John A. Mitchell

Computational Multiscale

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Computational Multiscale

jamitch@sandia.gov

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(505) 844-3435

Sandia National Laboratories, New Mexico
 P.O. Box 5800
 Albuquerque, NM 87185-1322

Brief Research and Project History

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
  • Monte Carlo grain growth modeling of welding and additive manufacturing processes (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

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.

Education

  • 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)

Publications

  • 2022
  • Branch, B., Ruggles, T., Miers, J., Massey, C., Moore, D., Brown, N., Duwal, S., Silling, S., Mitchell, J., Specht, P., & Specht, P. (2022). Understanding Phase and Interfacial Effects of Spall Fracture in Additively Manufactured Ti-5Al-5V-5Mo-3Cr. https://doi.org/10.2172/1892129 Publication ID: 80360
  • 2021
  • Silling, S., Mitchell, J., & Mitchell, J. (2021). Modeling Spall in Additively Manufactured Steel With Local-Nonlocal Coupling [Conference Presenation]. https://doi.org/10.2172/1884654 Publication ID: 79559
  • Rodgers, T., Mitchell, J., Olson, A., Bolintineanu, D., Vackel, A., Moore, N.W., & Moore, N.W. (2021). Fast three-dimensional rules-based simulation of thermal-sprayed microstructures. Computational Materials Science, 194. https://doi.org/10.1016/j.commatsci.2021.110437 Publication ID: 77781
  • Rodgers, T., Moser, D., Abdeljawad, F., Jackson, O.D.U., Carroll, J.D., Jared, B.H., Bolintineanu, D., Mitchell, J., Madison, J.D., & Madison, J.D. (2021). Simulation of powder bed metal additive manufacturing microstructures with coupled finite difference-Monte Carlo method. Additive Manufacturing, 41. https://doi.org/10.1016/j.addma.2021.101953 Publication ID: 77780
  • Mitchell, J., Lofstead, G., Trageser, J., & Trageser, J. (2021). Stitching additive manufacturing SPPARKS microstructure simulations [Conference Presenation]. https://doi.org/10.2172/1844314 Publication ID: 75516
  • 2020
  • Tran, A., Mitchell, J., Swiler, L., Wildey, T., & Wildey, T. (2020). An active learning high-throughput microstructure calibration framework for solving inverse structure–process problems in materials informatics. Acta Materialia, 194, pp. 80-92. https://doi.org/10.1016/j.actamat.2020.04.054 Publication ID: 73364
  • Specht, P., Adams, D., Mitchell, J., Brown, J.L., Branch, B., Silling, S., Wise, J.L., Brown, D., Palmer, T., & Palmer, T. (2020). Response of Wrought and Additively Manufactured 304L Stainless Steel at Mbar Stresses [Presentation]. https://www.osti.gov/biblio/1812161 Publication ID: 74340
  • Lofstead, J., Mitchell, J., Chen, E., & Chen, E. (2020). Stitch It Up: Using Progressive Data Storage to Scale Science [Conference Poster]. Proceedings – 2020 IEEE 34th International Parallel and Distributed Processing Symposium, IPDPS 2020. https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85088891828&origin=inward Publication ID: 73227
  • Mitchell, J., Ivanoff, T., Dagel, D., Madison, J.D., Jared, B.H., & Jared, B.H. (2020). Linking pyrometry to porosity in additively manufactured metals. Additive Manufacturing, 31. https://doi.org/10.1016/j.addma.2019.100946 Publication ID: 66528
  • Jared, B.H., Madison, J.D., Saiz, D.J., Mitchell, J., Koepke, J.R., Ivanoff, T., & Ivanoff, T. (2020). Linking Pyrometry to Porosity in AM metals [Presentation]. https://www.osti.gov/biblio/1763169 Publication ID: 70865
  • 2019
  • Specht, P., Mitchell, J., Adams, D., Brown, J.L., Silling, S., Wise, J.L., Palmer , T., & Palmer , T. (2019). Shortening the Design and Certification Cycle for Additively Manufactured Materials by Improved Mesoscale Simulations and Validation Experiments: Fiscal Year 2019 Status Report. https://doi.org/10.2172/1570554 Publication ID: 65576
  • Jared, B.H., Madison, J.D., Mitchell, J., Saiz, D.J., Koepke, J.R., Dagel, D., Ivanoff, T., & Ivanoff, T. (2019). Detecting Process Defects in Laser-Powder Bed Fusion [Conference Poster]. https://www.osti.gov/biblio/1643040 Publication ID: 65999
  • Mitchell, J. (2019). An Approach to Upscaling SPPARKS Generated Synthetic Microstructures of Additively Manufactured Metals. https://doi.org/10.2172/1568985 Publication ID: 64960
  • Ivanoff, T., Madison, J.D., Mitchell, J., Dagel, D., Jared, B.H., & Jared, B.H. (2019). Correlation of Porosity Defects with In-situ Pyrometry in AM 316L SS [Conference Poster]. https://www.osti.gov/biblio/1642630 Publication ID: 65369
  • Jared, B.H., Mitchell, J., Ivanoff, T., Saiz, D.J., Koepke, J.R., Madison, J.D., Swiler, L., & Swiler, L. (2019). Defect Detection in Metal Additive Manufacturing Through Application of In-Situ Diagnostics [Conference Poster]. https://www.osti.gov/biblio/1641629 Publication ID: 70442
  • Mitchell, J., Ivanoff, T., Dagel, D., Jared, B.H., Koepke, J.R., Saiz, D.J., Swiler, L., & Swiler, L. (2019). Linking pyrometry to porosity in additive manufactured metals [Conference Poster]. https://www.osti.gov/biblio/1641333 Publication ID: 70077
  • Madison, J.D., Rodgers, T., Mitchell, J., Lim, H., Battaile, C., Karlson, K., Skulborstad, A., Salloum, M., & Salloum, M. (2019). Materials Margins Assurance: Incorporating Material Variability in Simulation Tools and Code [Conference Poster]. https://www.osti.gov/biblio/1641377 Publication ID: 70061
  • Madison, J.D., Ivanoff, T., Mitchell, J., Dagel, D., Koepke, J.R., Saiz, D.J., Jared, B.H., & Jared, B.H. (2019). High Value Pyrometry-To-Defect Correspondence in Laser Powder Bed Fusion of 316L Stainless Steel [Conference Poster]. https://www.osti.gov/biblio/1641111 Publication ID: 69653
  • Specht, P., Silling, S., Mitchell, J., Battaile, C., Brown, J.L., Wise, J.L., Adams, D., Brown, D., Palmer, T., Michael, J., Saavedra, M., & Saavedra, M. (2019). Shortening the Design and Certification Cycle for Additively Manufactured Materials by Improved Mesoscale Simulations and Validation Experiments [Presentation]. https://www.osti.gov/biblio/1645212 Publication ID: 68419
  • Jared, B.H., Madison, J.D., Ivanoff, T., Swiler, L., Saiz, D.J., Dagel, D., Mitchell, J., Koepke, J.R., & Koepke, J.R. (2019). Defect Detection in Metal Additive Manufacturing Through Application of In-Situ Diagnostics [Conference Poster]. https://www.osti.gov/biblio/1639391 Publication ID: 67457
  • Mitchell, J., Ivanoff, T., Madison, J.D., Dagel, D., Jared, B.H., & Jared, B.H. (2019). Linking in-situ pyrometry to pores [Conference Poster]. https://www.osti.gov/biblio/1639339 Publication ID: 67376
  • Madison, J.D., Dagel, D., Ivanoff, T., Jared, B.H., Koepke, J.R., Mitchell, J., Saiz, D.J., Swiler, L., & Swiler, L. (2019). Defect Signatures for Metal Laser Powder-Bed Fusion [Conference Poster]. https://www.osti.gov/biblio/1639421 Publication ID: 67500
  • Rodgers, T., Moser, D., Abdeljawad, F., Martinez, M.J., Ford, K.R., Trembacki, B.L., Johnson, K., Mitchell, J., Madison, J.D., & Madison, J.D. (2019). Calibrated Monte Carlo Models of Microstructure Evolution for Additive Manufacturing [Conference Poster]. https://www.osti.gov/biblio/1639467 Publication ID: 67582
  • Specht, P., Adams, D., Silling, S., Mitchell, J., Battaile, C., Brown, J.L., Wise, J.L., Brown, D., Palmer, T., Michael, J., Saavedra, M., & Saavedra, M. (2019). Shortening the Design and Certification Cycle for Additively Manufactured Materials by Improved Mesoscale Simulations and Validation Experiments [Conference Poster]. https://www.osti.gov/biblio/1598928 Publication ID: 65567
  • 2018
  • Mitchell, J. (2018). Clustering to upscale microstructure morphologies [Conference Poster]. https://www.osti.gov/biblio/1806930 Publication ID: 59539
  • Specht, P., Adams, D., Mitchell, J., Silling, S., Brown, J.L., Wise, J.L., Brown, D., Palmer, T., & Palmer, T. (2018). Response of Wrought and Additively Manufactured 304L Stainless Steel Under High Pressure High Strain-Rate Loading [Conference Poster]. https://www.osti.gov/biblio/1806931 Publication ID: 59552
  • Ivanoff, T., Madison, J.D., Koepke, J.R., Swaller, E., Jared, B.H., Mitchell, J., Swiler, L., & Swiler, L. (2018). 3D Registration of Structure, Melt Pool History and Design in AM 316L Stainless Steel [Conference Poster]. https://www.osti.gov/biblio/1884475 Publication ID: 59634
  • Lofstead, G., Mitchell, J., & Mitchell, J. (2018). Lazy Minimal Eventually Consistent IO with Stitch [Conference Poster]. https://www.osti.gov/biblio/1592373 Publication ID: 59984
  • Ivanoff, T., Madison, J.D., Koepke, J.R., Jared, B.H., Mitchell, J., Swiler, L., & Swiler, L. (2018). 3D Characterization of Porosity in AM 316L SS and its Effect on Mechanical Behavior [Conference Poster]. https://www.osti.gov/biblio/1806770 Publication ID: 63719
  • Ivanoff, T., Madison, J.D., Koepke, J.R., Jared, B.H., Mitchell, J., Swiler, L., & Swiler, L. (2018). 3D Characterization of Porosity in AM 316L SS and its Effect on Mechanical Behavior [Conference Poster]. https://www.osti.gov/biblio/1582148 Publication ID: 63694
  • Rodgers, T., Moser, D., Mitchell, J., Abdeljawad, F., Martinez, M.J., Johnson, K., Madison, J.D., & Madison, J.D. (2018). Powder Bed Modeling Big and Small: Simulating Microstructural Evolution from a Single Bead to (Closer to) the Part Scale [Conference Poster]. https://www.osti.gov/biblio/1582157 Publication ID: 63688
  • Jared, B.H., Madison, J.D., Ivanoff, T., Mitchell, J., Schwaller, E., Koepke, J.R., Saiz, D.J., Dagel, D., Brown-Shaklee, H.J., Swiler, L., & Swiler, L. (2018). Defect Signatures for Metal Laser Powder Bed Fusion [Conference Poster]. https://www.osti.gov/biblio/1581712 Publication ID: 63670
  • Rodgers, T., Mitchell, J., Madison, J.D., & Madison, J.D. (2018). Monte Carlo Simulation of Polycrystalline Additive Manufacturing Microstructures [Conference Poster]. https://www.osti.gov/biblio/1882035 Publication ID: 63097
  • Mitchell, J. (2018). Towards upscaling microstructural effects using data analytics [Conference Poster]. https://www.osti.gov/biblio/1806536 Publication ID: 63205
  • Lefantzi, S., Bolintineanu, D., Lechman, J., Madison, J.D., Martinez, M.J., Mitchell, J., Moser, D., Noble, D., Rodgers, T., & Rodgers, T. (2018). Toward Validated Multiscale Multiphysics Modeling for Additive Manufacturing Processes [Conference Poster]. https://www.osti.gov/biblio/1515726 Publication ID: 62149
  • Mitchell, J. (2018). A local/nonlocal plasticity model for upscaling microstructural effects [Conference Poster]. https://www.osti.gov/biblio/1505276 Publication ID: 61383
  • Jared, B.H., Koepke, J.R., Saiz, D.J., Swiler, L., Mitchell, J., Madison, J.D., Ivanoff, T., Webb, K., Rodelas, J., Schwaller, E., & Schwaller, E. (2018). Defect Signatures for Metal Laser Powder Bed Fusion [Conference Poster]. https://www.osti.gov/biblio/1501973 Publication ID: 61124
  • 2017
  • Onunkwo, U., Ganti, A., Mitchell, J., Scoggin, M., Schroeppel, R., Van Leeuwen, B., Wolf, M., & Wolf, M. (2017). High Fidelity Simulations of Large-scale Wireless Networks (Part II – FY2017). https://doi.org/10.2172/1489863 Publication ID: 53778
  • Rodgers, T., Mitchell, J., Tikare, V., & Tikare, V. (2017). A Monte Carlo model for 3D grain evolution during welding. Modelling and Simulation in Materials Science and Engineering, 25(6). https://doi.org/10.1088/1361-651x/aa7f20 Publication ID: 57786
  • Rodgers, T., Johnson, K., Brown, J., Abdeljawad, F., Madison, J.D., Mitchell, J., Tikare, V., & Tikare, V. (2017). Modeling Microstructure Evolution During Metal Additive Manufacturing [Conference Poster]. https://www.osti.gov/biblio/1508469 Publication ID: 57562
  • Rodgers, T., Madison, J.D., Mitchell, J., Tikare, V., & Tikare, V. (2017). NUMERICAL SIMULATION OF MICROSTRUCTURAL EVOLUTION DURING ADDITIVE MANUFACTURING OF METALS [Conference Poster]. https://www.osti.gov/biblio/1458098 Publication ID: 56602
  • Mitchell, J. (2017). GrainGrowthModelingandNovelData AnalyticsforWeldProcess [Conference Poster]. https://www.osti.gov/biblio/1425305 Publication ID: 55055
  • 2016
  • Mitchell, J. (2016). Potts model for grain growth during welding using SPPARKS [Conference Poster]. https://www.osti.gov/biblio/1397119 Publication ID: 52561
  • Tikare, V., Castillo, A., Bond, S., Madison, J.D., Mitchell, J., Rodgers, T., & Rodgers, T. (2016). Methods for Quantitative Characterization of Microstructures [Presentation]. https://www.osti.gov/biblio/1392762 Publication ID: 52204
  • Mitchell, J. (2016). Novel Applicaon of Po0s Model for Grain Growth During Welding using SPPARKS [Conference Poster]. https://www.osti.gov/biblio/1365319 Publication ID: 49681
  • 2015
  • Littlewood, D., Mitchell, J., Thompson, A., & Thompson, A. (2015). Materials Modeling Capabiities [Presentation]. https://www.osti.gov/biblio/1340213 Publication ID: 42016
  • Mitchell, J. (2015). Ordinary Isotropic Constitutive Models for Peridynamics [Conference Poster]. https://www.osti.gov/biblio/1506748 Publication ID: 46192
  • Tikare, V., Weck, P., Mitchell, J., & Mitchell, J. (2015). Modeling of hydride precipitation and re-orientation. https://doi.org/10.2172/1332940 Publication ID: 45718
  • Littlewood, D., Silling, S., Mitchell, J., Seleson, P., Bond, S., Parks, M., Turner, D., Burnett, D., Ostien, J.T., Gunzburger, M., & Gunzburger, M. (2015). Strong Local-Nonlocal Coupling for Integrated Fracture Modeling. https://doi.org/10.2172/1221526 Publication ID: 45592
  • Littlewood, D., Silling, S., Seleson, P., Mitchell, J., & Mitchell, J. (2015). Coupling Approaches for Integrating Meshfree Peridynamic Models with Classical Finite Element Analysis [Conference Poster]. https://www.osti.gov/biblio/1339330 Publication ID: 44646
  • Mitchell, J. (2015). Ordinary Isotropic Peridynamic Models: Position Aware Viscoelastic(PAVE) [Conference Poster]. https://www.osti.gov/biblio/1249043 Publication ID: 43120
  • Mitchell, J., Tikare, V., & Tikare, V. (2015). Numerical Simulation of Ni Grain Growth in a Thermal Gradient [Conference Poster]. https://www.osti.gov/biblio/1246844 Publication ID: 42417
  • Baczewski, A., Frees, A., Gamble, J., Gao, X., Jacobson, N., Mitchell, J., Montano, I., Muller, R., Nielsen, E., & Nielsen, E. (2015). Device-Level Models Using Multi-Valley Effective Mass [Conference Poster]. https://www.osti.gov/biblio/1240116 Publication ID: 42249
  • Mitchell, J. (2015). Ordinary Isotropic Peridynamic Models; Position Aware Linear Solid (PALS) [Presentation]. https://www.osti.gov/biblio/1239086 Publication ID: 41642
  • Weck, P., Kim, E., Tikare, V., Mitchell, J., & Mitchell, J. (2015). Mechanical properties of zirconium alloys and zirconium hydrides predicted from density functional perturbation theory. Dalton Transactions, 44(43), pp. 18769-18779. https://doi.org/10.1039/c5dt03403e Publication ID: 45043
  • Muller, R., Aidun, J., Baczewski, A., Gao, X., Metodi, T., Mitchell, J., Sterk, J., Gamble, J., Blume-Kohout, R., Jacobson, N., & Jacobson, N. (2015). Silicon Qubits By Design [Conference Poster]. https://www.osti.gov/biblio/1244872 Publication ID: 41211
  • 2014
  • Mitchell, J., Tikare, V., & Tikare, V. (2014). Numerical Simulation of Ni Grain Growth in a Thermal Gradient [Conference Poster]. https://www.osti.gov/biblio/1315397 Publication ID: 39879
  • Mitchell, J. (2014). Peridynamics Ordinary Isotropic Plasticity Model [Conference Poster]. https://www.osti.gov/biblio/1367575 Publication ID: 39541
  • Littlewood, D., Silling, S., Seleson, P., Mitchell, J., & Mitchell, J. (2014). Integrating Meshfree Peridynamic Models with Classical Finite Element Analysis [Conference Poster]. https://www.osti.gov/biblio/1242046 Publication ID: 39224
  • Mitchell, J. (2014). A Simple One Step Line Search For Use in Quasi-static Solid Mechanics Contact Calculations [Presentation]. https://www.osti.gov/biblio/1502170 Publication ID: 38203
  • Silling, S., Mitchell, J., & Mitchell, J. (2014). Unifying the mechanics of continua cracks and particles [Presentation]. https://www.osti.gov/biblio/1496960 Publication ID: 37911
  • Mitchell, J., Silling, S., Littlewood, D., & Littlewood, D. (2014). Ordinary Isotropic Peridynamic Models\ Position Aware Linear Solid (PALS) [Presentation]. https://www.osti.gov/biblio/1497522 Publication ID: 37360
Showing 10 of 62 publications.

Software

SPPARKS