Mechanical Engineering Faculty Profile:

Dr. Ronald W. Armstrong
Professor Emeritus of Mechanical Engineering

Email: rona@umd.edu

Research Interests

Strength and structure of materials, dislocation modeling, crystallography, X‑ray diffraction topography, single crystal/polycrystal deformation/fracturing, explosive crystals, dynamic plasticity, fracture toughness, hardness testing, prosthetic devices, electronic materials.

Education

Postdoctoral Studies, Leeds University, UK, 1959
Ph.D., Carnegie Mellon University, 1958
B.E.S., Johns Hopkins University, 1955

Select Publications

• F.J. Zerilli and R.W. Armstrong, A constitutive equation for the dynamic deformation of polymers, J. Mater. Sci., 42, [12], 4562-4574 (2007).
• R.W. Armstrong and S.M. Walley, High Strain Rate Properties of Metals and Alloys, Intern. Mater. Rev., 53, [3], 105-128 (2008).
• R.W. Armstrong, Dislocation Viscoplasticity Aspects of Material Fracturing, Invited for Special Issue of Eng. Fract. Mech, honoring G.R. Irwin (2008).
• R.W. Armstrong, W. Arnold and F.J. Zerilli, Dislocation mechanics of copper and iron in high rate deformation tests, J. Appl. Phys. 105 (2009) 023511.
• (Invited) R.W. Armstrong, Dislocation Mechanics Aspects of Energetic Material Composites. Reviews on Advanced Materials Science, 19, 13-40 (2009).
• R.W. Armstrong, Strength and Strain Rate Sensitivity of Nanopolycrystals, Invited for Mechanical Properties of Nanocrystalline Materials, J.C.M. Li, editor, Pan Stanford Publishing, World Scientific Publishing, Hackensack, NJ (2009).
• R.W. Armstrong and W.L. Elban, Macro- to Nano-indentation Hardness Stress – Strain Aspects of Crystal Elastic/Plastic/Cracking Behaviors, Exp. Mech. published online DOI 10.1007/s11340-009-9246-5 (29 April 2009).

Scientific and Professional Membership

Fellow - American Society for Metals; Life Member - Clare Hall, University of Cambridge, U.K.; Honorary Member - Materials Research Society of India and Indian Institute of Metals;
Member - American Physical Society; American Society for Materials; The (TMS) Minerals, Metals and Materials Society; and, Materials Research Society.

Honors and Awards

AIME Robert Lansing Hardy Gold Medal for 1962; Senior Fulbright‑Hays Fellow, New Zealand, 1974; NATO Advanced Study Institute Lecturer, England 1979, Crete 1985; Who's Who in America, 1982‑89; Liaison Scientist, Office of Naval Research‑London, UK 1982‑1984, 1991; Visiting Research Fellow, now Life Member, Clare Hall, Univ. Cambridge, UK, 1984; Symposium in Honor of Professor Ronald W. Armstrong, Dynamic Deformation: Constitutive Modeling, Grain Size, and Other Effects, TMS 2003, 132nd Annual Meeting and Exhibition, 3/2-6/2003, San Diego, CA; see Metall. Mater. Trans. A, 35A, 2545-2745 (2004). Invited to present/publish more than 50 technical papers in Symposia, among more than 300 technical journal and symposium publications.

ME Home | Faculty Listing  |  Staff Listing