Microstructure Sensitive Multiscale Modeling of Fracture in Polycrystalline Metals
10 Jun 2021 | Contributor(s):: Roy, Ushasi
Advisors: Min Zhou, David McDowell, Ting Zhu, Antonia Antoniou, Arash YavariSystematic exploration of the correlation between macroscale properties and microstructure attributes provides decision support to design new material microstructures with tailored properties. Currently no systematic...
Structure-Property Linkages for Polycrystalline Materials Using Materials Knowledge Systems
20 Aug 2018 | Contributor(s):: Paulson, Noah H.
Advisors: Surya R. Kalidindi, David L. McDowell, Donald S. Shih, Richard W. Neu, Hamid GarmestaniComputational tools that are capable of rapidly exploring candidate microstructures and their associated properties are required to accelerate the rate of development and deployment of novel...
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...
Extraction of Elastic-Plastic Material Properties From Spherical Indentation Stress-Strain Measurements and Finite Element Simulations
07 Jun 2017 | Contributor(s):: Patel, Dipen
Advisors: Surya R. Kalidindi, David L. McDowell, Hamid Garmestani, Richard W. Neu, Antonia AntoniouSimulating complex interactions at different length scales of a hierarchical material system is essential to multi-scale modelling techniques. Such models, however, need reliable information on the...
Microstructure-Sensitive Fatigue Modeling of Medical-Grade Fine Wire
11 Jan 2017 | Contributor(s):: Clark, Brian
Advisors: Richard W Neu, David L McDowell, Markus ReitererThis work presents a model to assess the microstructure-sensitive high-cycle fatigue (HCF) performance of thin MP35N alloy wires used as conductors in cardiac leads. The major components of this model consist of a microstructure generator...
Exploration of Forward and Inverse Protocols for Property Optimization of Ti-6Al-4v
22 Aug 2016 | Contributor(s):: Priddy, Matthew William
Advisors: David L. McDowell, Donald S. Shih, Surya R. Kalidindi, Rick W. Neu, Hamid GarmestaniThe modeling and simulation of advanced engineering materials undergoing mechanical loading requires accurate treatment of relevant microstructure features, such as grain size and crystallographic...
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...
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,...
Microstructure-Sensitive Simulation of Shock Loading in Metals
22 May 2014 | Contributor(s):: Lloyd, Jeffrey T.
Advisors: David L. McDowell, John D. Clayton, Min Zhou, Julian J. Rimoli, Naresh N. Thadhani, Shuman XiaA constitutive model has been developed to model the shock response of single crystal aluminum from peak pressures ranging from 2-110 GPa. This model couples a description of higher-order...
Modeling the Mechanical Behavior and Deformed Microstructure of Irradiated BCC Materials Using Continuum Crystal Plasticity
13 Jan 2014 | Contributor(s):: Patra, Anirban
Advisors: David L. McDowell, Chaitanya Deo, Hamid Garmestani, Naresh Thadhani, Ting ZhuThe mechanical behavior of structural materials used in nuclear applications is significantly degraded as a result of irradiation, typically characterized by an increase in yield stress, localization of...
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...