I am a Principal Member of the Technical Staff in the Multiscale Science
Department (Org. 1444) at Sandia National Laboratories. My work focuses on the development,
implementation, and application of multiscale, multiphysics modeling techniques for
computational solid mechanics. I am currently neck deep in peridynamics.
My interests span a number of interrelated areas, including mechanics, scientific
computing, and visualization. I am a graduate of the University of Colorado at Boulder,
where I earned BS, MS, and PhD degrees in Mechanical Engineering. Prior to joining Sandia, I
was a research associate at Rensselaer Polytechnic Institute
working with Professor Antoinette Maniatty in the area of computational polycrystal plasticity.
In addition to my research work, I have served as a course instructor at Rensselaer Polytechnic Institute and Syracuse University.
My professional experience includes working as a Project Engineer for BNP Associates, Inc.,
and serving as a member of the Quark Research Lab at Quark, Inc.
Peridigm, an open-source peridynamics code.
Sandia's Computing Research Center.
Sandia's Advanced Simulation and Computing (ASC) home page.
The Trilinos Project.
Recent Publications and Presentations
David Littlewood, Kyran Mish, and Kendall Pierson. 2012. Peridynamic Simulation of Damage Evolution for Structural Health Monitoring. Proceedings of the ASME 2012 International Mechanical Engineering Congress and Exposition, Houston, Texas.
Devin M. Pyle, Jing Lu, David J. Littlewood, and Antoinette M. Maniatty. 2012. Effect of 3D Grain Structure Representation in Polycrystal Simulations. Computational Mechanics. doi.
David Littlewood, John Foster, and Brad Boyce. Peridynamic Modeling of Localization in Ductile Metals. 22th International Workshop on Computatioal Mechanics of Materials, Baltimore, Maryland, September 24-26, 2012. slides.
Littlewood, David. 2011. A Nonlocal Approach to Modeling Crack Nucleation in AA 7075-T651. Proceedings of the ASME 2011 International Mechanical Engineering Congress and Exposition, Denver, Colorado. doi.
David Littlewood and Tracy Vogler. Modeling Dynamic Fracture with Peridynamics, Finite Element Modeling, and Contact. 11th US National Congress on Computational Mechanics, Minneapolis, Minnesota, July 25-28, 2011. slides.
J.D. Hochhalter, D.J. Littlewood, M.J. Veilleux, J.E. Bozek, A.M. Maniatty, A.D. Rollett, and A.R. Ingraffea. 2011. A Geometric Approach to Modeling Microstructurally Small Fatigue Crack Formation: III. Development of a Semi-Empirical Model for Nucleation. Modelling and Simulation in Materials Science and Engineering 19(3). doi.
Littlewood, David. 2010. Simulation of Dynamic Fracture using Peridynamics, Finite Element Modeling, and Contact. Proceedings of the ASME 2010 International Mechanical Engineering Congress and Exposition, Vancouver, British Columbia, Canada. doi.
J.D. Hochhalter, D.J. Littlewood, R.J. Christ Jr., M.J. Veilleux, J.E. Bozek, A.R. Ingraffea, and A.M. Maniatty. 2010. A Geometric Approach to Modeling Microstructurally Small Fatigue Crack Formation: II. Physically Based Modeling of Microstructure-Dependent Slip Localization and Actuation of the Crack Nucleation Mechanism in AA 7075-T651. Modelling and Simulation in Materials Science and Engineering 18(4). doi.
J.E. Bozek, J.D. Hochhalter, M.G. Veilleux, M. Liu, G. Heber, S.D. Sintay, A.D. Rollett, D.J. Littlewood, A.M. Maniatty, H. Weiland, R.J. Christ Jr., J. Payne, G. Welsh, D.G. Harlow, P.A. Wawrzynek, and A.R. Ingraffea. 2008. A Geometric Approach to Modeling Microstructurally Small Fatigue Crack Formation: I. Probabilistic Simulation of Constituent Particle Cracking in AA 7075-T651. Modelling and Simulation in Materials Science and Engineering 16(6). doi.