructural Effects on Fatigue Damage Evolution in Advanced High Strength Sheet (AHSS) Steels
08 Jun 2015 | Contributor(s):: Godha, Anshul
Advisors: Arun M. Gokhale, Shrikant P. Bhat, Preet Singh, Stephen D. Antolovich, Kimberly E. KurtisAn understanding of the damage evolution prior to crack initiation in advanced structural materials is of vital importance to the fatigue community in both academia and industry. Features known as...
Temperature Dependent Fretting Damage Modeling of AISI 301 Stainless Steel
12 Jan 2015 | Contributor(s):: Hirsch, Michael Robert
Advisors: Richard W. Neu, Stephen D. Antolovich, David L. McDowell, Preet M. Singh, Suresh K. SitaramanPrediction of fatigue damage due to fretting is complex due to the number of influential factors and the competitive interaction between wear and fatigue. The majority of current fretting damage...
Microstructure-Sensitive Plasticity and Fatigue of Three Titanium Alloy Microstructures
21 Oct 2013 | Contributor(s):: Smith, Benjamin Daniel
Advisors: David L. McDowell, Richard W Neu, Olivier N Pierron, Donald S ShihTitanium alloys are employed in many advanced engineering applications due to their exceptional properties, i.e., a high strength-to-weight ratio, corrosion resistance, and high temperature strength. The performance of...
Influence of the Environment on the Fatigue Properties of Alumina Ultra-Thin Coatings and Silicon and Nickel Thin Films
20 Sep 2013 | Contributor(s):: Baumert, Eva K.
Advisors: Olivier N. Pierron, Oliver Brand, Samuel Graham, Steven D. Antolovich, David L. McDowellThis dissertation presents the investigation of three thin film materials used in microelectromechanical systems (MEMS): alumina, silicon, and nickel. For this purpose, novel experimental techniques...
Thermomechanical Fatigue Crack Formation in Nickel-Base Superalloys at Notches
20 May 2012 | Contributor(s):: Fernandez-Zelaia, Patxi
Advisors: Richard W. Neu, David L. McDowell, Stephen D. AntolovichHot sections of gas engine turbines require specialized materials to withstand extreme conditions present during engine operation. Nickel-base superalloys are typically used as blades and disks in the high pressure turbine section...
Modeling the Effects of Shot-Peened Residual Stresses and Inclusions on Microstructure-Sensitive Fatigue of Ni-Base Superalloy Components
20 Aug 2019 | Contributor(s):: Musinski, William D.
Advisors: David L. McDowell, Richard W. Neu, Olivier N. Pierron, Ken Gall, Julian J. Rimoli, Patrick J. GoldenThe simulation and design of advanced materials for fatigue resistance requires an understanding of the response of their hierarchical microstructure attributes to imposed load,...