All Stories

  1. Constitutive relations for slip and twinning in high rate deformations: A review and update

    Article • Journal of Applied Physics, December 2021, American Institute of Physics

    Professor Ronald W Armstrong

  2. Takeo Yokobori and micro- to macro-fracturing of polycrystals

    Article • Strength Fracture and Complexity, March 2020, IOS Press

    Professor Ronald W Armstrong

  3. Crystal Engineering for Mechanical Strength at Nano-Scale Dimensions

    Article • Crystals, October 2017, MDPI AG

    Professor Ronald W Armstrong

  4. Crystal Indentation Hardness

    Article • Crystals, January 2017, MDPI AG

    Professor Ronald W Armstrong

  5. Crystal Dislocations

    Article • Crystals, January 2016, MDPI AG

    Professor Ronald W Armstrong

  6. Fracturing across the multi-scales of diverse materials

    Article • Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences, February 2015, Royal Society Publishing

    Professor Ronald W Armstrong

  7. Material grain size and crack size influences on cleavage fracturing

    Article • Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences, February 2015, Royal Society Publishing

    Professor Ronald W Armstrong

  8. Hall–Petchkdependencies in nanopolycrystals

    Article • Emerging Materials Research, December 2014, ICE Publishing

    Professor Ronald W Armstrong

  9. Symmetry Aspects of Dislocation-Effected Crystal Properties: Material Strength Levels and X-ray Topographic Imaging

    Article • Symmetry, March 2014, MDPI AG

    Professor Ronald W Armstrong

  10. Engineering science aspects of the Hall–Petch relation

    Article • Acta Mechanica, February 2014, Springer Science + Business Media

    Professor Ronald W Armstrong

  11. A Dislocation Pile-Up Computation for Adiabatic Shear Banding

    Article • MRS Proceedings, January 2014, Cambridge University Press

    Professor Stephen D Antolovich, Professor Ronald W Armstrong

  12. 60 Years of Hall-Petch: Past to Present Nano-Scale Connections

    Article • MATERIALS TRANSACTIONS, January 2014, Japan Institute of Metals

    Professor Ronald W Armstrong

  13. Hall-Petch analysis of dislocation pileups in thin material layers and in nanopolycrystals

    Article • Journal of Materials Research, March 2013, Springer Science + Business Media

    Professor Ronald W Armstrong

  14. Hardness properties across multiscales of applied loads and material structures

    Article • Materials Science and Technology, October 2012, Taylor & Francis

    Professor Ronald W Armstrong

  15. Detailed characterization of PBX morphology for mesoscale simulations

    Article • January 2012, American Institute of Physics

    Professor Ronald W Armstrong

  16. Strength and Strain-Rate Sensitivity of Nanopolycrystals

    Article • September 2011, Taylor & Francis

    Professor Ronald W Armstrong

  17. The Hardness and Strength Properties of WC-Co Composites

    Article • Materials, July 2011, MDPI AG

    Professor Ronald W Armstrong

  18. DISLOCATION MECHANICS UNDER EXTREME PRESSURES

    Article • January 2008, American Institute of Physics

    Professor Ronald W Armstrong

  19. Role of Intracloud Lightning in Tornadogenesis

    Article • March 2005, Defense Technical Information Center (DTIC)

    Professor Ronald W Armstrong

  20. The Seeds of Tornado Prevention

    Article • July 2004, Defense Technical Information Center (DTIC)

    Professor Ronald W Armstrong

  21. Dislocation characteristics in energetic crystals

    Article • January 2000, American Institute of Physics

    Professor Ronald W Armstrong

  22. Split-Hopkinson pressure bar tests on pure tantalum

    Article • January 1998, American Institute of Physics

    Professor Ronald W Armstrong

  23. Dislocation mechanics based constitutive equation incorporating dynamic recovery and applied to thermomechanical shear instability

    Article • January 1998, American Institute of Physics

    Professor Ronald W Armstrong

  24. Emeritus Professor Ronald Kitching

    Article • International Journal of Mechanical Sciences, September 1997, Elsevier

    Professor Ronald W Armstrong

  25. Norman J. Petch and his Contributions to Materials Science

    Article • MRS Proceedings, January 1994, Cambridge University Press

    Professor Ronald W Armstrong

  26. Hall-Petch Analysis of Yield, Flow and Fracturing

    Article • MRS Proceedings, January 1994, Cambridge University Press

    Professor Ronald W Armstrong

  27. Hall-Petch Basis for Assessing Alloy Strengthening

    Article • MRS Proceedings, January 1994, Cambridge University Press

    Professor Ronald W Armstrong

  28. Deformation Twinning and Grain Size Aspects of Numerical Simulations of Plastic Flow

    Article • MRS Proceedings, January 1994, Cambridge University Press

    Professor Ronald W Armstrong

  29. Structure and Properties of Energetic Materials

    Article • December 1992, Defense Technical Information Center (DTIC)

    Professor Ronald W Armstrong

  30. MODELING SHOCK WAVES WITH DISLOCATION MECHANICS BASED CONSTITUTIVE RELATIONS

    Article • January 1992, Elsevier

    Professor Ronald W Armstrong

  31. NANODISLOCATION STRUCTURES FOR SHOCK STRENGTHENING

    Article • January 1992, Elsevier

    Professor Ronald W Armstrong

  32. LM-ACT for Imaging RAM Devices in X-Ray Diffraction Topographs

    Article • January 1989, Springer Science + Business Media

    Professor Ronald W Armstrong