Center for Computing Research (CCR)

Center for Computing Research

David John Littlewood

David John Littlewood
Computational Multiscale
Email: djlittl@sandia.gov
Phone: 505/284-0830
Fax: 505/845-7442

Mailing address:
Sandia National Laboratories
P.O. Box 5800, MS 1322
Albuquerque, NM
87185-1320

I am a member of 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.

Personal web page

Education/Background

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.

Projects

Albany

Software

Peridigm

Selected Publications & Presentations

2015	Costa, Timothy, Stephen Bond, David Littlewood, Stan Moore, "Peridynamic Multiscale Finite Element Methods," SAND Report, December 2015. D'Elia, Marta, Mauro Perego, Pavel B. Bochev, David John Littlewood, "A coupling strategy for nonlocal and local diffusion models with mixed volume constraints and boundary conditions," Journal Article, Computer and Mathematics with Applications, Accepted/Published December 2015. Littlewood, David, Stewart Silling, Pablo Seleson, John Mitchell, "Coupling Approaches for Integrating Meshfree Peridynamic Models with Classical Finite Element Analysis," Presentation, 13th U.S. National Congress on Computational Mechanics, July 2015. Littlewood, David, Stewart Silling, Pablo Seleson, "Coupling Meshfree Peridynamics with Local Finite-Element Models," Presentation, ASME 2015 International Mechanical Engineering Congress and Exposition, November 2015. Littlewood, David, Mike Hillman, Edouard Yreux, Joseph Bishop, Frank Beckwith, Jiun-Shyan Chen, "Implementation and verification of RKPM in the Sierra/SolidMechanics analysis code," Conference Paper, ASME 2015 International Mechanical Engineering Congress and Exposition, November 2015. Littlewood, David, "Progress and Challenges in Computational Peridynamics," Presentation, Workshop on Nonlocal Models in Mathematics, Computation, Science, and Engineering, October 2015. Littlewood, David J., "Roadmap for peridynamic software implementation," SAND Report, October 2015. Littlewood, David J., Stewart A. Silling, John A. Mitchell, Pablo Seleson, Stephen D. Bond, Michael L. Parks, Daniel Z. Turner, Damon J. Burnett, Jakob Ostien, Max Gunzburger, "Strong local-nonlocal coupling for integrated fracture modeling," SAND Report, September 2015. Mitchell, John A., Stewart A. Silling, David John Littlewood, "A position-aware linear solid constitutive model for peridynamics," Journal Article, Journal of Mechanics of Materials and Structures, Vol. 10, No. 5, pp. 539–557, Accepted/Published November 2015. Silling, Stewart A., David J. Littlewood, Pablo Seleson, "Variable horizon in a peridynamic medium," Journal Article, Journal of Mechanics of Materials and Structures, Vol. 10, No. 5, pp. 539–557, Accepted/Published November 2015.
2014	Littlewood, David, Jesse Thomas, Timothy Shelton, "Estimation of the Critical Time Step for Peridynamic Models," Presentation, 17th U.S. National Congress on Theoretical and Applied Mechanics, June 2014. Littlewood, David, Stewart Silling, Pablo Seleson, "Local-Nonlocal Coupling for Modeling Fracture," Presentation, ASME 2014 International Mechanical Engineering Congress and Exposition, November 2014. Littlewood, David, "The Peridynamic Theory of Solid Mechanics for Modeling Material Failure and Fracture," Presentation, Seminar, University of California, San Diego., May 2014. Littlewood, David John, Stewart A. Silling, Pablo Seleson, John A. Mitchell, "Integrating Meshfree Peridynamic Models with Classical Finite Element Analysis," Presentation, Meshfree Methods for Large-Scale Computational Science and Engineering Workshop, October 2014. Mitchell, John A, Stewart Silling, David Littlewood, "Ordinary Isotropic Peridynamic Models: Position Aware Linear Solid (PALS) ," Presentation, 17th US National Congress on Theoretical & Applied Mechanics, June 2014.
2013	Littlewood, David, Michael Parks, John Mitchell, Stewart Silling, "The Peridigm Framework for Peridynamic Simulations," Presentation, 12th U.S. National Congress on Computational Mechanics, July 2013. Littlewood, David, Stewart Silling, "Variable Nonlocal Length Scale in a Peridynamic Body with Applications to Local-Nonlocal Coupling," Presentation, ASME International Mechanical Engineering Congress and Exposition, November 2013. Littlewood, David J., Veena Tikare, John Bignell, "Informing Macroscale Constitutive Laws through Peridynamic Modeling of Grain-Scale Mechanisms in Plutonium Oxide," Presentation, Workshop on Nonlocal Damage and Failure: Peridynamics and Other Nonlocal Models, March 2013. Parks, Michael L, David J Littlewood, John A Mitchell, Stewart A Silling, "Peridigm: A New Paradigm in Computational Peridynamics," Presentation, 2013 Joint Mathematics Meetings , January 2013. Silling, Stewart A., Pablo Seleson, David John Littlewood, "Variable Length Scale in a Peridynamic Body," Conference Paper, SIAM Conference on Mathematical Aspects of Materials Science, June 2013.
2012	Littlewood, David J., John T. Foster, Brad L. Boyce, "Peridynamic Modeling of Localization in Ductile Metals," Presentation, 22th International Workshop on Computational Mechanics of Materials, September 2012. Littlewood, David J., Veena Tikare, "Peridynamic Modeling of Void Collapse in Representative Plutonium Oxide Microstructures," Presentation, ASME International Mechanical Engineering Congress and Exposition, November 2012. Littlewood, David J., Kyran D. Mish, Kendall H. Pierson, "Peridynamic Simulation of Damage Evolution for Structural Health Monitoring," Conference Paper, ASME 2012 International Mechanical Engineering Congress and Exposition, November 2012. Littlewood, David J., Kyran D. Mish, Kendall H. Pierson, "Quasi-statics, Modal Analysis, and Structural Health Monitoring within the Peridynamic Framework," Presentation, ASME International Mechanical Engineering Congress and Exposition, November 2012. Pyle, Devin M., Jing Lu, David J. Littlewood, Antoinette M. Maniatty, "Effect of 3D Grain Structure Representation in Polycrystal Simulations," Journal Article, Computational Mechanics, Accepted/Published October 2012.
2011	Hochhalter, Jacob D., David J. Littlewood, Veilleux J. Michael, Bozek E. Jeffery, Antoinette M. Maniatty, Anthony D. Rollett, "A Geometric Approach to Modeling Microstructurally Small Fatigue Crack Formation: III. Development of a Semi-Empirical Model for Nucleation," Journal Article, Modelling and Simulation in Materials Science and Engineering, Vol. 19, No. 3, Accepted/Published April 2011. Littlewood, David J., "A Nonlocal Approach to Modeling Crack Nucleation in AA 7075-T651," Conference Paper, ASME 2011 International Mechanical Engineering Congress and Exposition, November 2011. Turner, Daniel Z., David J. Littlewood, Mario J. Martinez, "Building a Framework for Flow through Heterogeneous Fractured Media Based on the Peridynamic Theory," Presentation, 11th US National Congress on Computational Mechanics, July 2011.
2010	Littlewood, David J, "Simulation of Dynamic Fracture Using Peridynamics, Finite Element Modeling, and Contact," Conference Paper, ASME International Mechanical Engineering Congress and Exposition, Vancouver, BC, Canada, November 2010.
2009	Crane, Nathan, Arne Gullerud, David Littlewood, Alex Lindblad, "Comparison of Computational Fracture Techniques for Dynamic Tensile Extrusion Test," Presentation, US National Congress on Computational Mechanics, USNCCM-10, Columbus, OH, July 2009. Littlewood, David, Alex Lindblad, Arne Gullerud, Nathan Crane, "Modeling Fragment Size Distributions in Dynamic Loading Simulations," Presentation, US National Congress on Computational Mechanics, USNCCM-10, Columbus, OH, July 2009.