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

  • 2024
  • Littlewood, D.J., Parks, M.L., Foster, J.T., Mitchell, J.A., Diehl, P., & Diehl, P. (2024). The Peridigm Meshfree Peridynamics Code. Journal of Peridynamics and Nonlocal Modeling, 6(1), pp. 118-148. https://doi.org/10.1007/s42102-023-00100-0 Publication ID: 106868
  • 2023
  • Mitchell, J.A., Abdeljawad, F., Battaile, C., Garcia-Cardona, C., Holm, E.A., Homer, E.R., Madison, J., Rodgers, T., Thompson, A.P., Tikare, V., Webb, E., Plimpton, S.J., & Plimpton, S.J. (2023). Parallel simulation via SPPARKS of on-lattice kinetic and Metropolis Monte Carlo models for materials processing. Modelling and Simulation in Materials Science and Engineering, 31(5). https://doi.org/10.1088/1361-651x/accc4b Publication ID: 106876
  • Mitchell, J.A. (2023). Modeling Additively Manufactured Metallic Microstructures for Dynamic Response [Conference Presenation]. https://doi.org/10.2172/2430555 Publication ID: 125888
  • 2022
  • Rodgers, T., Abdeljawad, F.F., Moore, R.D., Bishop, J.E., Johnson, K.L., Lim, H., Madison, J., Mitchell, J.A., Moser, D.R., Tikare, V., Trageser, J., Rezwan, A.A., Aragon, N.K., Brown, J.A., & Brown, J.A. (2022). Simulating additive manufacturing with SPPARKS – process modeling for realistic 3D microstructures [Conference Presenation]. https://doi.org/10.2172/2005996 Publication ID: 120720
  • Branch, B.A., Ruggles, T., Miers, J.C., Massey, C., Moore, D., Brown, N., Duwal, S., Silling, S.A., Mitchell, J.A., Specht, P.E., & Specht, P.E. (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
  • Trageser, J., Mitchell, J.A., Johnson, K.L., & Johnson, K.L. (2022). Employing a Bezier curve model for simulating microstructure generation during the AM process [Conference Presenation]. https://doi.org/10.2172/2004045 Publication ID: 115436
  • Specht, P.E., Mitchell, J.A., Silling, S.A., Brown, J.L., Branch, B.A., & Branch, B.A. (2022). Efforts in Modeling Complex Materials and Microstructures [Conference Presenation]. https://doi.org/10.2172/2006384 Publication ID: 122216
  • Branch, B.A., Ruggles, T., Moore, D., Miers, J.C., Specht, P.E., Duwal, S., Mitchell, J.A., Silling, S.A., Brown, B., Carpenter, J., & Carpenter, J. (2022). Understanding microstructural effects of spallation in additively manufactured Ti-5Al-5V-5Mo-3Cr towards the development of a two-phase microstructurally aware model [Conference Poster]. https://doi.org/10.2172/2003881 Publication ID: 114808
  • Branch, B.A., Brown, J.L., Ruggles, T., Silling, S.A., Mitchell, J.A., Adams, D.P., Specht, P.E., & Specht, P.E. (2022). Probing the effects of microstructure on material strength in additively manufactured 304L stainless steel through Richtmeyer-Meshkov instability experiments [Conference Presenation]. https://doi.org/10.2172/2003156 Publication ID: 112028
  • Arnhart, M., Polonsky, A., Ivanoff, T., Mitchell, J.A., Dagel, D., Madison, J., Jared, B.H., & Jared, B.H. (2022). IN-SITU PYROMETRY AS AN INDICATORFOR DEFECTS IN ADDIVITELY MANUFACTURED METALS – REVISITED [Conference Presenation]. https://doi.org/10.2172/2001881 Publication ID: 108544
  • Rodgers, T., Moore, R., Mitchell, J.A., Trageser, J., Moser, D.R., Abdeljawad, F.F., Madison, J., & Madison, J. (2022). Recent advancements in SPPARKS metal additive manufacturing simulation capabilities [Conference Presenation]. https://doi.org/10.2172/2001900 Publication ID: 108620
  • 2021
  • Silling, S.A., Mitchell, J.A., & Mitchell, J.A. (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.A., Olson, A.J., Bolintineanu, D.S., 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., Abdeljawad, F., Moser, D.R., Bachman, W.B., Carroll, J.D., Jared, B.H., Bolintineanu, D.S., Mitchell, J.A., Madison, J., & Madison, J. (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.A., Lofstead, G.F., Trageser, J., & Trageser, J. (2021). Stitching additive manufacturing SPPARKS microstructure simulations [Conference Presenation]. https://doi.org/10.2172/1844314 Publication ID: 75516
  • 2020
  • Trageser, J., Mitchell, J.A., & Mitchell, J.A. (2020). A Bezier Curve Informed Melt Pool Geometry to Model Additive Manufacturing Microstructures Using SPPARKS. https://doi.org/10.2172/1664647 Publication ID: 99724
  • Bachman, W.B., Mitchell, J.A., Swiler, L.P., 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(C), pp. 80-92. https://doi.org/10.1016/j.actamat.2020.04.054 Publication ID: 73364
  • Specht, P.E., Adams, D.P., Mitchell, J.A., Brown, J.L., Branch, B.A., Silling, S.A., 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, G.F., Mitchell, J.A., 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.A., Ivanoff, T., Dagel, D., Madison, J., Jared, B.H., & Jared, B.H. (2020). Linking pyrometry to porosity in additively manufactured metals. Additive Manufacturing, 31(C). https://doi.org/10.1016/j.addma.2019.100946 Publication ID: 66528
  • Jared, B.H., Madison, J., Saiz, D.J., Mitchell, J.A., 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
  • Jared, B.H., Madison, J., Mitchell, J.A., 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.A. (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., Mitchell, J.A., 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
  • Specht, P.E., Mitchell, J.A., Adams, D.P., Brown, J.L., Silling, S.A., 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., Mitchell, J.A., Ivanoff, T., Saiz, D.J., Koepke, J.R., Madison, J., 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
  • Madison, J., Ivanoff, T., Mitchell, J.A., 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
  • Madison, J., Rodgers, T., Mitchell, J.A., Lim, H., Battaile, C., Karlson, K.N., Skulborstad, A.J., 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
  • Mitchell, J.A., Ivanoff, T., Dagel, D., Jared, B.H., Koepke, J.R., Saiz, D.J., Swiler, L.P., & Swiler, L.P. (2019). Linking pyrometry to porosity in additive manufactured metals [Conference Poster]. https://www.osti.gov/biblio/1641333 Publication ID: 70077
  • Specht, P.E., Silling, S.A., Mitchell, J.A., Battaile, C., Brown, J.L., Wise, J.L., Adams, D.P., Brown, D., Palmer, T., Michael, J.R., Saavedra, M.P., & Saavedra, M.P. (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
  • Mitchell, J.A., Ivanoff, T., Madison, J., 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
  • Jared, B.H., Madison, J., Ivanoff, T., Swiler, L.P., Saiz, D.J., Dagel, D., Mitchell, J.A., 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
  • Madison, J., Dagel, D., Ivanoff, T., Jared, B.H., Koepke, J.R., Mitchell, J.A., Saiz, D.J., Swiler, L.P., & Swiler, L.P. (2019). Defect Signatures for Metal Laser Powder-Bed Fusion [Conference Poster]. https://www.osti.gov/biblio/1639421 Publication ID: 67500
  • Rodgers, T., Moser, D.R., Abdeljawad, F.F., Martinez, M., Ford, K., Trembacki, B.L., Johnson, K.L., Mitchell, J.A., Madison, J., & Madison, J. (2019). Calibrated Monte Carlo Models of Microstructure Evolution for Additive Manufacturing [Conference Poster]. https://www.osti.gov/biblio/1639467 Publication ID: 67582
  • Specht, P.E., Adams, D.P., Silling, S.A., Mitchell, J.A., Battaile, C., Brown, J.L., Wise, J.L., Brown, D., Palmer, T., Michael, J.R., Saavedra, M.P., & Saavedra, M.P. (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.A. (2018). Clustering to upscale microstructure morphologies [Conference Poster]. https://www.osti.gov/biblio/1806930 Publication ID: 59539
  • Specht, P.E., Adams, D.P., Mitchell, J.A., Silling, S.A., 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., Koepke, J.R., Swaller, E., Jared, B.H., Mitchell, J.A., Swiler, L.P., & Swiler, L.P. (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.F., Mitchell, J.A., & Mitchell, J.A. (2018). Lazy Minimal Eventually Consistent IO with Stitch [Conference Poster]. https://www.osti.gov/biblio/1592373 Publication ID: 59984
  • Jared, B.H., Madison, J., Ivanoff, T., Mitchell, J.A., Schwaller, E., Koepke, J.R., Saiz, D.J., Dagel, D., Brown-Shaklee, H.J., Swiler, L.P., & Swiler, L.P. (2018). Defect Signatures for Metal Laser Powder Bed Fusion [Conference Poster]. https://www.osti.gov/biblio/1581712 Publication ID: 63670
  • Rodgers, T., Moser, D.R., Mitchell, J.A., Abdeljawad, F.F., Martinez, M., Johnson, K.L., Madison, J., & Madison, J. (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
  • Ivanoff, T., Madison, J., Koepke, J.R., Jared, B.H., Mitchell, J.A., Swiler, L.P., & Swiler, L.P. (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
  • Ivanoff, T., Madison, J., Koepke, J.R., Jared, B.H., Mitchell, J.A., Swiler, L.P., & Swiler, L.P. (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
  • Rodgers, T., Mitchell, J.A., Madison, J., & Madison, J. (2018). Monte Carlo Simulation of Polycrystalline Additive Manufacturing Microstructures [Conference Poster]. https://www.osti.gov/biblio/1882035 Publication ID: 63097
  • Mitchell, J.A. (2018). Towards upscaling microstructural effects using data analytics [Conference Poster]. https://www.osti.gov/biblio/1806536 Publication ID: 63205
  • Lefantzi, S., Bolintineanu, D.S., Lechman, J.B., Madison, J., Martinez, M., Mitchell, J.A., Moser, D.R., Noble, D.R., 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
  • Jared, B.H., Koepke, J.R., Saiz, D.J., Swiler, L.P., Mitchell, J.A., Madison, J., 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
  • Mitchell, J.A. (2018). A local/nonlocal plasticity model for upscaling microstructural effects [Conference Poster]. https://www.osti.gov/biblio/1505276 Publication ID: 61383
  • 2017
  • Onunkwo, U., Ganti, A., Mitchell, J.A., Scoggin, M., Schroeppel, R.C., van Leeuwen, B.P., 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.A., 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.L., Brown, J.A., Abdeljawad, F.F., Madison, J., Mitchell, J.A., 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., Mitchell, J.A., 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.A. (2017). GrainGrowthModelingandNovelData AnalyticsforWeldProcess [Conference Poster]. https://www.osti.gov/biblio/1425305 Publication ID: 55055
  • 2016
  • Castillo, A.R., Mitchell, J.A., Bond, S.D., & Bond, S.D. (2016). Using and Developing Novel Data Analytics for Digitalized Microstructures. Draft. https://doi.org/10.2172/1762013 Publication ID: 101908
  • Tikare, V., Castillo, A., Bond, S.D., Madison, J., Mitchell, J.A., Rodgers, T., & Rodgers, T. (2016). Methods for Quantitative Characterization of Microstructures [Presentation]. https://www.osti.gov/biblio/1392762 Publication ID: 52204
  • Mitchell, J.A. (2016). Potts model for grain growth during welding using SPPARKS [Conference Poster]. https://www.osti.gov/biblio/1397119 Publication ID: 52561
  • Mitchell, J.A. (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.J., Mitchell, J.A., Thompson, A.P., & Thompson, A.P. (2015). Materials Modeling Capabiities [Presentation]. https://www.osti.gov/biblio/1340213 Publication ID: 42016
  • Mitchell, J.A. (2015). Ordinary Isotropic Constitutive Models for Peridynamics [Conference Poster]. https://www.osti.gov/biblio/1506748 Publication ID: 46192
  • Mitchell, J.A., Tikare, V., Weck, P.F., & Weck, P.F. (2015). Towards Using Eshelby Calculations to Enhance Kinetic Model for Zirconium Hydride Precipitation. https://doi.org/10.2172/1504854 Publication ID: 98900
  • Tikare, V., Weck, P.F., Mitchell, J.A., & Mitchell, J.A. (2015). Modeling of hydride precipitation and re-orientation. https://doi.org/10.2172/1332940 Publication ID: 45718
  • Littlewood, D.J., Silling, S.A., Mitchell, J.A., Seleson, P.D., Bond, S.D., Parks, M.L., Turner, D.Z., Burnett, D.J., 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.J., Silling, S.A., Seleson, P., Mitchell, J.A., & Mitchell, J.A. (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.A. (2015). Ordinary Isotropic Peridynamic Models: Position Aware Viscoelastic(PAVE) [Conference Poster]. https://www.osti.gov/biblio/1249043 Publication ID: 43120
  • Mitchell, J.A., 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
  • Mitchell, J.A. (2015). Ordinary Isotropic Peridynamic Models; Position Aware Linear Solid (PALS) [Presentation]. https://www.osti.gov/biblio/1239086 Publication ID: 41642
  • Baczewski, A.D., Frees, A., Bachman, W.B., Gao, X., Jacobson, N.T., Mitchell, J.A., Montano, I., Muller, R.P., Nielsen, E., & Nielsen, E. (2015). Device-Level Models Using Multi-Valley Effective Mass [Conference Poster]. https://www.osti.gov/biblio/1240116 Publication ID: 42249
  • Muller, R.P., Aidun, J.B., Baczewski, A.D., Gao, X., Metodi, T.S., Mitchell, J.A., Sterk, J.D., Bachman, W.B., Blume-Kohout, R.J., Jacobson, N.T., & Jacobson, N.T. (2015). Silicon Qubits By Design [Conference Poster]. https://www.osti.gov/biblio/1244872 Publication ID: 41211
  • Weck, P.F., Kim, E., Tikare, V., Mitchell, J.A., & Mitchell, J.A. (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
  • Mitchell, J.A., Silling, S.A., Littlewood, D.J., & Littlewood, D.J. (2015). A position-aware linear solid constitutive model for peridynamics. Journal of Mechanics of Materials and Structures, 10(5), pp. 539-557. https://doi.org/10.2140/jomms.2015.10.539 Publication ID: 97572
  • 2014
  • Mitchell, J.A., 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.A. (2014). Peridynamics Ordinary Isotropic Plasticity Model [Conference Poster]. https://www.osti.gov/biblio/1367575 Publication ID: 39541
  • Littlewood, D.J., Silling, S.A., Seleson, P.D., Mitchell, J.A., & Mitchell, J.A. (2014). Integrating Meshfree Peridynamic Models with Classical Finite Element Analysis [Conference Poster]. https://www.osti.gov/biblio/1242046 Publication ID: 39224
  • Mitchell, J.A. (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.A., Mitchell, J.A., & Mitchell, J.A. (2014). Unifying the mechanics of continua cracks and particles [Presentation]. https://www.osti.gov/biblio/1496960 Publication ID: 37911
  • Mitchell, J.A., Silling, S.A., Littlewood, D.J., & Littlewood, D.J. (2014). Ordinary Isotropic Peridynamic Models\ Position Aware Linear Solid (PALS) [Presentation]. https://www.osti.gov/biblio/1497522 Publication ID: 37360
  • Littlewood, D.J., Silling, S.A., Lehoucq, R.B., Parks, M.L., Mitchell, J.A., Turner, D.Z., Bond, S.D., & Bond, S.D. (2014). Peridynamic Modeling of Material Failure and Fracture [Presentation]. https://www.osti.gov/biblio/1706390 Publication ID: 40489
  • 2013
  • Mitchell, J.A., Silling, S.A., & Silling, S.A. (2013). Towards Addressing Surface Effects in Ordinary Isotropic Peridynamic Models Position Aware Linear Solid (PALS) [Conference]. https://www.osti.gov/biblio/1121945 Publication ID: 31795
  • Mitchell, J.A. (2013). Algorithms and Cuda Concepts \ Hexahedron for FE Solid Mechanics [Conference]. https://www.osti.gov/biblio/1115041 Publication ID: 36130
  • Mitchell, J.A., Fuller, T.J., & Fuller, T.J. (2013). Nonlinear kinematics for piezoelectricity in ALEGRA-EMMA. https://doi.org/10.2172/1096508 Publication ID: 35465
  • Littlewood, D.J., Parks, M.L., Mitchell, J.A., Silling, S.A., & Silling, S.A. (2013). The Peridigm Framework for Peridynamic Simulations [Conference]. https://www.osti.gov/biblio/1106141 Publication ID: 34697
  • Mitchell, J.A. (2013). On a Key Challenge for Peridynamics the Dreaded Surface Effect [Presentation]. https://www.osti.gov/biblio/1666220 Publication ID: 34751
  • Parks, M.L., Littlewood, D.J., Mitchell, J.A., Silling, S.A., & Silling, S.A. (2013). Peridigm: A New Paradigm in Computational Peridynamics [Presentation]. https://www.osti.gov/biblio/1657016 Publication ID: 32415
  • Mitchell, J.A. (2013). On the ‘DSF’ and the ‘Dreaded Surface Effect’ [Conference]. https://www.osti.gov/biblio/1068427 Publication ID: 32455
  • Mitchell, J.A. (2013). On the X in MPI%2BX %5C Briefly: Strategies and Approach %5C for %5C Solid Mechanics [Conference]. https://www.osti.gov/biblio/1062959 Publication ID: 31618
  • Littlewood, D.J., Parks, M.L., Mitchell, J.A., Silling, S.A., & Silling, S.A. (2013). The Peridigm Framework for Peridynamic Simulations [Conference]. https://www.osti.gov/biblio/1062955 Publication ID: 31659
  • Parks, M.L., Littlewood, D.J., Mitchell, J.A., Silling, S.A., & Silling, S.A. (2013). Computational Peridynamics [Presentation]. https://www.osti.gov/biblio/1649818 Publication ID: 31242
  • 2012
  • Parks, M.L., Littlewood, D.J., Mitchell, J.A., Silling, S.A., & Silling, S.A. (2012). Peridigm users’ guide. V1.0.0. https://doi.org/10.2172/1055619 Publication ID: 30077
  • Parks, M.L., Littlewood, D.J., Mitchell, J.A., Silling, S.A., Lehoucq, R.B., & Lehoucq, R.B. (2012). Peridynamics for Material Failure [Presentation]. https://www.osti.gov/biblio/1648018 Publication ID: 30289
  • Mitchell, J.A. (2012). Mean curl formulation on quadrilaterals with application to implicit magnetics diffusion equations in Alegra 2D. https://doi.org/10.2172/1057253 Publication ID: 28624
  • Parks, M.L., Littlewood, D.J., Silling, S.A., Lehoucq, R.B., Mitchell, J.A., & Mitchell, J.A. (2012). Peridynamics for Material Failure [Presentation]. https://www.osti.gov/biblio/1656996 Publication ID: 27570
  • Mitchell, J.A. (2012). Ordinary Constitutive Models for Peridynamics Nonlocal Extensions to Plasticity Viscoelasticity%7D [Conference]. https://www.osti.gov/biblio/1068402 Publication ID: 27242
  • 2011
  • Mitchell, J.A. (2011). A non-local, ordinary-state-based viscoelasticity model for peridynamics. https://doi.org/10.2172/1029821 Publication ID: 25112
  • Parks, M.L., Littlewood, D.J., Salinger, A.G., Mitchell, J.A., & Mitchell, J.A. (2011). Peridigm summary report : lessons learned in development with agile components. https://doi.org/10.2172/1029829 Publication ID: 24597
  • Mitchell, J.A. (2011). A Nonlocal Ordinary State-Based Plasticity Model for Peridynamics [Conference]. https://www.osti.gov/biblio/1106734 Publication ID: 23652
  • Mitchell, J.A. (2011). A nonlocal, ordinary, state-based plasticity model for peridynamics. https://doi.org/10.2172/1018475 Publication ID: 22692
  • 2009
  • Mitchell, J.A., Baker, M.S., & Baker, M.S. (2009). Calibration of an interfacial force microscope for MEMS metrology : FY08-09 activities. https://doi.org/10.2172/1001011 Publication ID: 16903
  • 2008
  • Wittwer, J.W., Baker, M.S., Mitchell, J.A., Epp, D., Clemens, R.C., Brake, M.R.W., Walraven, J., & Walraven, J. (2008). The Sandia MEMS passive shock sensor : FY08 design summary. https://doi.org/10.2172/945193 Publication ID: 15167
  • Epp, D., Brake, M.R.W., Baker, M.S., Wittwer, J.W., Clemens, R.C., Mitchell, J.A., Walraven, J., & Walraven, J. (2008). The Sandia MEMS Passive Shock Sensor : FY08 testing for functionality, model validation, and technology readiness. https://doi.org/10.2172/943322 Publication ID: 15044
  • Mitchell, J.A., Baker, M.S., Blecke, J., Clemens, R.C., Epp, D., Houston, J., Walraven, J., Wittwer, J.W., & Wittwer, J.W. (2008). The Sandia MEMS passive shock sensor : FY07 maturation activities. https://doi.org/10.2172/940529 Publication ID: 14448
  • Walraven, J., Baker, M.S., Wittwer, J.W., Epp, D., Brake, M.R.W., Clemens, R.C., Mitchell, J.A., & Mitchell, J.A. (2008). The Sandia MEMS Passive Shock Sensor : FY08 failure analysis activities. https://doi.org/10.2172/939847 Publication ID: 14449
  • 2007
  • Hochrein, J.M., Baker, M.S., Brown, J.R., Jakaboski, B.E., Mitchell, J.A., Thornberg, S.M., Wavrik, R., & Wavrik, R. (2007). Impact of Die Adhesives on MEMS Reliability [Conference]. https://www.osti.gov/biblio/1146318 Publication ID: 12333
  • Mitchell, J.A. (2007). Measuring the maturity of a technology : guidance on assigning a TRL. https://doi.org/10.2172/921752 Publication ID: 11702
  • Mitchell, J.A., Sleefe, G.E., & Sleefe, G.E. (2007). On the Practical Application of Technology Readiness Levels [Conference]. https://www.osti.gov/biblio/1147255 Publication ID: 10712
  • 2005
  • Mitchell, J.A., Wittwer, J.W., Epp, D., & Epp, D. (2005). On the modeling, design and validation of two dimensional quasi-static eddy current forces in a mechanical oscillator. https://doi.org/10.2172/876522 Publication ID: 6127
  • 2003
  • Hales, J.D., Mitchell, J.A., Wong, C.C., & Wong, C.C. (2003). Calagio :a coupled thermal-mechanical analysis code [Conference]. https://www.osti.gov/biblio/915204 Publication ID: 1809
Showing 10 of 106 publications.