Center for Computing Research (CCR)

Center for Computing Research

John A. Mitchell

John A. Mitchell
Computational Multiscale
Phone: 505/844-3435
Fax: 505/845-7442

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

Brief Research and Project History

  • Nonlinear solver algorithms and implementations for solid mechanics
  • Engineering project management
  • Technology maturation and assessment
  • Constitutive model development (particularly Peridynamics)
  • GPU programming
  • Inverse problems
  • Models for grain growth in metals using Kinetic Monte Carlo (KMC)
  • Data analytics applied to metal material microstructures, insitu pyrometry data
  • Grain morphology effects on dynamic response of additively manufactured metals

Current Activities

My work is at the confluence of engineering mechanics (especially continuum mechanics), materials and data science, mathematics, algorithms development, and software implementations.  I am especially interested in bridging the gap between engineering and applied mathematics, and demonstrating and/or developing novel solutions and implementations for emerging problems.

  • Microstructure effects on dynamic response of materials
  • Grain growth modeling of welding and additive manufacturing processes using KMC (see SPPARKS)
  • Data analytics & machine learning applied to material microstructures
  • Peridynamics constitutive model development towards multiscale analysis and upscaling
  • Processing and analysis of measured additive manufacturing pyrometer data

Recent Project Work and Activities (See reports/presentations below)

Other Activities and Interests

I'm from Homer Alaska and I like to visit there during the summer for camping/hiking/fishing and visiting with friends.   I also like to exercise and at one time was very active in training for triathlons -- now I just try to move a bit every day.



  • B.S. Ocean Engineering Texas A&M University (1987)
  • M.S. Engineering Mechanics Virginia Tech (Advisor: J.N. Reddy, Thesis topic: Finite element formulation and implementation for piezoelectricity) (1992)
  • Ph.D. Mechanical Engineering Texas A&M University (Advisor: J.N. Reddy, Thesis topic: Multilevel/hierarchical preconditioning for p-finite elements) (1997)


Selected Publications & Presentations

  • Mitchell, John A., Thomas Ivanoff, Jonathan D Madison, Daryl Dagel, Bradley Howell Jared, Joshua Robert Koepke, David J. Saiz, "Linking in-situ pyrometry to pores," Presentation, TMS2019: 148th Annual Meeting and Exhibition, San Antonio Tx, March 2019.
  • Mitchell, John A., "Clustering to upscale microstructural morphologies," Poster, 9th International Conference on Multiscale Materials Modeling, Osaka, Japan, October 2018.
  • Mitchell, John A., "Towards upscaling microstructural effects using data analytics," Presentation, WCCMXIII: World Congress in Computational Mechanics, New York City, July 2018.
  • Castillo, Andrew R, John A. Mitchell, Stephen D Bond, "Using and Developing Novel Data Analytics for Digitalized Microstructures ," SAND Report, November 2016.
  • Mitchell, John A., "Potts model for grain growth during welding using SPPARKS," Poster, 8th International Conference on Multiscale Materials Modeling, Dijon France, October 2016.
  • Mitchell, John A, Marco Alvares, Michael S Baker, Mathew A Spletzer, Danelle M Tanner, "The Sandia MEMS Passive Shock Sensor: FY09 Maturation Activities Reaching TRL 5+," SAND Report, November 2009.